Pub Date : 2024-07-01DOI: 10.1615/jpormedia.2024052723
Hossam Nabwey, Waqar A. Khan, zeinab Abdelrahman, Ahmed M. Rashad, Miad Abu Hawsah
The present paper proposes the mathematical model for non-Newtonian fluid (Ree-Eyring model) towards a stretched sheet with the porous medium by considering the gyrotactic microorganisms and the inclined magnetic field. The composite of Al_2 O_3,Ag,and Ti O_2 in water is called ternary-hybrid nanofluid (THNF), while the composite relation among Al_2 O_3,Ag in water is known as hybrid nanofluid (HNF), and Al_2 O_3 in water is the nanofluid (NF).The Buongiorno model is used inflow modeling to investigate thermophoresis and Brownian motion. The appropriate transformations are implemented to transform governing partial differential equations into coupled nonlinear ordinary differential equations by similarity transformation. The mathematical model is converted to ODEs using suitable similarity transformation. The bvp4c function in MATLAB is used to solve boundary value problems (BVPs) for systems of ordinary differential equations (ODEs). It is part of the MATLAB's Boundary Value Problems (BVP) solver suite. The effects of the physical parameters on the dimensionless variables and quantities of physical interest are analyzed with the aid of figures. It is demonstrated that ternary hybrid nanofluids provide the highest heat transfer rate at the cost of skin friction and offer the lowest Bejan number and entropy generation rates. They also reduce mass and microorganisms transfer rates. Furthermore, magnetic field, local inertia, Eckert number, and thermal slip reduce the Bejan number by promoting more efficient heat transfer.
{"title":"Non-Darcy Bioconvective Flow of the Ree-Eyring Ternary-Hybrid Nanofluid over a Stretching Sheet with Velocity and Thermal Slips: Entropy Analysis","authors":"Hossam Nabwey, Waqar A. Khan, zeinab Abdelrahman, Ahmed M. Rashad, Miad Abu Hawsah","doi":"10.1615/jpormedia.2024052723","DOIUrl":"https://doi.org/10.1615/jpormedia.2024052723","url":null,"abstract":"The present paper proposes the mathematical model for non-Newtonian\u0000fluid (Ree-Eyring model) towards a stretched sheet with the porous medium by considering the gyrotactic microorganisms and the inclined magnetic field. The composite of Al_2 O_3,Ag,and Ti O_2 in water is called ternary-hybrid nanofluid (THNF), while the composite relation among Al_2 O_3,Ag in water is known as hybrid nanofluid (HNF), and Al_2 O_3 in water is the nanofluid (NF).The Buongiorno model is used inflow modeling to investigate thermophoresis and Brownian motion. The appropriate transformations are implemented to transform governing partial differential equations into coupled nonlinear ordinary differential equations by similarity transformation. The mathematical model is converted to ODEs using suitable similarity transformation. The bvp4c function in MATLAB is used to solve boundary value problems (BVPs) for systems of ordinary differential equations (ODEs). It is part of the MATLAB's Boundary Value Problems (BVP) solver suite. The effects of the physical parameters on the dimensionless variables and quantities of physical interest are analyzed with the aid of figures. It is demonstrated that ternary hybrid nanofluids provide the highest heat transfer rate at the cost of skin friction and offer the lowest Bejan number and entropy generation rates. They also reduce mass and microorganisms transfer rates. Furthermore, magnetic field, local inertia, Eckert number, and thermal slip reduce the Bejan number by promoting more efficient heat transfer.","PeriodicalId":50082,"journal":{"name":"Journal of Porous Media","volume":"24 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141548556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-01DOI: 10.1615/jpormedia.2024052329
Wei Wang, Diansen Yang, Xing Wang, Yijie Liu, Zecheng Chi
The pressure-oscillation method is a relatively new experimental approach for evaluating the seepage characteristics of porous media. It allows for simultaneous measurement of permeability and porosity, while offering several advantages, including flexibility, automation, and data re-peatability. However, there has been limited research on the data inversion process using this method. In this study, a data inversion process is proposed based on the theoretical solution proposed by Fischer (1992). The reliability and accuracy of the method are verified through synthetic signals and computation cases. The data inversion process involves two steps: processing the gas pres-sure data using fast Fourier transform and local extreme value locate to obtain the amplitude ratio and phase delay, and calcu-lating intermediate parameters that relate to gas apparent permeability and effective porosity using graphical and numerical root-finding algorithm. The calculation process is simplified by not calculating one complex intermediate parameter. The data inversion process is demonstrated using 11 computation cases, showing its intuitive nature, fast computation, deterministic results, and high accuracy. The impact of various factors on the gas pressure variations of downstream reservoir is analyzed through case analysis. This study can serve as a valuable reference for de-signing experiments using the gas pressure-oscillation method.
{"title":"Research on data inversion process of gas pressure-oscillation method for low permeability testing in porous media","authors":"Wei Wang, Diansen Yang, Xing Wang, Yijie Liu, Zecheng Chi","doi":"10.1615/jpormedia.2024052329","DOIUrl":"https://doi.org/10.1615/jpormedia.2024052329","url":null,"abstract":"The pressure-oscillation method is a relatively new experimental approach for evaluating the seepage characteristics of porous media. It allows for simultaneous measurement of permeability and porosity, while offering several advantages, including flexibility, automation, and data re-peatability. However, there has been limited research on the data inversion process using this method. In this study, a data inversion process is proposed based on the theoretical solution proposed by Fischer (1992). The reliability and accuracy of the method are verified through synthetic signals and computation cases. The data inversion process involves two steps: processing the gas pres-sure data using fast Fourier transform and local extreme value locate to obtain the amplitude ratio and phase delay, and calcu-lating intermediate parameters that relate to gas apparent permeability and effective porosity using graphical and numerical root-finding algorithm. The calculation process is simplified by not calculating one complex intermediate parameter. The data inversion process is demonstrated using 11 computation cases, showing its intuitive nature, fast computation, deterministic results, and high accuracy. The impact of various factors on the gas pressure variations of downstream reservoir is analyzed through case analysis. This study can serve as a valuable reference for de-signing experiments using the gas pressure-oscillation method.","PeriodicalId":50082,"journal":{"name":"Journal of Porous Media","volume":"337 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141740191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The ternary hybrid nanofluid flow comprising multi-walled carbon nanotube, copper, and silicon dioxide dispersed in a host fluid of water in a Darcy-Forchheimer medium past an elongated surface is deliberated in the current study. The novelty of the contemplated model is developed by incorporating the influences of mixed convection in the momentum equation and heat source and Cattaneo-Christov thermal flux in the energy equation. Shape factor analysis of the nanoparticles is also performed to calculate the thermal efficacy. An application of the appropriate similarity variables is made to transmute the governing system of PDEs into an ordinary differential system, whose numeric solution is determined by the bvp4c package in MATLAB. The outcome drawn in this study is that the ternary hybrid nanofluid MWCNT-Cu-SiO2/H2O can provide effective thermal transmission efficiency compared to Cu-SiO2/H2O hybrid nanofluid. Additionally, the lamina-shaped nanoparticles seem to exhibit an improved thermal profile and greater heat transmission rate than platelets shaped ones. Moreover, a comparison table is included to authenticate the present model and a great correlation is attained.
{"title":"Nanoparticle shape factor analysis on radiative ternary nanofluid (MWCNT-Cu-SiO2/H2O) flow with non-Fourier thermal flux","authors":"Madiha Takreem Kottur, Venkata Satya Narayana Panyam","doi":"10.1615/jpormedia.2024051855","DOIUrl":"https://doi.org/10.1615/jpormedia.2024051855","url":null,"abstract":"The ternary hybrid nanofluid flow comprising multi-walled carbon nanotube, copper, and\u0000silicon dioxide dispersed in a host fluid of water in a Darcy-Forchheimer medium past an\u0000elongated surface is deliberated in the current study. The novelty of the contemplated model is\u0000developed by incorporating the influences of mixed convection in the momentum equation and\u0000heat source and Cattaneo-Christov thermal flux in the energy equation. Shape factor analysis\u0000of the nanoparticles is also performed to calculate the thermal efficacy. An application of the\u0000appropriate similarity variables is made to transmute the governing system of PDEs into an\u0000ordinary differential system, whose numeric solution is determined by the bvp4c package in\u0000MATLAB. The outcome drawn in this study is that the ternary hybrid nanofluid MWCNT-Cu-SiO2/H2O can provide effective thermal transmission efficiency compared\u0000to Cu-SiO2/H2O hybrid nanofluid. Additionally, the lamina-shaped nanoparticles seem to\u0000exhibit an improved thermal profile and greater heat transmission rate than platelets shaped\u0000ones. Moreover, a comparison table is included to authenticate the present model and a great\u0000correlation is attained.","PeriodicalId":50082,"journal":{"name":"Journal of Porous Media","volume":"76 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141502222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-01DOI: 10.1615/jpormedia.2024052929
Aniket Dhavale, Mandar lele
This study addresses the imperative requirement for efficient utilization of solar energy by examining the incorporation of metal foam heat exchangers into solar flat plate collectors, with a focus on enhancing their thermal performance. The primary objective of this study is to experimentally evaluate single-phase double-tube heat exchangers with and without the incorporation of metal foam in the annular space. By conducting experiments with hot and cold water at various flow rates, the research aims to assess the impact of metal foam on key parameters such as heat transfer coefficient, Nusselt number, Reynolds number, effectiveness, and pressure drop. Furthermore, the study compares the experimental results with established correlations from existing literature. The experiments are performed with hot and cold water at different flow rates of 25 liters per hour and (25-50) liters per hour at 650C and room temperature, respectively. Nickel metal foam with 10 Pores Per Inch and 0.9 porosity is fitted in the annular space. The results of the study indicate that the incorporation of metal foam leads to a significant improvement in heat transfer performance, up to 2.2 times compared to a traditional heat exchanger. However, this enhancement in heat transfer comes at the cost of increased pressure drop across the metal foam heat exchanger. The investigation is significant as it offers insights into the potential of metal foam to improve heat exchanger performance. Therefore, the research highlights the existence of a trade-off between heat transfer efficiency and pressure drop when designing double-tube heat exchangers with metal foam. This work provides valuable insights into
{"title":"Investigating Heat Transfer Enhancement Using Metal Foam in Double Tube Heat Exchangers-Experimental Approach","authors":"Aniket Dhavale, Mandar lele","doi":"10.1615/jpormedia.2024052929","DOIUrl":"https://doi.org/10.1615/jpormedia.2024052929","url":null,"abstract":"This study addresses the imperative requirement for efficient utilization of solar energy by examining the incorporation of metal foam heat exchangers into solar flat plate collectors, with a focus on enhancing their thermal performance. The primary objective of this study is to experimentally evaluate single-phase double-tube heat exchangers with and without the incorporation of metal foam in the annular space. By conducting experiments with hot and cold water at various flow rates, the research aims to assess the impact of metal foam on key parameters such as heat transfer coefficient, Nusselt number, Reynolds number, effectiveness, and pressure drop. Furthermore, the study compares the experimental results with established correlations from existing literature. The experiments are performed with hot and cold water at different flow rates of 25 liters per hour and (25-50) liters per hour at 650C and room temperature, respectively. Nickel metal foam with 10 Pores Per Inch and 0.9 porosity is fitted in the annular space. The results of the study indicate that the incorporation of metal foam leads to a significant improvement in heat transfer performance, up to 2.2 times compared to a traditional heat exchanger. However, this enhancement in heat transfer comes at the cost of increased pressure drop across the metal foam heat exchanger. The investigation is significant as it offers insights into the potential of metal foam to improve heat exchanger performance. Therefore, the research highlights the existence of a trade-off between heat transfer efficiency and pressure drop when designing double-tube heat exchangers with metal foam. This work provides valuable insights into","PeriodicalId":50082,"journal":{"name":"Journal of Porous Media","volume":"56 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141502223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-01DOI: 10.1615/jpormedia.2024052183
TANYA GUPTA, Manoj Kumar
This research presents a semi-analytical method for investigating the heat transfer of a hybrid nanofluid over an inclined porous stretched sheet under the influence of a magnetic field, non-linear radiation, linear and exponential heat source/sink with convective heating, and slip condition. For assessing the thermal propagation time, the Cattaneo-Christov model is used. The Legendre wavelet collocation technique (LWCT) was used, which employs an operational matrix of integration (OMI) and is capable of producing more accurate findings than other approaches. The hybrid nanofluid is made up of nanoparticles AA7072 and AA7075, as well as ethylene glycol and water (50%-50%) as the base fluid. The heat transfer enhancement is determined to be 19.46% when the volume fraction is increased from 2% to 10%. It is also clear that the thermal relaxation parameter reduces the thermal profile, whereas linear and exponential heat sources improve it. It is also noted that the velocity profile for the horizontal sheet decreases with volume fraction but increases for the vertical sheet.
{"title":"Legendre wavelet collocation method to simulate the effect of linear and exponential heat source/sink on AA7072-AA7075/EG-H2O flow over a stretching sheet with Cattaneo-Christov model","authors":"TANYA GUPTA, Manoj Kumar","doi":"10.1615/jpormedia.2024052183","DOIUrl":"https://doi.org/10.1615/jpormedia.2024052183","url":null,"abstract":"This research presents a semi-analytical method for investigating the heat transfer of a hybrid nanofluid over an inclined porous stretched sheet under the influence of a magnetic field, non-linear radiation, linear and exponential heat source/sink with convective heating, and slip condition. For assessing the thermal propagation time, the Cattaneo-Christov model is used. The Legendre wavelet collocation technique (LWCT) was used, which employs an operational matrix of integration (OMI) and is capable of producing more accurate findings than other approaches. The hybrid nanofluid is made up of nanoparticles AA7072 and AA7075, as well as ethylene glycol and water (50%-50%) as the base fluid. The heat transfer enhancement is determined to be 19.46% when the volume fraction is increased from 2% to 10%. It is also clear that the thermal relaxation parameter reduces the thermal profile, whereas linear and exponential heat sources improve it. It is also noted that the velocity profile for the horizontal sheet decreases with volume fraction but increases for the vertical sheet.","PeriodicalId":50082,"journal":{"name":"Journal of Porous Media","volume":"19 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141502221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-01DOI: 10.1615/jpormedia.2024052416
Samah. A Ali, Precious Sibanda, Munyaradzi Rudziva, Osman A.I Noreldin, Sicelo P. Goqo, Hloniphile S. Mthethwa
The study investigates the double-diffusive convection onset in a non-uniformly rotating anisotropic porous fluid layer under the influence of Soret and internal heating effects. The linear stability approach is employed to investigate the system when subjected to infinitesimal perturbations. The nonlinear case is investigated using a minimum truncated double Fourier series, leading to the derivation of nonlinear Lorenz-type equations. To solve these coupled equations, a local quasilinearization block hybrid method (LQBHM) is utilized. The analysis shows that the stability of the fluid system is dependent on the values of the Soret coefficient, rotation parameter, anisotropy parameters, and internal heating. Among other results, it was observed that the rotation and thermal anisotropy parameters have stabilizing effects on the fluid system. Additionally, the rotation modulation amplitude increases the rates of heat and mass transfer and so advances the onset of convection in the fluid system, whereas the modulation frequency has the opposite effect.
{"title":"NONLINEAR DOUBLE-DIFFUSIVE CONVECTION IN AN ANISOTROPIC POROUS LAYER UNDER TIME-DEPENDENT ROTATION WITH INTERNAL HEATING AND SORET EFFECT","authors":"Samah. A Ali, Precious Sibanda, Munyaradzi Rudziva, Osman A.I Noreldin, Sicelo P. Goqo, Hloniphile S. Mthethwa","doi":"10.1615/jpormedia.2024052416","DOIUrl":"https://doi.org/10.1615/jpormedia.2024052416","url":null,"abstract":"The study investigates the double-diffusive convection onset in a non-uniformly rotating anisotropic porous fluid layer under the influence of Soret and internal heating effects. The linear stability approach is employed to investigate the system when subjected to infinitesimal perturbations. The nonlinear case is investigated using a minimum truncated\u0000double Fourier series, leading to the derivation of nonlinear Lorenz-type equations. To solve these coupled equations,\u0000a local quasilinearization block hybrid method (LQBHM) is utilized. The analysis shows that the stability of the fluid system is dependent on the values of the Soret coefficient, rotation parameter, anisotropy parameters, and internal heating. Among other results, it was observed that the rotation and thermal anisotropy parameters have stabilizing effects on the fluid system. Additionally, the rotation modulation amplitude increases the rates of heat and mass transfer and so advances the onset of convection in the fluid system, whereas the modulation frequency has the opposite effect.","PeriodicalId":50082,"journal":{"name":"Journal of Porous Media","volume":"39 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141502224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-01DOI: 10.1615/jpormedia.2024052398
syrine khadhrawi, haikel ben hamed, fakhreddine segni oueslati
The primary motive of the study is to explore numerically the heat transfer a hybrid solar collector, which is a partially filled Cartesian channel with random generated Metal Foam (MF). The channel is subjected to solar irradiation, and through it the air flows.To generate the MF, random Gaussian correlations are used. This technique allows spatial control of density, permeability, and porosity, whose values are also theoretically accessible. To solve the equations of fluid dynamics and heat transfer, a finite volume multigrid scheme is used. Energy equation is framed on the two temperatures model, and momentum equation is that of the clear fluid case, since the pore’s volumes are largely greater than the VER in the porous media. Thevelocity as well as temperature fields are discussed for different pertinent parameters, and mathematic correlations are given between the Nusselt, the porosity, the Richardson and the Reynolds numbers. It is found that beyond two blocks, it is useless to add MF because we reach higher homogeneity in temperature and good efficiency in heat transfer. It is also found that the two temperatures model is very realisticthan models with averaged properties, and gives wide range of perspectivesthanks to the possibility of carrying out numerical and experimental investigations onthe same MF model: randomly generated and printable in 3D
{"title":"MATHEMATICAL RANDOM GENERATION OF METAL FOAM AND NUMERICAL 3D SIMULATIONS OF HEAT TRANSFER IN A HYBRID SOLAR COLLECTOR","authors":"syrine khadhrawi, haikel ben hamed, fakhreddine segni oueslati","doi":"10.1615/jpormedia.2024052398","DOIUrl":"https://doi.org/10.1615/jpormedia.2024052398","url":null,"abstract":"The primary motive of the study is to explore numerically the heat transfer a hybrid solar collector, which is a partially filled Cartesian channel with random generated Metal Foam (MF). The channel is subjected to solar irradiation, and through it the air flows.To generate the MF, random Gaussian correlations are used. This technique allows spatial control of density, permeability, and porosity, whose values are also theoretically accessible. To solve the equations of fluid dynamics and heat transfer, a finite volume multigrid scheme is used. Energy equation is framed on the two temperatures model, and momentum equation is that of the clear fluid case, since the pore’s volumes are largely greater than the VER in the porous media. Thevelocity as well as temperature fields are discussed for different pertinent parameters, and mathematic correlations are given between the Nusselt, the porosity, the Richardson and the Reynolds numbers. It is found that beyond two blocks, it is useless to add MF because we reach higher homogeneity in temperature and good efficiency in heat transfer. It is also found that the two temperatures model is very realisticthan models with averaged properties, and gives wide range of perspectivesthanks to the possibility of carrying out numerical and experimental investigations onthe same MF model: randomly generated and printable in 3D","PeriodicalId":50082,"journal":{"name":"Journal of Porous Media","volume":"25 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141502220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-01DOI: 10.1615/jpormedia.2024052654
Muhammad Bilal, Saif Ullah, Almetwally M. Mostafa, Nouf F. AlQahtani, Shuo Li
Wastewater disposal plays an important role in several sectors of industry and environmental systems. The objective of the present research is to avoid and monitor pollutants discharge in the pure water resource. For the purpose, the influence of PDC (pollutant discharge concentration) on the non-Newtonian hybrid nanofluids (NNNF) flow across a porous surface of Riga sheet is examined. The two different types of NNNF (second-grade and Walter’s B fluids) have been considered. The copper (Cu) and iron oxide (Fe3O4) nanoparticles (NPs) are used in the base fluid Sodium Alginate (C6H9NaO7) to prepare the hybrid nanofluid. The NNNF flow is designed in form of nonlinear system of partial differential equations (PDEs), which are simplified to dimensionless form of ordinary differential equations by using similarity transformation and then numerically handled through the parametric continuation method (PCM). The numerical results of the proposed model are compared with the published literature for the limiting case. The present results reveal higher similarity with the existing study. From the graphical results, it can be observed that the fluid temperature drops with the variation of Cu and Fe3O4-NPs. The influence of external pollutant factor enhances the concentration of pollutants in case of both fluids. Furthermore, the rising quantity of Cu and Fe3O4 NPs in Sodium Alginate based hybrid nanofluid, the energy transfer rate enhances form 3.79% to 8.25%, in case of Second-Grade hybrid nanofluid and 3.88% to 9.86% in case of Walter’s B hybrid nanofluid respectively.
废水处理在多个工业部门和环境系统中发挥着重要作用。本研究的目的是避免和监测纯净水资源中的污染物排放。为此，研究了 PDC（污染物排放浓度）对流经里加片多孔表面的非牛顿混合纳米流体（NNNF）的影响。研究考虑了两种不同类型的 NNNF（二级流体和 Walter's B 流体）。在基础流体海藻酸钠（C6H9NaO7）中使用了铜（Cu）和氧化铁（Fe3O4）纳米粒子（NPs）来制备混合纳米流体。NNNF 流动被设计为非线性偏微分方程（PDE）系统，通过相似性转换将其简化为无量纲形式的常微分方程，然后通过参数延续法（PCM）进行数值处理。所提模型的数值结果与已发表的极限情况文献进行了比较。本结果显示与现有研究的相似度较高。从图表结果中可以看出，流体温度随着 Cu 和 Fe3O4-NPs 的变化而下降。在外部污染物因素的影响下，两种流体中的污染物浓度都有所提高。此外，随着海藻酸钠基混合纳米流体中 Cu 和 Fe3O4-NPs 数量的增加，二级混合纳米流体的能量传递率从 3.79% 提高到 8.25%，Walter's B 混合纳米流体的能量传递率从 3.88% 提高到 9.86%。
{"title":"Wastewater Pollutant Discharge Concentration Effect on Non-Newtonian Hybrid Nanofluid Flow across a Riga Sheet: Numerical Exploration","authors":"Muhammad Bilal, Saif Ullah, Almetwally M. Mostafa, Nouf F. AlQahtani, Shuo Li","doi":"10.1615/jpormedia.2024052654","DOIUrl":"https://doi.org/10.1615/jpormedia.2024052654","url":null,"abstract":"Wastewater disposal plays an important role in several sectors of industry and environmental systems. The objective of the present research is to avoid and monitor pollutants discharge in the pure water resource. For the purpose, the influence of PDC (pollutant discharge concentration) on the non-Newtonian hybrid nanofluids (NNNF) flow across a porous surface of Riga sheet is examined. The two different types of NNNF (second-grade and Walter’s B fluids) have been considered. The copper (Cu) and iron oxide (Fe3O4) nanoparticles (NPs) are used in the base fluid Sodium Alginate (C6H9NaO7) to prepare the hybrid nanofluid. The NNNF flow is designed in form of nonlinear system of partial differential equations (PDEs), which are simplified to dimensionless form of ordinary differential equations by using similarity transformation and then numerically handled through the parametric continuation method (PCM). The numerical results of the proposed model are compared with the published literature for the limiting case. The present results reveal higher similarity with the existing study. From the graphical results, it can be observed that the fluid temperature drops with the variation of Cu and Fe3O4-NPs. The influence of external pollutant factor enhances the concentration of pollutants in case of both fluids. Furthermore, the rising quantity of Cu and Fe3O4 NPs in Sodium Alginate based hybrid nanofluid, the energy transfer rate enhances form 3.79% to 8.25%, in case of Second-Grade hybrid nanofluid and 3.88% to 9.86% in case of Walter’s B hybrid nanofluid respectively.","PeriodicalId":50082,"journal":{"name":"Journal of Porous Media","volume":"69 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141153552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-01DOI: 10.1615/jpormedia.2024052247
Sepideh Zobeidi
In saturated oil reservoirs, the pressure of the reservoir is gradually reduced with production of oil, and this ultimately leads to gas production of the reservoir and formation of a gas cap. After the period of natural depletion from oil reservoirs, it is necessary to use secondary and then tertiary methods of EOR. One of the most common methods (if gas is available) is gas injection. By injecting gas, while pressure maintenance and re-pressuring to initial pressure of the reservoir, the recovery factor increases. This increase in recovery factor mainly occurs due to maintenance or increase in pressure and decrease in interfacial tension (IFT) and viscosity. In Iran, except in one of the fields where gas injection is done with the aim of miscible gas injection, other gas injection projects are done with the aim of pressure maintenance. In these projects, the proper place for injection is not taken into consideration and the gas is done in the highest part of the reservoir, the question was raised at what depth the gas injection should be done to be optimal. Therefore, one of the reservoirs in the south of Iran was selected and a feasibility study was conducted with the aim of determining the most suitable injection point. In this study, the issue of the appropriate place for gas injection from the point of view of whether it is in the gas cap, in the middle of the production column, or at near the water/oil contact has been investigated and the results have been presented. Also it is approved that the injection in saturated reservoir has more recovery factor than under saturated reservoir. Finally, injection near water/oil contact is known as the preferred option.
{"title":"A Case Study: Depth Impact on Recovery of Immiscible Gas Injection in an Iranian Undersaturated Oil Reservoir","authors":"Sepideh Zobeidi","doi":"10.1615/jpormedia.2024052247","DOIUrl":"https://doi.org/10.1615/jpormedia.2024052247","url":null,"abstract":"In saturated oil reservoirs, the pressure of the reservoir is gradually reduced with production of oil, and this ultimately leads to gas production of the reservoir and formation of a gas cap. After the period of natural depletion from oil reservoirs, it is necessary to use secondary and then tertiary methods of EOR. One of the most common methods (if gas is available) is gas injection. By injecting gas, while pressure maintenance and re-pressuring to initial pressure of the reservoir, the recovery factor increases. This increase in recovery factor mainly occurs due to maintenance or increase in pressure and decrease in interfacial tension (IFT) and viscosity.\u0000In Iran, except in one of the fields where gas injection is done with the aim of miscible gas injection, other gas injection projects are done with the aim of pressure maintenance. In these projects, the proper place for injection is not taken into consideration and the gas is done in the highest part of the reservoir, the question was raised at what depth the gas injection should be done to be optimal. Therefore, one of the reservoirs in the south of Iran was selected and a feasibility study was conducted with the aim of determining the most suitable injection point.\u0000In this study, the issue of the appropriate place for gas injection from the point of view of whether it is in the gas cap, in the middle of the production column, or at near the water/oil contact has been investigated and the results have been presented. Also it is approved that the injection in saturated reservoir has more recovery factor than under saturated reservoir. Finally, injection near water/oil contact is known as the preferred option.","PeriodicalId":50082,"journal":{"name":"Journal of Porous Media","volume":"160 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140935892","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-01DOI: 10.1615/jpormedia.2024050970
Zaid Abbas Afluk, Akil Harfash
In this article, we investigate the problem of thermosolutal convection occurring in a Brinkman-Darcy-Kelvin-Voigt fluid. This phenomenon takes place when a layer is heated from beneath while also being exposed to salt either from the upper or lower side. Both linear instability and conditional nonlinear stability analyses are applied in this study. The linear and nonlinear systems have been solved using Chebyshev collocation technique and the QZ algorithm. The computation of instability boundaries is undertaken for the occurrence of thermosolutal convection in a fluid containing dissolved salt, where the fluid is of a complex viscoelastic nature resembling the Navier-Stokes-Voigt type. Notably, the Kelvin-Voigt parameter emerges as a critical factor in maintaining stability, particularly for oscillatory convection. In instances where the layer is heated from below and salted from above, the thresholds of stability align with those of instability, substantiating the appropriateness of the linear theory in predicting the thresholds for convection initiation. Conversely, when the layer is subjected to salting from the bottom while being heated, the thresholds of stability remain constant even with variations in the salt Rayleigh number. This leads to a significant disparity between the thresholds of linear instability and those of nonlinear stability.
{"title":"Instability of thermosolutal convection in a Brinkman-Darcy-Kelvin-Voigt fluid","authors":"Zaid Abbas Afluk, Akil Harfash","doi":"10.1615/jpormedia.2024050970","DOIUrl":"https://doi.org/10.1615/jpormedia.2024050970","url":null,"abstract":"In this article, we investigate the problem of thermosolutal convection occurring in a Brinkman-Darcy-Kelvin-Voigt fluid. This phenomenon takes place when a layer is heated from beneath while also being exposed to salt either from the upper or lower side. Both linear instability and conditional nonlinear stability analyses are applied in this study. The linear and nonlinear systems have been solved using Chebyshev collocation technique and the QZ algorithm. The computation of instability boundaries is undertaken for the occurrence of thermosolutal convection in a fluid containing dissolved salt, where the fluid is of a complex viscoelastic nature resembling the Navier-Stokes-Voigt type. Notably, the Kelvin-Voigt parameter emerges as a critical factor in maintaining stability, particularly for oscillatory convection. In instances where the layer is heated from below and salted from above, the thresholds of stability align with those of instability, substantiating the appropriateness of the linear theory in predicting the thresholds for convection initiation. Conversely, when the layer is subjected to salting from the bottom while being heated, the thresholds of stability remain constant even with variations in the salt Rayleigh number. This leads to a significant disparity between the thresholds of linear instability and those of nonlinear stability.","PeriodicalId":50082,"journal":{"name":"Journal of Porous Media","volume":"29 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141166128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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