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在一个平行板通道中,部分充满了均匀的多孔介质,部分为纯流体的流动区,对其微通道中完全发展的不稳定层流进行了数值分析,流动由其中一块板的运动和压力梯度所引起.多孔介质区域的流动,采用扩展的Brinkman模型,即Darcy模型,纯净流动区域的流动,采用Stokes方程.还对稳定的完全发展流进行了理论分析,给出了分界面速度、边界板处的速度和表面摩擦的闭式解.通过数值计算发现,稳定完全发展流的闭式解,和不稳定流动的数值解,在所有时间点上得到很好地吻合.
In a parallel plate channel, partially filled with a uniform porous medium, part of the pure fluid flow region, its fully developed microchannel instability laminar flow numerical analysis, the flow from one of the plate motion and pressure gradient , The flow of porous media region is extended by Brinkman model, namely Darcy model, the flow in the pure flow region and the Stokes equation are used.The theoretical analysis of steady complete flow is also given, and the interface velocity, boundary plate Closed solution of velocity and surface friction at the same time.From the numerical calculation, it is found that the closed solution of steady complete evolution flow and the numerical solution of unsteady flow agree well at all time points.