化学反应对高对流Maxwell流体在多孔面上作MHD流动和传质的影响

MHD Flow and Mass Transfer of a Chemically Reactive Upper Convected Maxwell(UCM) Fluid Past a Porous Surface

研究导电的高对流Maxwell流体在多孔表面上,作计及物质化学反应时的MHD流动及其传质.将非线性的偏微分控制方程及其相应的边界条件,变换为非线性的常微分方程,并利用Kel-ler-Box法进行数值求解.用图形给出了各种物理参数对流动和传质特性的影响,并对结果进行了讨论.可以看到,化学反应阶次提高了扩散边界层的厚度;还可以看到,传质率强烈地依赖于Schmidt数和反应率参数.此外,在特例情况下得到了以往文献中可供利用的结果.

The MHD flow and mass transfer of an electrically conducting upper convected Max- well fluid at a porous surface in the presence of a chemically reactive species was studied. The governing nonlinear partial differential equations along with the appropriate boundary conditions were transformed into nonlinear ordinary differential equations, and were solved numerically by the Keller-Box method. The effects of various physical parameters on the flow and mass trans- fer characteristics were presented graphically and discussed. It is observed that the order of the chemical reaction is to increase the thickness of the diffusion boundary layer. Also, the mass transfer rate strongly depends on the Schmidt number and the reaction rate parameter. Further- more, available results in the literature are obtained as a special case.