Pub Date : 2021-01-01DOI: 10.1504/pcfd.2021.10042895
D. Lemonnier, D. Saury, X. Nguyen
{"title":"Coupled natural convection and radiation in a cubic cavity filled with an air - H_2O mixture in the presence of a heated obstacle","authors":"D. Lemonnier, D. Saury, X. Nguyen","doi":"10.1504/pcfd.2021.10042895","DOIUrl":"https://doi.org/10.1504/pcfd.2021.10042895","url":null,"abstract":"","PeriodicalId":54552,"journal":{"name":"Progress in Computational Fluid Dynamics","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66710824","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 : 2021-01-01DOI: 10.1504/PCFD.2021.10036929
Yeonwon Lee, Hyunjong Kim, Parthasarathy Nanjundan
{"title":"Numerical study on the sloshing flows in a prismatic tank using natural frequency of the prismatic shapes","authors":"Yeonwon Lee, Hyunjong Kim, Parthasarathy Nanjundan","doi":"10.1504/PCFD.2021.10036929","DOIUrl":"https://doi.org/10.1504/PCFD.2021.10036929","url":null,"abstract":"","PeriodicalId":54552,"journal":{"name":"Progress in Computational Fluid Dynamics","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66710842","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 : 2021-01-01DOI: 10.1504/PCFD.2021.10037989
A. Guaily, Ahmed Elhanafy, A. Elsaid
{"title":"Numerical simulation of viscoelastic blood flow with hematocrit variation in an arterial segment with two aneurysms","authors":"A. Guaily, Ahmed Elhanafy, A. Elsaid","doi":"10.1504/PCFD.2021.10037989","DOIUrl":"https://doi.org/10.1504/PCFD.2021.10037989","url":null,"abstract":"","PeriodicalId":54552,"journal":{"name":"Progress in Computational Fluid Dynamics","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66710534","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 : 2021-01-01DOI: 10.1504/pcfd.2021.10045586
M. Kasapoğlu, M. Ayhan, E. Aslan, A. Kundakcioglu
{"title":"AIRFLOW CHARACTERISTICS IN DIFFERENTLY ELEVATED SCHNEIDERIAN MEMBRANES: A COMPUTATIONAL FLUID DYNAMICS ANALYSIS","authors":"M. Kasapoğlu, M. Ayhan, E. Aslan, A. Kundakcioglu","doi":"10.1504/pcfd.2021.10045586","DOIUrl":"https://doi.org/10.1504/pcfd.2021.10045586","url":null,"abstract":"","PeriodicalId":54552,"journal":{"name":"Progress in Computational Fluid Dynamics","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66710881","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 : 2021-01-01DOI: 10.1504/PCFD.2021.10036934
J. M. F. Oro
: Scale-resolving simulations, like LES modelling, are recent CFD techniques to analyse numerically unsteady flows and turbulence in turbomachinery. Despite their high computational costs, they provide an unsteady, time-resolved solution of the flow with embedded turbulent scales that requires an additional statistical description. This paper provides the mathematical formulation required to compute and assure its periodic convergence, updating the phase-averaged values and the residual on the run, so the amount of data to be stored is extremely reduced. The formulation, applied over a numerical database of a wall-modelled LES simulation of the rotor-stator interaction in a low-speed axial fan using a 3D linear cascade model, reveals that primary flow variables converge faster than turbulent structures due to inherent instabilities of the coherent flow vortices. This work forms part of the concept of co-processing, where some post-processing routines are resolved during the iterative process of CFD simulations to save computational costs. University of Oviedo with the thesis dissertation entitled ‘Unsteady rotor-stator interaction in a low-speed axial flow fan’ (2005). His current research activities are mainly focused on: 1) the analysis and description of turbulence and unsteady flows in turbomachinery; 2) the development and application of measurement and visualisation techniques in experimental fluid mechanics; 3) CFD modelling and numerical simulation of fluid machinery.
{"title":"Mathematical formulation for the analysis of the periodic convergence during co-processing routines in long-run, scale-resolving simulations of turbomachinery","authors":"J. M. F. Oro","doi":"10.1504/PCFD.2021.10036934","DOIUrl":"https://doi.org/10.1504/PCFD.2021.10036934","url":null,"abstract":": Scale-resolving simulations, like LES modelling, are recent CFD techniques to analyse numerically unsteady flows and turbulence in turbomachinery. Despite their high computational costs, they provide an unsteady, time-resolved solution of the flow with embedded turbulent scales that requires an additional statistical description. This paper provides the mathematical formulation required to compute and assure its periodic convergence, updating the phase-averaged values and the residual on the run, so the amount of data to be stored is extremely reduced. The formulation, applied over a numerical database of a wall-modelled LES simulation of the rotor-stator interaction in a low-speed axial fan using a 3D linear cascade model, reveals that primary flow variables converge faster than turbulent structures due to inherent instabilities of the coherent flow vortices. This work forms part of the concept of co-processing, where some post-processing routines are resolved during the iterative process of CFD simulations to save computational costs. University of Oviedo with the thesis dissertation entitled ‘Unsteady rotor-stator interaction in a low-speed axial flow fan’ (2005). His current research activities are mainly focused on: 1) the analysis and description of turbulence and unsteady flows in turbomachinery; 2) the development and application of measurement and visualisation techniques in experimental fluid mechanics; 3) CFD modelling and numerical simulation of fluid machinery.","PeriodicalId":54552,"journal":{"name":"Progress in Computational Fluid Dynamics","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66710486","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 : 2021-01-01DOI: 10.1504/PCFD.2021.10037991
S. Tiwari, Prashant Kumar
{"title":"Effect of cross-confinement on unsteady wake characteristics of circular cylinder immersed in shear flow","authors":"S. Tiwari, Prashant Kumar","doi":"10.1504/PCFD.2021.10037991","DOIUrl":"https://doi.org/10.1504/PCFD.2021.10037991","url":null,"abstract":"","PeriodicalId":54552,"journal":{"name":"Progress in Computational Fluid Dynamics","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66710546","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 : 2021-01-01DOI: 10.1504/pcfd.2021.10039090
Akash Chandrabhan Chandekar, B. Debnath
{"title":"Computational Analysis of Mixing Characteristics of Port-Injected BioCNG with Air for Different Designs of Intake Manifold","authors":"Akash Chandrabhan Chandekar, B. Debnath","doi":"10.1504/pcfd.2021.10039090","DOIUrl":"https://doi.org/10.1504/pcfd.2021.10039090","url":null,"abstract":"","PeriodicalId":54552,"journal":{"name":"Progress in Computational Fluid Dynamics","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66710627","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 : 2021-01-01DOI: 10.1504/pcfd.2021.10039615
N. Nandi, P. Dutta
{"title":"Numerical analysis on the development of vortex structure in 90° pipe bend","authors":"N. Nandi, P. Dutta","doi":"10.1504/pcfd.2021.10039615","DOIUrl":"https://doi.org/10.1504/pcfd.2021.10039615","url":null,"abstract":"","PeriodicalId":54552,"journal":{"name":"Progress in Computational Fluid Dynamics","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66710731","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 : 2021-01-01DOI: 10.1504/pcfd.2021.10042806
Dirk Roekaerts, Barry Zandbergen, B. Pál
: This study investigates the potential of a newly released multi-phase solver to simulate atomization in an air-blast type atomizer. The "VOF-to-DPM" solver was used to simulate primary and secondary atomization in an atomizer with a coaxial injector-like geometry. The solver uses a hybrid Eulerian/Eulerian-Lagrangian formulation with geometric transition criteria between the two models. The conducted study assumed isothermal, non-reacting flow at room temperature. The primary focus was predicting Sauter Mean Diameter and droplet velocity data at a sampling plane downstream of the injection site. The results showed that the solver is able to produce the expected data and to predict trends similar to those found in experimental measurements. The accuracy of the produced droplet diameters was roughly a factor 2 off compared to experiment. This is attributed primarily to mesh resolution. It was concluded that the solver has the potential to predict atomization at a reasonable computational cost, but further study is needed to confirm its full capabilities.
{"title":"Numerical investigation of atomisation using a hybrid Eulerian-Lagrangian solver","authors":"Dirk Roekaerts, Barry Zandbergen, B. Pál","doi":"10.1504/pcfd.2021.10042806","DOIUrl":"https://doi.org/10.1504/pcfd.2021.10042806","url":null,"abstract":": This study investigates the potential of a newly released multi-phase solver to simulate atomization in an air-blast type atomizer. The \"VOF-to-DPM\" solver was used to simulate primary and secondary atomization in an atomizer with a coaxial injector-like geometry. The solver uses a hybrid Eulerian/Eulerian-Lagrangian formulation with geometric transition criteria between the two models. The conducted study assumed isothermal, non-reacting flow at room temperature. The primary focus was predicting Sauter Mean Diameter and droplet velocity data at a sampling plane downstream of the injection site. The results showed that the solver is able to produce the expected data and to predict trends similar to those found in experimental measurements. The accuracy of the produced droplet diameters was roughly a factor 2 off compared to experiment. This is attributed primarily to mesh resolution. It was concluded that the solver has the potential to predict atomization at a reasonable computational cost, but further study is needed to confirm its full capabilities.","PeriodicalId":54552,"journal":{"name":"Progress in Computational Fluid Dynamics","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66710813","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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