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Flow and natural convection heat transfer characteristics of non-Newtonian nanofluid flow bounded by two infinite vertical flat plates in presence of magnetic field and thermal radiation using Galerkin method

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Journal of Central South University 2019年第5期26卷 1294-1305页

作者： peyman maghsoudi Gholamreza SHAHRIARI Hamed RASAM Sadegh SADEGHI School of Engineering University of TehranTehran ***Iran School of Engineering Iran University of Science and TechnologyTehran ***Iran

The main goal of this paper is to investigate natural convective heat transfer and flow characteristics of non-Newtonian nanofluid streaming between two infinite vertical flat plates in the presence of magnetic field and thermal ***,a similarity transformation is used to convert momentum and energy conservation equations in partial differential forms into non-linear ordinary differential equations (ODE) applying meaningful boundary *** order to obtain the non-linear ODEs analytically,Galerkin method (GM) is ***,the ODEs are also solved by a reliable numerical *** order to test the accuracy,precision and reliability of the analytical method,results of the analytical analysis are compared with the numerical *** respect to the comparisons,fairly good compatibilities with insignificant errors are ***,the impacts of effective parameters including magnetic and radiation parameters and nanofluid volume fraction on the velocity,skin friction coefficient and Nusselt number distributions are comprehensively *** on the results,it is revealed that with increasing the role of magnetic force,velocity profile,skin friction coefficient and thermal performance *** parameter has insignificant influence on velocity profile while it obviously has augmentative and decreasing effects on skin friction and Nusselt number,respectively.

关键词： non-Newtonian flow nanofluid flow Galerkin method magnetic field radiation

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Analytical investigation of temperature of a single micron sized iron particle during combustion

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Journal of Central South University 2020年第3期27卷 951-962页

作者： peyman maghsoudi Mehdi BIDABADI Seyed Amir Hossein MADANI Abolfazl AFZALABADI Department of Energy Conversion School of Mechanical EngineeringIran University of Science and Technology(IUST)Narmak16846-13114TehranIran

The present study deals with analytical investigation of temperature of a single burning iron *** mathematical methods including AGM(Akbari-Ganji’s method),CM(Collocation method)and GM(Galerkin Method)are applied to solving non-linear differential governing equation and effectiveness of these methods is examined as *** further investigation,forth order Runge-Kutta approach,a numerical method,is used to validate the obtained analytical *** the present study,the developed mathematical model takes into account the effects of thermal radiation,convective heat transfer and particle density variations during combustion *** to particles’small size and high thermal conductivity,the system is assumed to be lumped in which the particle temperature does not change within the body and all of its regions are at the same *** temperature distributions obtained by analytical methods have satisfactory agreement with numerical ***,the results indicate that AGM is a more appropriate method than GM and CM due to its lower mean relative error and less run time.

关键词： iron particle combustion analytical solutions thermal radiation convective heat transfer

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