Transition in the Flow of Power-Law Fluids through Isotropic Porous Media
Transition in the Flow of Power-Law Fluids through Isotropic Porous Media
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DOI：
10.1103/physrevlett.117.074502
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发表时间：
2016-08-10
影响因子：
8.6
通讯作者：
Davit, Y.
中科院分区：
文献类型：
--
作者：
Zami-Pierre, F.;de Loubens, R.;Davit, Y.
我们使用计算流体动力学来探索幂律流体通过各向同性多孔介质的蠕动流动。我们发现流动模式主要由多孔结构的几何形状控制，而不是由流体流变学的非线性效应控制。我们进一步强调了牛顿和非牛顿体系之间的宏观转变，这是流体粘度和多孔介质结构之间耦合的标志。流动的这些复杂特征可以浓缩为有效长度尺度，它定义了非牛顿转变和牛顿渗透率。
We use computational fluid dynamics to explore the creeping flow of power-law fluids through isotropic porous media. We find that the flow pattern is primarily controlled by the geometry of the porous structure rather than by the nonlinear effects in the rheology of the fluid. We further highlight a macroscale transition between a Newtonian and a non-Newtonian regime, which is the signature of a coupling between the viscosity of the fluid and the structure of the porous medium. These complex features of the flow can be condensed into an effective length scale, which defines both the non-Newtonian transition and the Newtonian permeability.