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arXiv 1509.04873physics.flu-dyn
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无序多孔介质中幂指数速度分布

Power exponential velocity distributions in disordered porous media

Maciej Matyka, Jarosław Gołembiewski, Zbigniew Koza

摘要:

速度分布函数将流体在多孔介质中流动的微观和宏观理论联系起来。在这里,我们在随机多孔介质模型中研究流体绝对速度及其相对于宏观流动方向的纵向和横向分量。我们声称,所有的分布遵循幂指数律控制的指数$γ$和移位参数$u_0$,并检查这些参数如何依赖于孔隙度。我们发现,$γ$在渗流阈值处具有普适值$1/2$,并随孔隙度的增大而增大,但不会超过2。

英文摘要:

Velocity distribution functions link the micro- and macro-level theories of fluid flow through porous media. Here we study them for the fluid absolute velocity and its longitudinal and lateral components relative to the macroscopic flow direction in a model of a random porous medium. We claim that all distributions follow the power exponential law controlled by an exponent $γ$ and a shift parameter $u_0$ and examine how these parameters depend on the porosity. We find that $γ$ has a universal value $1/2$ at the percolation threshold and grows with the porosity, but never exceeds 2.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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