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Effect of Lorentz forces on forced-convection nanofluid flow over a stretched surface

Particuology 2016年第3期14卷 108-113页

作者： mohsen sheikholeslami M.T. Mustafa Davood Domiri Ganji Department of Mechanical Engineering Babol University of Technology Babol Islamic Republic oflran Department of Mathematics Statistics and Physics Qatar University Doha 2713 Qatar

Magnetic nanofiuid hydrothermal analysis over a plate is studied that includes consideration of thermal radiation. The Runge-Kutta （RK4） method is utilized to get solution of ODEs which are obtained from similarity solution. In considering the impacts of Brownian motion, we applied Koo-Kleinstreuer-Li cor- relation to simulate the properties of CuO-water. The influence is discussed of important parameters such as the temperature index, magnetic, radiation, and velocity ratio parameters and volume fraction of nanoparticle on hydrothermal behavior. Results illustrate that the coefficient of skin friction enhances with enhancing magnetic parameter while reduces with enhancing velocity ratio parameter. Also the Nusselt number was found to directly depend on the velocity ratio and temperature index parameters but has an inverse dependence on the magnetic and radiation parameters.

关键词： Nanofluid Brownian motion Thermal radiation Magnetohydrodynamic Stretching sheet

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Cubic Auto-Catalysis Reactions in Three-Dimensional Nanofluid Flow Considering Viscous and Joule Dissipations Under Thermal Jump

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Communications in Theoretical Physics 2019年第7期71卷 779-792页

作者： Rakesh Kumar Ravinder Kumar Reena Koundal Sabir Ali Shehzad mohsen sheikholeslami Department of Mathematics Central University of Himachal PradeshDharamshalaIndia Department of Mathematics COMSATS University IslamabadSahiwal 57000Pakistan Department of Mechanical Engineering Babol Noshirvani University of TechnologyBabolIran

In this problem,simultaneous effects of Joule and viscous dissipation in three-dimensional flow of nanoliquid have been addressed in slip flow regime under time dependent rotational oscillations.Silver nanoparticles are submerged in the base fluid(water)due to their chemical and biological features.To increment the novelty,effects of cubic autocatalysis chemical reactions and radiative heat transfer have been incorporated in the related boundary layer equations.Dimensionless partial differential system is solved by employing the proposed implicit finite difference approach.Convergence conditions and stability criteria are obtained to ensure the convergence and accuracy of solutions.A comparative analysis is proposed for no-slip nanofluid flow(NSNF)and slip nanofluid flow(SNF).Variations in skin-friction coefficients,Sherwood and Nusselt numbers against physical parameters are tabulated.It is investigated that velocity slip and temperature jump significantly control drag forces and rate of heat transfer.

关键词： cubic autocatalysis reactions viscous dissipation Joule heating rotating-fluctuating environment slip flow regime

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