Natural convection of non-Newtonian power-law fluid over axisymmetric and two-di

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Natural convection of non-Newtonian power-law fluid over axisymmetric and two-dimensional bodies of arbitrary shape in fluid-saturated porous media水利论文C{.w'y5T7b2s

9n8SS)@y&H0Abstract:Numerical analysis of the free convection coupled heat and mass transfer is presented for non-Newtonian power-law fluids with the yield stress flowing over a two-dimensional or axisymmetric body of an arbitrary shape in a fluid-saturated porous medium. The governing boundary layer equations and boundary conditions are cast into a dimensionless form by the similarity transformation. The resulting system of equations is solved by a finite difference method. The parameters studied are the rheological constants, the buoyancy ratio, and the Lewis number. Representative velocity, temperature,and concentration profiles are presented and discussed. It is found that the results depend strongly on the values of the yield stress parameter and the power-law index of the non-Newtonian fluid.

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Department of Science and Mathematics, Faculty of Education, Assiut University, The New Valley 72111, Egypt

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5|$y;U&v,R:^:h I|X0porous media arbitrary shape power-law coupled heat and mass transfer yield stress system of equations boundary conditions finite difference axisymmetric body free convection boundary layer velocity profiles analysis results Lewis index found form cast

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