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International Journal of Thermofluid Science and Technology最新文献

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Effect of viscous dissipation on the onset of jeffery fluid porous convection in the presence of throughflow and electric field 粘性耗散对存在贯通流和电场时杰弗里流体多孔对流开始的影响
International Journal of Thermofluid Science and Technology Pub Date : 2023-10-01 DOI: 10.36963/ijtst.2023100405
G. Y. H., N. H
{"title":"Effect of viscous dissipation on the onset of jeffery fluid porous convection in the presence of throughflow and electric field","authors":"G. Y. H., N. H","doi":"10.36963/ijtst.2023100405","DOIUrl":"https://doi.org/10.36963/ijtst.2023100405","url":null,"abstract":"","PeriodicalId":36637,"journal":{"name":"International Journal of Thermofluid Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139325998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Natural convection of power-law fluid in a horizontal annulus between outer cylinder and inner flat tube 外圆筒和内扁管之间的水平环形空间中的幂律流体自然对流
International Journal of Thermofluid Science and Technology Pub Date : 2023-10-01 DOI: 10.36963/ijtst.2023100402
Benhizia Oussama, B. Mohamed
{"title":"Natural convection of power-law fluid in a horizontal annulus between outer cylinder and inner flat tube","authors":"Benhizia Oussama, B. Mohamed","doi":"10.36963/ijtst.2023100402","DOIUrl":"https://doi.org/10.36963/ijtst.2023100402","url":null,"abstract":"","PeriodicalId":36637,"journal":{"name":"International Journal of Thermofluid Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139330231","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Thermo-fluidic characteristics of an aerodynamic swirl nozzle with low-concentration nanofluids 使用低浓度纳米流体的空气动力漩涡喷嘴的热流体特性
International Journal of Thermofluid Science and Technology Pub Date : 2023-10-01 DOI: 10.36963/ijtst.2023100401
MD Tanvir Khan, Sudipta Debnath, Z. U. Ahmed
{"title":"Thermo-fluidic characteristics of an aerodynamic swirl nozzle with low-concentration nanofluids","authors":"MD Tanvir Khan, Sudipta Debnath, Z. U. Ahmed","doi":"10.36963/ijtst.2023100401","DOIUrl":"https://doi.org/10.36963/ijtst.2023100401","url":null,"abstract":"","PeriodicalId":36637,"journal":{"name":"International Journal of Thermofluid Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139327964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Performance analysis of ejector refrigeration cycle with zeotropic mixtures 带有各向同性混合物的喷射器制冷循环的性能分析
International Journal of Thermofluid Science and Technology Pub Date : 2023-10-01 DOI: 10.36963/ijtst.2023100404
Mohammed Mehemmai, H. Grine, Hakim Madani, C. Bougriou
{"title":"Performance analysis of ejector refrigeration cycle with zeotropic mixtures","authors":"Mohammed Mehemmai, H. Grine, Hakim Madani, C. Bougriou","doi":"10.36963/ijtst.2023100404","DOIUrl":"https://doi.org/10.36963/ijtst.2023100404","url":null,"abstract":"","PeriodicalId":36637,"journal":{"name":"International Journal of Thermofluid Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139324945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Evaluation of conventional fluid mechanic theory in small channels with singularity 在有奇点的小通道中评估传统流体力学理论
International Journal of Thermofluid Science and Technology Pub Date : 2023-10-01 DOI: 10.36963/ijtst.2023100403
Sid Ali Si Salah, Abdelwahid Azzi, E. Filali
{"title":"Evaluation of conventional fluid mechanic theory in small channels with singularity","authors":"Sid Ali Si Salah, Abdelwahid Azzi, E. Filali","doi":"10.36963/ijtst.2023100403","DOIUrl":"https://doi.org/10.36963/ijtst.2023100403","url":null,"abstract":"","PeriodicalId":36637,"journal":{"name":"International Journal of Thermofluid Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139330191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Blood flow transport with electrokinetic flow technique through a narrow semicircle shape within the vertical 2D asymmetrical model 在垂直二维非对称模型中，采用电动流技术通过窄半圆的血流传输
International Journal of Thermofluid Science and Technology Pub Date : 2023-08-01 DOI: 10.36963/ijtst.2023100303
Suwimon Saneewong Na Ayuttaya
{"title":"Blood flow transport with electrokinetic flow technique through a narrow semicircle shape within the vertical 2D asymmetrical model","authors":"Suwimon Saneewong Na Ayuttaya","doi":"10.36963/ijtst.2023100303","DOIUrl":"https://doi.org/10.36963/ijtst.2023100303","url":null,"abstract":"Within the vertical 2-Dimensional (2D) asymmetrical model, the blood flow transport through a narrow semicircle shape is the numerical study based on the concept of the electrokinetic flow technique. In this study, the blood flow transport has been compared to the electric field, the flow pattern, the pressure field, the vorticity, the temperature field, and the concentration field with and without the electrokinetic flow. The electrical voltage and time are varied from 0 – 20 kV and 0 – 1 s, respectively. The result has shown that the blood flow transport is moved upward within the vertical 2D asymmetrical model and the electric field has not appeared in the case of without the electrokinetic flow. With the electrokinetic flow, the flow pattern, the pressure field, the vorticity field, the temperature field, and the concentration field are not the same pattern as the electric field but they are induced by the electric field. Furthermore, at the center of a narrow semicircle shape, the electric value, the velocity, and the pressure are increased with the electrical voltage increasing but the vorticity and concentration are decreased with the electrical voltage increasing. Finally, the experimental result is compared with the numerical result, it can be seen that simulation results had good agreement with experiment results.","PeriodicalId":36637,"journal":{"name":"International Journal of Thermofluid Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41978779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Finite element analysis for electro-osmotic Erying-Powell fluid flow past a stretching sheet with an exponential heat source - an ANN approach 带指数热源的电渗透叶灵-鲍威尔流体通过拉伸板的有限元分析-一种人工神经网络方法
International Journal of Thermofluid Science and Technology Pub Date : 2023-07-01 DOI: 10.36963/ijtst.2023100301
S. Ramprasad, Nagabhushana Pulla, Y. S. Kalyan Chakravarthy
{"title":"Finite element analysis for electro-osmotic Erying-Powell fluid flow past a stretching sheet with an exponential heat source - an ANN approach","authors":"S. Ramprasad, Nagabhushana Pulla, Y. S. Kalyan Chakravarthy","doi":"10.36963/ijtst.2023100301","DOIUrl":"https://doi.org/10.36963/ijtst.2023100301","url":null,"abstract":"This paper gives the numerical analysis for an electro-osmotic Eyring-Powell fluid flow that is in two dimensions along a stretched sheet. The modified governing equations are resolved by the finite element technique. Graphs are used to display the various properties for several relevant factors on dimensionless velocity and temperature fields. The results are compared with previous findings in order to confirm the accuracy of the numerical solution. There appears to be a decrease in velocity when the magnetic parameter and Eckret number increase. This study has implications for fluidization, environmental pollutants, and agriculture. In this study, computational fluid dynamics (CFD) simulations and an artificial neural network (ANN) model are both employed.","PeriodicalId":36637,"journal":{"name":"International Journal of Thermofluid Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46442430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Free convection of hybrid water/aluminum oxide-copper nanofluid in cubic cavity 水/氧化铝-铜混合纳米流体在立方腔内的自由对流
International Journal of Thermofluid Science and Technology Pub Date : 2023-07-01 DOI: 10.36963/ijtst.2023100203
Dayf Abdellatif, Feddaoui M’barek, Bouchta Said, Hissouf Mohamed, El Ihssini Hossine
{"title":"Free convection of hybrid water/aluminum oxide-copper nanofluid in cubic cavity","authors":"Dayf Abdellatif, Feddaoui M’barek, Bouchta Said, Hissouf Mohamed, El Ihssini Hossine","doi":"10.36963/ijtst.2023100203","DOIUrl":"https://doi.org/10.36963/ijtst.2023100203","url":null,"abstract":"Convective heat transfer is a physical phenomenon that continues to attract the interest of researchers in many fields of science and engineering. This work aims at numerically investigating the enhancement of heat transfer in a differentially heated three-dimensional cavity using a hybrid Al2O3-Cu-water nanofluid and Al2O3-water nanofluid. The partial differential equations are discretized in 3D by adopting the finite volume method and using the SIMPLEC algorithm for pressure correction. Heat transfer and fluid flow results are presented in the form of isotherms, velocity fields and mean Nusselt number. The results show that the effect of nanofluid and hybrid nanofluid on natural convection is more significant when the Rayleigh number is high. The use of hybrid nanofluid improves the heat transfer compared to nanofluid.","PeriodicalId":36637,"journal":{"name":"International Journal of Thermofluid Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44759752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Influence of variable viscosity and gravity fluctuation on double diffusive convection in a fluid layer with boundary slab of finite conductivity 变粘度和重力波动对有限导电性边界板流体层双扩散对流的影响
International Journal of Thermofluid Science and Technology Pub Date : 2023-07-01 DOI: 10.36963/ijtst.2023100302
G. Y. H., N. H.
{"title":"Influence of variable viscosity and gravity fluctuation on double diffusive convection in a fluid layer with boundary slab of finite conductivity","authors":"G. Y. H., N. H.","doi":"10.36963/ijtst.2023100302","DOIUrl":"https://doi.org/10.36963/ijtst.2023100302","url":null,"abstract":"The linear stability analysis is carried out for the onset of double-diffusive convection in a fluid layer with a boundary slab along with temperature-dependent viscosity and gravity fluctuation. The authors proposed three types of gravity fluctuation. We considered three cases of gravity field fluctuation: (a) linear and (b)parabolic and (c) cubic. An analytical solution for the subsequent problem is acquired through the perturbation technique. The findings demonstrate that the viscosity variation parameter, the thermal conductivity ratio, the gravity parameter, the depth ratio, and the soret parameter accelerate the start of convection, while the increasing Lewis number slow down the convective motion. Additionally, the system was found to be more stable for the linear type of gravity field fluctuation and more unstable for the cubic type of gravity field fluctuation.","PeriodicalId":36637,"journal":{"name":"International Journal of Thermofluid Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44268360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Conjugate heat transfer in an annulus with heated longitudinal and transversal fins 具有加热的纵向和横向翅片的环空中的共轭传热
International Journal of Thermofluid Science and Technology Pub Date : 2023-07-01 DOI: 10.36963/ijtst.2023100204
Hassen Haithem, S. Touahri, T. Boufendi
{"title":"Conjugate heat transfer in an annulus with heated longitudinal and transversal fins","authors":"Hassen Haithem, S. Touahri, T. Boufendi","doi":"10.36963/ijtst.2023100204","DOIUrl":"https://doi.org/10.36963/ijtst.2023100204","url":null,"abstract":"In this work, we numerically study the three-dimensional conjugate mixed convection heat transfer in a horizontal annulus equipped by longitudinal and transversal fins attached on its internal surface of outer cylinder. The external pipe and fins are heated by an electrical current passing through their small thickness while the inner pipe is kept adiabatic. We investigate the effects of adding longitudinal and transversal fins on the fluid dynamic and the heat transfer performances. The number of longitudinal fins varies from two to eight fins while the number of transvers ones is equal to four. The convection in the fluid domain is conjugated to thermal conduction in the pipes and fins solid thickness. The physical properties of the fluid are thermal dependent and the heat losses from the external pipe surface to the surrounding environment are taken account. The model equations of continuity, momenta and energy are numerically solved by the finite volume method with a second order spatiotemporal discretization. The Prandtl, the Reynolds and the Grashof numbers are fixed at 8.082, 399.02 and 12801 respectively. The obtained results showed that the axial Nusselt number increases with the increasing of number of fins. Moreover, the longitudinal fins configuration showed a more significant improvement in heat transfer than that of the transverse fins.","PeriodicalId":36637,"journal":{"name":"International Journal of Thermofluid Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45509177","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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