Browsing by Author "Abdel-wahed, M. S."

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    Flow and heat transfer over a moving surface with non-linear velocity and variable thickness in a nanofluids in the presence of Brownian motion
    (ELSEVIER SCIENCE INC, 2015) Abdel-wahed, M. S.; Elbashbeshy, E. M. A.; Emam, T. G.
    The effects of variable thickness, hydromagnetic flow, Brownian motion, heat generation, on heat transfer characteristics and mechanical properties of a moving surface embedded into cooling medium consists of water with nano-particles are studied. The governing boundary layer equations are transformed to ordinary differential equations. These equations are solved analytically using (OHAM) for general conditions. The velocity, temperature, and concentration profiles within the boundary layer are plotted and discussed in details for various values of the different parameters such as Brownian parameter, thermophoresis parameter, shape parameter, magnetic parameter and heat source parameter the effect of the cooling medium and flatness on the mechanical properties of the surface are investigated. (C) 2014 Elsevier Inc. All rights reserved.
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    Flow and heat transfer over a moving surface with nonlinear velocity and variable thickness in a nanofluid in the presence of thermal radiation
    (CANADIAN SCIENCE PUBLISHING, 2014) Elbashbeshy, E. M. A.; Emam, T. G.; Abdel-wahed, M. S.
    We investigate the flow and heat transfer in nanofluids over a continuous variable thickness surface subjected to nonlinear velocity and thermal radiation. Three types of nanofluids, namely Cu, Ag, and Al2O3 were studied. A similarity transformation was used to obtain a system of nonlinear ordinary differential equations, which was solved numerically for general conditions. Numerical results were obtained for the skin friction, Nusselt number as well as for the velocity and temperature for selected values of the governing parameters, such as nanoparticle volume friction, surface thickness parameter, velocity power index parameter, and radiation parameter. A comparison of obtained numerical results is made with previously published results in some special cases, and found to be in a good agreement.