Shear flow over a porous layer: Velocity in the real proximity of the interface via rheological tests
Shear flow over a porous layer: Velocity in the real proximity of the interface via rheological tests
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多孔层上的剪切流：通过流变测试确定界面真实附近的速度
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
M. Minale
中科院分区：
文献类型：
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作者：
C. Carotenuto;M. Minale
本文对多孔介质上方受简单剪切作用的流体的速度分布进行了实验研究。为此，我们第一次使用了流变测试，该流变测试是用配备有平行板几何形状的恒定应力流变仪进行的，该平行板几何形状具有粘在下板上的真实的多孔介质。通过将自由流体中的线速度分布外推到界面来推断多孔层与自由流体之间的界面处的速度。这些数据与结合多孔介质中Darcy定律的Brinkman扩展和Ochoa-Tapia和Whitaker [Int. J. Heat Mass Transfer 38（14），2635（1995）]建议的在界面处通过速度连续性和动量平衡耦合的自由流体中的Stokes方程所获得的预测进行了很好的比较。在文献中，Ochoa-Tapia和Whitaker在界面处施加的应力跃变的物理起源被归因于维西附近速度剖面的扰动。
In this paper, we have experimentally investigated the velocity profile of a fluid undergoing simple shear above a porous medium. To this end, we used for the first time rheological tests performed with a constant stress rheometer equipped with parallel plate geometry with a real porous medium glued on the lower plate. The velocity at the interface between the porous layer and the free fluid was inferred by extrapolating the linear velocity profile in the free fluid to the interface. These data were nicely compared with predictions obtained integrating the Brinkman extension of Darcy law in the porous medium together with Stokes equations in the free fluid coupled at the interface by the continuity of velocity and by the momentum balance suggested by Ochoa-Tapia and Whitaker [Int. J. Heat Mass Transfer 38(14), 2635 (1995)]. In the literature, the physical origin of the stress jump imposed by Ochoa-Tapia and Whitaker at the interface has been attributed to a perturbation of the velocity profile in the vici...