Pub Date : 2024-01-01DOI: 10.1615/jpormedia.2024050262
Shyamala Sakthivel, Pankaj Shukla, Selvi Ramasamy
This problem emphasizes the dynamic interaction between a biporous medium and a couple stress fluid of laminar flow. The flow around a permeable field engulfed in a couple stress fluid is examined. When examining the motion of an oil droplet in a porous collector that is surrounded by an aqueous medium (oil-in-water emulsion) and is subject to an external pressure drop, this formulation of the problem is typical. A similar issue arises when lymph enters the tissues of humans or animals: the inside permeable spherical field saturated with viscous fluid and outside region saturated with couple stress fluid. The Brinkman equations are utilized to characterize the couple stress fluid flow in a saturated biporous medium. The couple stress tensor and velocity fields are expressed using Gegenbauer polynomials and Macdonald functions. For the axially symmetric motion, both pressure distribution and the stream function solution are explicitly solved. The method of variable separation is used to investigate an analytical resoluteness for the flow field. The drag force on a saturated biporous medium and the drag coefficient DN are calculated, and the impacts of the permeability κ, the ratio of viscosity (γ2 = μ1 /μ2), the couple stress viscosity ratio (τ = η'/η), and the parameter of couple stress (λ = √μ/η). The appropriate dependencies are graphically delineated and reviewed, including the permeability κ, couple stress parameter λ, viscosity ratio γ2, and couple stress viscosities (η, η'). According to the findings, increasing permeability gradually raises the drag coefficient, which is used to describe a spherical field’s surface with a high level resistance of flow. Limits statements are used to illustrate specific cases that are well-known. The current study is significant primarily in the course through a layer formed by penetrable particles and has very important and compelling applications in both nature and innovation, with a variety of potential outcomes.
{"title":"CREEPING FLOW OF COUPLE STRESS FLUID OVER A SPHERICAL FIELD ON A SATURATED BIPOROUS MEDIUM","authors":"Shyamala Sakthivel, Pankaj Shukla, Selvi Ramasamy","doi":"10.1615/jpormedia.2024050262","DOIUrl":"https://doi.org/10.1615/jpormedia.2024050262","url":null,"abstract":"This problem emphasizes the dynamic interaction between a biporous medium and a couple stress fluid of laminar flow. The flow around a permeable field engulfed in a couple stress fluid is examined. When examining the motion of an oil droplet in a porous collector that is surrounded by an aqueous medium (oil-in-water emulsion) and is subject to an external pressure drop, this formulation of the problem is typical. A similar issue arises when lymph enters the tissues of humans or animals: the inside permeable spherical field saturated with viscous fluid and outside region saturated with couple stress fluid. The Brinkman equations are utilized to characterize the couple stress fluid flow in a saturated biporous medium. The couple stress tensor and velocity fields are expressed using Gegenbauer polynomials and Macdonald functions. For the axially symmetric motion, both pressure distribution and the stream function solution are explicitly solved. The method of variable separation is used to investigate an analytical resoluteness for the flow field. The drag force on a saturated biporous medium and the drag coefficient <i>D<sub>N</sub></i> are calculated, and the impacts of the permeability κ, the ratio of viscosity (γ<sup>2</sup> = μ<sub>1</sub> /μ<sub>2</sub>), the couple stress viscosity ratio (τ = η'/η), and the parameter of couple stress (λ = √μ/η). The appropriate dependencies are graphically delineated and reviewed, including the permeability κ, couple stress parameter λ, viscosity ratio γ<sup>2</sup>, and couple stress viscosities (η, η'). According to the findings, increasing permeability gradually raises the drag coefficient, which is used to describe a spherical field’s surface with a high level resistance of flow. Limits statements are used to illustrate specific cases that are well-known. The current study is significant primarily in the course through a layer formed by penetrable particles and has very important and compelling applications in both nature and innovation, with a variety of potential outcomes.","PeriodicalId":50082,"journal":{"name":"Journal of Porous Media","volume":"16 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140047684","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 : 2024-01-01DOI: 10.1615/jpormedia.2024049980
Arpan Garg, Y.D. Sharma, Subit K. Jain, Sanjalee Maheshwari
This paper accommodates numerical investigation on the onset of magneto-thermo-bioconvection in nanofluid suspension of gyrotactic microbes saturated in a porous medium under the imposition of vertical throughflow and quadratic drag. The modified Darcy-Brinkman-Forchheimer model is utilized to drive the governing equations. The normal mode technique along with linear stability analysis is imposed to establish the agitated system of equations. An eight-order Galerkin methodology is utilized to numerically extract the critical thermal Rayleigh number values from the tedious eigenvalue problem. The power of vertical throughflow and quadratic drag is perceived to enhance the thermal energy transfer and stabilize the nanofluid suspension that consequently tries to restrict the convective process. The intensity of the magnetic field is identified to delay the onset of magneto-thermo-bioconvection. It is also found that the presence of fast-moving gyrotactic microorganisms and top-heavy nanofluid concentration form an unstable system to accelerate the beginning of the magneto-thermo-bioconvection. The outcome of this work may find applications in microfluidic devices, enhanced oil recovery, and many other areas for controlling the speed of the convective process.
{"title":"Numerical study of the influence of magnetic field and throughflow on the onset of thermo-bio-convection in a Forchheimer‑extended Darcy-Brinkman porous nanofluid layer containing gyrotactic microorganisms","authors":"Arpan Garg, Y.D. Sharma, Subit K. Jain, Sanjalee Maheshwari","doi":"10.1615/jpormedia.2024049980","DOIUrl":"https://doi.org/10.1615/jpormedia.2024049980","url":null,"abstract":"This paper accommodates numerical investigation on the onset of magneto-thermo-bioconvection in nanofluid suspension of gyrotactic microbes saturated in a porous medium under the imposition of vertical throughflow and quadratic drag. The modified Darcy-Brinkman-Forchheimer model is utilized to drive the governing equations. The normal mode technique along with linear stability analysis is imposed to establish the agitated system of equations. An eight-order Galerkin methodology is utilized to numerically extract the critical thermal Rayleigh number values from the tedious eigenvalue problem. The power of vertical throughflow and quadratic drag is perceived to enhance the thermal energy transfer and stabilize the nanofluid suspension that consequently tries to restrict the convective process. The intensity of the magnetic field is identified to delay the onset of magneto-thermo-bioconvection. It is also found that the presence of fast-moving gyrotactic microorganisms and top-heavy nanofluid concentration form an unstable system to accelerate the beginning of the magneto-thermo-bioconvection. The outcome of this work may find applications in microfluidic devices, enhanced oil recovery, and many other areas for controlling the speed of the convective process.","PeriodicalId":50082,"journal":{"name":"Journal of Porous Media","volume":"37 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139582960","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 : 2024-01-01DOI: 10.1615/jpormedia.2024050696
Noura Alsedais, Sang-Wook Lee, Abdelraheem Aly
Numerical investigations were conducted on the bioconvection flow of nano-encapsulated phase change materials with oxytactic microorganisms in a circular annulus with a rotating wavy inner cylinder. The incompressible smoothed particle hydrodynamics method was applied to solve the governing partial differential equations for the velocity, temperature, concentration, and density of motile microorganisms. Compared with the conventional mesh–based method, this mesh-free, particle-based approach offers strong advantages in the simulation of complex problems with free surfaces and moving boundaries with large displacements. The pertinent parameters are the undulation number (N_und = 2-36), bioconvection Rayleigh number (〖Ra〗_b = 1-1000), Darcy parameter (Da = 10^(-5)-10^(-2)), length of the inner fin (L_Fin = 0.05-0.15), radius of the inner wavy cylinder (R_c = 0.05-0.25), Rayleigh number (Ra = 10^3-10^5), undulation amplitude of the inner wavy cylinder surface (A = 0.1-0.4), and frequency parameter (ω = 1-5). The results showed that the undulation number of the inner wavy cylinder enhanced the flow of the oxytactic microorganisms and isotherms, whereas it had the reverse effect on the velocity, decreasing the maximum velocity by 26.56%. In addition, the comparatively high undulation amplitude and frequency increased the average Nusselt and Sherwood numbers. It was found that the embedded wavy cylinder interacting with fins plays an important role in enhancing heat transfer and the bioconvection flow within a closed domain.
{"title":"ROTATING WAVY CYLINDER ON BIOCONVECTION FLOW OF NANOENCAPSULATED PHASE CHANGE MATERIALS IN A FINNED CIRCULAR CYLINDER","authors":"Noura Alsedais, Sang-Wook Lee, Abdelraheem Aly","doi":"10.1615/jpormedia.2024050696","DOIUrl":"https://doi.org/10.1615/jpormedia.2024050696","url":null,"abstract":"Numerical investigations were conducted on the bioconvection flow of nano-encapsulated phase change materials with oxytactic microorganisms in a circular annulus with a rotating wavy inner cylinder. The incompressible smoothed particle hydrodynamics method was applied to solve the governing partial differential equations for the velocity, temperature, concentration, and density of motile microorganisms. Compared with the conventional mesh–based method, this mesh-free, particle-based approach offers strong advantages in the simulation of complex problems with free surfaces and moving boundaries with large displacements. The pertinent parameters are the undulation number (N_und = 2-36), bioconvection Rayleigh number (〖Ra〗_b = 1-1000), Darcy parameter (Da = 10^(-5)-10^(-2)), length of the inner fin (L_Fin = 0.05-0.15), radius of the inner wavy cylinder (R_c = 0.05-0.25), Rayleigh number (Ra = 10^3-10^5), undulation amplitude of the inner wavy cylinder surface (A = 0.1-0.4), and frequency parameter (ω = 1-5). The results showed that the undulation number of the inner wavy cylinder enhanced the flow of the oxytactic microorganisms and isotherms, whereas it had the reverse effect on the velocity, decreasing the maximum velocity by 26.56%. In addition, the comparatively high undulation amplitude and frequency increased the average Nusselt and Sherwood numbers. It was found that the embedded wavy cylinder interacting with fins plays an important role in enhancing heat transfer and the bioconvection flow within a closed domain.","PeriodicalId":50082,"journal":{"name":"Journal of Porous Media","volume":"212 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139561722","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 : 2024-01-01DOI: 10.1615/jpormedia.2024050229
Abdelaziz Nasr
A numerical analysis of the falling nanofilm evaporation on a vertical porous wetted wall by mixed convection was performed. The right-wall was dry and isothermal, while the left wall is embedded in a non-Darcy porous medium filled with nanofilm (water+low fraction volume of copper nanoparticles) and exposed to a uniform heat flux from the outside. The nanofluid film makes up the liquid, while dry air and water vapor comprise the gas mixture. The results obtained from this study pertain to the impact of porosity, thickness of the porous layer, concentration of nanoparticles on heat and mass exchange, and liquid film evaporation. The results indicate that mass and heat exchange, as well as liquid film evaporation, are improved in the case of nanofilm by introducing a liquid-saturated porous medium. It is shown that in the case of a porous layer, the dispersion of the nanoparticles into water film ameliorates the liquid film evaporation of the plate evaporator and weakly improves the mass and heat exchange.
{"title":"Water nanofluid falling film on a Non-Darcy porous vertical plate evaporator","authors":"Abdelaziz Nasr","doi":"10.1615/jpormedia.2024050229","DOIUrl":"https://doi.org/10.1615/jpormedia.2024050229","url":null,"abstract":"A numerical analysis of the falling nanofilm evaporation on a vertical porous wetted wall by mixed convection was performed. The right-wall was dry and isothermal, while the left wall is embedded in a non-Darcy porous medium filled with nanofilm (water+low fraction volume of copper nanoparticles) and exposed to a uniform heat flux from the outside. The nanofluid film makes up the liquid, while dry air and water vapor comprise the gas mixture. The results obtained from this study pertain to the impact of porosity, thickness of the porous layer, concentration of nanoparticles on heat and mass exchange, and liquid film evaporation. The results indicate that mass and heat exchange, as well as liquid film evaporation, are improved in the case of nanofilm by introducing a liquid-saturated porous medium. It is shown that in the case of a porous layer, the dispersion of the nanoparticles into water film ameliorates the liquid film evaporation of the plate evaporator and weakly improves the mass and heat exchange.","PeriodicalId":50082,"journal":{"name":"Journal of Porous Media","volume":"13 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139474636","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 : 2024-01-01DOI: 10.1615/jpormedia.2024049270
Mustafa Yasin Gökaslan, Mustafa Özdemir, Lütfullah Kuddusi
Packed beds are used in many fields such as heat exchangers, cooling systems, filtration, and reactors. Porous media increase the heat transfer but increase the pressure drop and flow regimes are different according to the clear channel. The flow regime significantly affects the heat transfer and pumping power of the fluid. It is known that when the channel is either curved or packed separately, the pressure drop increases. There are many studies on pressure drop and flow regimes in porous media or curvilinear channels. However, there are not many studies on pressure drop and flow regimes in a curvilinear packed bed. In this work, the pressure drops and flow regimes were determined when the channel is both curved and porous media. The packed beds were formed with two different radii of curvature, 71 and 171 mm in diameter, and are filled from steel balls with different particle diameters of 2.00, 2.38 mm, and 3.17 mm. The pressure drop in these spiral porous media was measured experimentally and flow regimes were determined for each test chamber and ball diameter. In each flow regime, permeabilities, Forchheimer coefficients, and the coefficients corresponding to Ergün constants were calculated. The effect of the curvature ratio was interpreted as the difference from the straight packed beds. Determining the flow regime ranges of curved packed beds, it can help to better interpret the heat transfer and pumping power of the fluid in these regimes
{"title":"Characteristics of Flow Regimes in Spiral Packed Beds Composed of Randomly Spheres","authors":"Mustafa Yasin Gökaslan, Mustafa Özdemir, Lütfullah Kuddusi","doi":"10.1615/jpormedia.2024049270","DOIUrl":"https://doi.org/10.1615/jpormedia.2024049270","url":null,"abstract":"Packed beds are used in many fields such as heat exchangers, cooling systems, filtration, and reactors. Porous media increase the heat transfer but increase the pressure drop and flow regimes are different according to the clear channel. The flow regime significantly affects the heat transfer and pumping power of the fluid. It is known that when the channel is either curved or packed separately, the pressure drop increases. There are many studies on pressure drop and flow regimes in porous media or curvilinear channels. However, there are not many studies on pressure drop and flow regimes in a curvilinear packed bed. In this work, the pressure drops and flow regimes were determined when the channel is both curved and porous media. The packed beds were formed with two different radii of curvature, 71 and 171 mm in diameter, and are filled from steel balls with different particle diameters of 2.00, 2.38 mm, and 3.17 mm. The pressure drop in these spiral porous media was measured experimentally and flow regimes were determined for each test chamber and ball diameter. In each flow regime, permeabilities, Forchheimer coefficients, and the coefficients corresponding to Ergün constants were calculated. The effect of the curvature ratio was interpreted as the difference from the straight packed beds. Determining the flow regime ranges of curved packed beds, it can help to better interpret the heat transfer and pumping power of the fluid in these regimes","PeriodicalId":50082,"journal":{"name":"Journal of Porous Media","volume":"86 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139648141","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}
In this research, we are delving into the intricate interplay of Casson fluid flow around a shrinking cylinder while considering the existence of a porous medium. This system is further influenced by magnetohydrodynamics (MHD), radiation, and heat generation. A distinctive aspect of novelty in this investigation involves incorporating a suction effect into the boundary condition. By converting the resulting set of nonlinear partial differential equations into ordinary differential equations, we employ the bvp4c solver, which makes use of the Runge-Kutta method, to achieve numerical solutions. This numerical technique enables us to simulate and examine the complex patterns of fluid flow, temperature distribution, and velocity profiles that arise from the combined impacts of Casson fluid behavior, porous medium, MHD, radiation, and heat generation. The presence of the porous medium brings about alterations in velocity profiles and heat transfer within the system. The numerical methodology introduced here serves to showcase the capabilities of the bvp4c solver in conjunction with the Runge-Kutta method, particularly when addressing challenging Multiphysics problems involving Casson fluid behavior, porous media, MHD, radiation, and heat generation. The key findings of this research indicate that an increase in the Casson fluid parameter and the suction effect leads to a reduction in skin friction. Moreover, higher values of radiation are associated with a decrease in the Nusselt number profile.
{"title":"Porosity Impacts on MHD Casson Fluid past a Shrinking Cylinder with Suction","authors":"Annuri Shobha, Murugan Mageswari, Aisha M. Alqahtani, Asokan Arulmozhi, Manyala Gangadhar Rao, Sudar Mozhi K, Ilyas Khan","doi":"10.1615/jpormedia.2024050282","DOIUrl":"https://doi.org/10.1615/jpormedia.2024050282","url":null,"abstract":"In this research, we are delving into the intricate interplay of Casson fluid flow around a shrinking cylinder while considering the existence of a porous medium. This system is further influenced by magnetohydrodynamics (MHD), radiation, and heat generation. A distinctive aspect of novelty in this investigation involves incorporating a suction effect into the boundary condition. By converting the resulting set of nonlinear partial differential equations into ordinary differential equations, we employ the bvp4c solver, which makes use of the Runge-Kutta method, to achieve numerical solutions. This numerical technique enables us to simulate and examine the complex patterns of fluid flow, temperature distribution, and velocity profiles that arise from the combined impacts of Casson fluid behavior, porous medium, MHD, radiation, and heat generation. The presence of the porous medium brings about alterations in velocity profiles and heat transfer within the system. The numerical methodology introduced here serves to showcase the capabilities of the bvp4c solver in conjunction with the Runge-Kutta method, particularly when addressing challenging Multiphysics problems involving Casson fluid behavior, porous media, MHD, radiation, and heat generation. The key findings of this research indicate that an increase in the Casson fluid parameter and the suction effect leads to a reduction in skin friction. Moreover, higher values of radiation are associated with a decrease in the Nusselt number profile.","PeriodicalId":50082,"journal":{"name":"Journal of Porous Media","volume":"55 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139510227","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 : 2024-01-01DOI: 10.1615/jpormedia.2024048602
A. B. Vishalakshi, U.S. Mahabaleshwar, V. Anitha, Dia Zeidan
The analysis of current work portrays the exact solution of couple stress fluid flow with heat transfer. Three variety of nanoparticles are placed inside the flow to achieve better thermal conductivity. Porous sheet inside the fluid flow is considered to yield new results of the study. With the use of similarity variables, the controlling PDEs of the issue are converted into ODEs. Analytical analysis is used to determine the domain and solution of the momentum and energy equations in terms of the Laguerre polynomial. In addition, skin friction and Nusselt number is also verified using non-dimensional different controlling parameters like thermal radiation (R), couple stress fluid parameter (C) , solid volume fractions (∅) , mass transpiration (Vc) and so on, to verify the results of the present work. Present work is very well argument with previously published paper and also it containing many industrial applications namely entropy generation, polymer production, automotive cooling system and microelectronics.
{"title":"A nanofluid couple stress flow due to porous stretching and shrinking sheet with heat transfer","authors":"A. B. Vishalakshi, U.S. Mahabaleshwar, V. Anitha, Dia Zeidan","doi":"10.1615/jpormedia.2024048602","DOIUrl":"https://doi.org/10.1615/jpormedia.2024048602","url":null,"abstract":"The analysis of current work portrays the exact solution of couple stress fluid flow with heat transfer. Three variety of nanoparticles are placed inside the flow to achieve better thermal conductivity. Porous sheet inside the fluid flow is considered to yield new results of the study. With the use of similarity variables, the controlling PDEs of the issue are converted into ODEs. Analytical analysis is used to determine the domain and solution of the momentum and energy equations in terms of the Laguerre polynomial. In addition, skin friction and Nusselt number is also verified using non-dimensional different controlling parameters like thermal radiation (R), couple stress fluid parameter (C) , solid volume fractions (∅) , mass transpiration (Vc) and so on, to verify the results of the present work. Present work is very well argument with previously published paper and also it containing many industrial applications namely entropy generation, polymer production, automotive cooling system and microelectronics.","PeriodicalId":50082,"journal":{"name":"Journal of Porous Media","volume":"125 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139561658","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 : 2024-01-01DOI: 10.1615/jpormedia.2024052188
Liu Yang, Zhengyan Zhang, Huijin Xu, Jingwei Gao
The argillaceous siltstone reservoirs in South China Sea involves a wide variety of fossil resources, such as gas hydrate, marine oil, natural gas, and other mineral resources. The argillaceous siltstone with mixed wettability characteristics is easily dispersed in water, and it is difficult to study the wettability of argillaceous siltstone based on water imbibition technique. In this work, an innovative method is proposed to demonstrate the mixed wettability based on imbibition and nuclear magnetic resonance (NMR) technique. The contact angle results show that the affinity of argillaceous siltstone for oil is stronger than that for water. However, the imbibition volume of water is much larger than that of oil. The oil imbibition curve is linear, while water imbibition curve has a two-stage feature. This difference can be explained by the expansion of clay, where more water wet surfaces are exposed to the liquid, leading to changes in wettability. In addition, the coexistence of organic matter and inorganic clay minerals results in a mixed wetting characteristic. Based on NMR technology, a micro wettability index is proposed to quantitatively characterize the micro wettability heterogeneity. The micro water (or oil) wettability index of micropores (0.01−10 ms) is approximately equal to 0.5, indicating the mixed wettability. The micro water wettability index of mesopores (10−500 ms) is approximately equal to 1.0, indicating strong water wettability. These pores or cracks may be induced by clay minerals expansion. The micro oil wettability index of macropores (> 500 ms) is approximately equal to 1.0, indicating strong oil wettability, which is resulted from significant accumulation of organic debris enrichment. It is of great significance to improve the exploration and exploitation efficiency of mineral resources in the South China Sea.
{"title":"EXPLORING THE WETTABILITY CHARACTERISTICS OF ARGILLACEOUS SILTSTONE WITH IMBIBITION AND NMR TECHNIQUE FOR MARINE RESERVOIR EXPLOITATION","authors":"Liu Yang, Zhengyan Zhang, Huijin Xu, Jingwei Gao","doi":"10.1615/jpormedia.2024052188","DOIUrl":"https://doi.org/10.1615/jpormedia.2024052188","url":null,"abstract":"The argillaceous siltstone reservoirs in South China Sea involves a wide variety of fossil resources, such as gas hydrate, marine oil, natural gas, and other mineral resources. The argillaceous siltstone with mixed wettability characteristics is easily dispersed in water, and it is difficult to study the wettability of argillaceous siltstone based on water imbibition technique. In this work, an innovative method is proposed to demonstrate the mixed wettability based on imbibition and nuclear magnetic resonance (NMR) technique. The contact angle results show that the affinity of argillaceous siltstone for oil is stronger than that for water. However, the imbibition volume of water is much larger than that of oil.\u0000The oil imbibition curve is linear, while water imbibition curve has a two-stage feature. This difference can be explained by the expansion of clay, where more water wet surfaces are exposed to the liquid, leading to changes in wettability. In addition, the coexistence of organic matter and inorganic clay minerals results in a mixed wetting characteristic. Based on NMR technology, a micro wettability index is proposed to quantitatively characterize the micro wettability heterogeneity. The micro water (or oil) wettability index of micropores (0.01−10 ms) is approximately equal to 0.5, indicating the mixed wettability. The micro water wettability index of mesopores (10−500 ms) is approximately equal\u0000to 1.0, indicating strong water wettability. These pores or cracks may be induced by clay minerals expansion. The\u0000micro oil wettability index of macropores (> 500 ms) is approximately equal to 1.0, indicating strong oil wettability, which is resulted from significant accumulation of organic debris enrichment. It is of great significance to improve the exploration and exploitation efficiency of mineral resources in the South China Sea.","PeriodicalId":50082,"journal":{"name":"Journal of Porous Media","volume":"38 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141502225","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 : 2024-01-01DOI: 10.1615/jpormedia.2024051713
Zafar Mahmood, Khadija Rafique, Umar Khan, Taseer Muhammad, Ahmed Hassan
Hybrid nanofluids' enhanced thermal efficiency has important applications in many fields of industry and engineering. So, the goal of this study is to find out how different thermal conductivity models affect important factors in the Darcy-Forchheimer flow and heat transfer of a hybrid nanofluid made of 〖Al〗_2 O_3-Cu and water across a moving surface that can let some fluid pass through it. Magnetohydrodynamics (MHD), thermal radiation, joule heating, and viscous dissipation are all included in the study. Partial differential equations (PDEs) are made more manageable by reducing them to a set of ordinary differential equations (ODEs) via a similarity transformation. After that, Mathematica's shooting technique and the Runge-Kutta algorithm are used to numerically solve these ODEs. The study analyses the effects of key factors on the major physical quantities of interest and presents the findings graphically and tabularly. The research also shows that differing thermal conductivity models lead to significantly varied average Nusselt values. The rate of heat transmission improves with the addition of ϕ_2 and S. The Xue model in the hybrid nanofluid shows a 0.7% increase in heat transfer rate compared to the nanofluid, while the Maxwell model shows a 0.64% increase, and the Yamada-Ota model shows a 1.01% increase. Importantly, for all the considered models of thermal conductivity, the research shows that the average Nusselt number increases linearly with the nanoparticle volume percentage. Finally, the data show that the Yamada-Ota model consistently produces far higher average Nusselt values than the other models.
{"title":"Importance of Thermal Conductivity Models in Analyzing Heat Transfer of Radiative Hybrid Nanofluid Across a Stretching Sheet using Darcy-Forchheimer Flow","authors":"Zafar Mahmood, Khadija Rafique, Umar Khan, Taseer Muhammad, Ahmed Hassan","doi":"10.1615/jpormedia.2024051713","DOIUrl":"https://doi.org/10.1615/jpormedia.2024051713","url":null,"abstract":"Hybrid nanofluids' enhanced thermal efficiency has important applications in many fields of industry and engineering. So, the goal of this study is to find out how different thermal conductivity models affect important factors in the Darcy-Forchheimer flow and heat transfer of a hybrid nanofluid made of 〖Al〗_2 O_3-Cu and water across a moving surface that can let some fluid pass through it. Magnetohydrodynamics (MHD), thermal radiation, joule heating, and viscous dissipation are all included in the study. Partial differential equations (PDEs) are made more manageable by reducing them to a set of ordinary differential equations (ODEs) via a similarity transformation. After that, Mathematica's shooting technique and the Runge-Kutta algorithm are used to numerically solve these ODEs. The study analyses the effects of key factors on the major physical quantities of interest and presents the findings graphically and tabularly. The research also shows that differing thermal conductivity models lead to significantly varied average Nusselt values. The rate of heat transmission improves with the addition of ϕ_2 and S. The Xue model in the hybrid nanofluid shows a 0.7% increase in heat transfer rate compared to the nanofluid, while the Maxwell model shows a 0.64% increase, and the Yamada-Ota model shows a 1.01% increase. Importantly, for all the considered models of thermal conductivity, the research shows that the average Nusselt number increases linearly with the nanoparticle volume percentage. Finally, the data show that the Yamada-Ota model consistently produces far higher average Nusselt values than the other models.","PeriodicalId":50082,"journal":{"name":"Journal of Porous Media","volume":"178 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139094418","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 : 2024-01-01DOI: 10.1615/jpormedia.2023050260
Vineet Kumar Verma, ABDUL FAIZ ANSARI
In the present paper, influence of the magnetic field on a viscous incompressible conducting fluid flow through an anisotropic rotating porous channel is considered. The flow within the porous channel is governed by Brinkman equation. No-slip boundary condition is used on walls of the channel. An analytical solution for the primary and secondary velocities are obtained. The influence of various parameters such as Hartmann number, Taylor number and Darcy number on the flow is discussed in the paper. Velocity and volumetric flow rate in the primary and secondary directions are exhibited graphically and in tabular form.
{"title":"DARCY-BRINKMAN FLOW IN AN ANISOTROPIC ROTATING POROUS CHANNEL UNDER THE INFLUENCE OF MAGNETIC FIELD","authors":"Vineet Kumar Verma, ABDUL FAIZ ANSARI","doi":"10.1615/jpormedia.2023050260","DOIUrl":"https://doi.org/10.1615/jpormedia.2023050260","url":null,"abstract":"In the present paper, influence of the magnetic field on a viscous incompressible conducting fluid flow through an anisotropic rotating porous channel is considered. The flow within the porous channel is governed by Brinkman equation. No-slip boundary condition is used on walls of the channel. An analytical solution for the primary and secondary velocities are obtained. The influence of various parameters such as Hartmann number, Taylor number and Darcy number on the flow is discussed in the paper. Velocity and volumetric flow rate in the primary and secondary directions are exhibited graphically and in tabular form.","PeriodicalId":50082,"journal":{"name":"Journal of Porous Media","volume":"33 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139077334","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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