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Experimental study on moving boundaries of fluid flow in porous media

机译：多孔介质中流体流动边界的实验研究

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Researches on the boundary shape of fluid flow in porous media play an important role in engineering practices, such as petroleum exploitation, nuclear waste disposal and groundwater contamination. In this paper, six types of artificial porous samples (emery jade) with different porosities are manufactured. With the background of slow flow in porous media, laboratory experiments are carried out by observing the movement of five types of fluids with different dynamic viscosities in various types of porous media. A digital video recorder is employed to record the complete process of the fluid flow in the porous media. Based on the digital photos of the moving boundaries of fluid flow in porous media, the average displacement and fractal dimension of the moving boundary are estimated for different combinations of porosity and dynamic viscosity. Moreover, the evolution behavior of the average velocity and fractal dimension of the moving boundary with time is known. The statistical relations of the average velocity, the fractal dimension of the moving boundary and the porosity of porous media and the dynamic viscosity of fluids are proposed in this paper. It is shown that the front shape of the moving boundary of fluid flow in porous media is an integrated result of the porosity of porous media and the dynamic viscosity of fluids.
机译：对多孔介质中流体流动边界形状的研究在石油开采，核废料处置和地下水污染等工程实践中起着重要作用。本文制备了六种不同孔隙度的人造多孔样品（金刚玉）。在多孔介质缓慢流动的背景下，通过观察五种类型的具有不同动态粘度的流体在各种类型的多孔介质中的运动来进行实验室实验。使用数字视频记录器记录多孔介质中流体流动的完整过程。根据多孔介质中流体流动边界的数码照片，可以估算出孔隙度和动态粘度的不同组合下的平均边界位移和分形维数。此外，已知移动边界的平均速度和分形维数随时间的演化行为。提出了平均速度，运动边界的分形维数和多孔介质孔隙率与流体动力黏度的统计关系。结果表明，多孔介质中流体流动边界的前部形状是多孔介质孔隙率和流体动力粘度的综合结果。

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