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arXiv 0910.0619physics.flu-dynphysics.comp-ph
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屈服-应力流体在多孔介质中的流动模拟

Modeling the Flow of Yield-Stress Fluids in Porous Media

Taha Sochi

摘要:

屈服应力是一种有争议的非牛顿流动现象。在这篇文章中,我们研究的屈服应力物质通过多孔介质的孔隙尺度网络模型的框架内的流动。我们还研究了最小阈值路径(MTP)算法的有效性,以预测网络描绘随机或规则多孔介质的压力屈服点。作为预测网络屈服点的基础的逾渗理论简要介绍和评估。在这项研究的过程中,一个屈服应力流模拟模型以及几个数值算法相关的屈服应力在多孔介质中的开发,实施和评估。一般的结论是,模拟多孔介质中屈服应力流体的流动是太困难和有问题。未来需要更基本的建模策略来解决这个问题。

英文摘要:

Yield-stress is a problematic and controversial non-Newtonian flow phenomenon. In this article, we investigate the flow of yield-stress substances through porous media within the framework of pore-scale network modeling. We also investigate the validity of the Minimum Threshold Path (MTP) algorithms to predict the pressure yield point of a network depicting random or regular porous media. Percolation theory as a basis for predicting the yield point of a network is briefly presented and assessed. In the course of this study, a yield-stress flow simulation model alongside several numerical algorithms related to yield-stress in porous media were developed, implemented and assessed. The general conclusion is that modeling the flow of yield-stress fluids in porous media is too difficult and problematic. More fundamental modeling strategies are required to tackle this problem in the future.

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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