文章基本信息

标题：Fluid Flow through PAKKA-Model Structures in Multiphase Flow
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作者：Pramod Kumar Pant ; Dr. Mohammad Miyan
期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2016
卷号：5
期号：7
页码：13410
DOI：10.15680/IJIRSET.2016.0507115
出版社：S&S Publications
摘要：In Fluid dynamics, the lattice-Boltzmann method is used to solve 3D Newtonian fluid flow problems inporous media given by tomographic imaging and by numerical modelling. In the Lattice Boltzmann method particlesare allowed to move and collide on a lattice. The rules governing the collisions are designed such that the time-averagemotion of the particles is consistent with the Navier-Stokes equations. The Lattice Boltzman method has multipleadvantages as its time and space efficient computations are straightforward to parallelize, it handles complexboundaries without difficulty and it directly links microscopic and macroscopic phenomena.By the lattice-Boltzmann simulations there are examination of the quality of numerical models of porous media andtomographic imaging techniques. The different models were taken to give a qualitatively dependence of permeabilityon porosity, but also effects of other structural properties were demonstrated. These include specific surface area,tortuosity, and shape and orientation of particles in the medium. The transverse and in-plane flow simulations forPAKKA-model samples augmented the characteristics of the samples and revealed e.g. the effect of fibre flexibility.The simulations show that results on paper can be sensitive to imaging techniques, since the permeability differencesbetween low and high-resolution images can be seen though the results within each technique were consistent. Thetable and graphs show the variation and dependency of porosity on the Darcy permeability and tortuosity.
关键词：PAKKA-model structure; Lattice-Boltzman method; Multiphase flow.