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Joule Heating Effects on Unsteady Natural Convection Flow Near a Moving Semi-Infinite Vertical Plate with Variable Heat Flux and Mass Transfer

机译:焦耳加热对不稳定的自然对流流动,在移动半无限垂直板附近具有可变热通量和传质的垂直板

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The unsteady MHD free convective boundary-layer flow along an impulsively started semi-infinite vertical plate with variable heat flux and mass transfer have been investigated numerically. The effects of chemical reaction, thermal radiation and Joule heating are incorporated in the governing equations. Crank-Nicolson finite-difference method is used to solve the governing coupled non-linear partial differential equations. The influence of thermal radiation, chemical reaction and Joule heating on flow characteristics are presented graphically and discussed in detailed. To validate the present numerical results, a comparison study has been performed with the previously published results and found that the results are in excellent agreement. It is found that the local Nusselt and Sherwood numbers decreases with the intensification of magnetic field and the local Sherwood number slightly decreases with the increase of radiation parameter.
机译:在数值上研究了沿着冲动开始的半无限垂直板的不稳定的MHD自由对流边界层流量。化学反应,热辐射和焦耳加热的影响结合在控制方程中。曲柄 - 尼古尔森有限差分方法用于解决控制耦合的非线性偏微分方程。图形上呈现了热辐射,化学反应和焦耳加热对流动特性的影响,并详细讨论。为了验证目前的数值结果,已经通过先前公布的结果进行了比较研究,发现结果符合很好的协议。结果发现,当地Nusselt和Sherwood数量随着磁场的强化而降低,并且随着辐射参数的增加,本地舍伍德数略微降低。

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