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首页> 外文期刊>International Journal of Heat and Mass Transfer >A combined path-percolation - Lattice-Boltzmann model applied to multiphase mass transfer in porous media
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A combined path-percolation - Lattice-Boltzmann model applied to multiphase mass transfer in porous media

机译：组合路径-渗流-Lattice-Boltzmann模型在多孔介质中多相传质中的应用

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摘要

In this work, single-component single-phase, and single-component multi-phase Lattice-Boltzmann models were developed to investigate the effects of liquid formation on mass transfer in porous channels via path-percolation theory. A two-dimensional lattice with nine velocity components was used in both Lattice-Boltzmann models. A confidence level of 99% was utilized to obtain statistical results of porosity, effective porosity, and tortuosity of the system with 0%, 10%, and 20% liquid formation. Velocity distributions in randomly generated inhomogeneous porous channels with different solid-liquid-vapor combinations were analyzed. The statistical results show that the porosity range of the initially generated porous media lies between the specified error limit of 0.001 determined by the confidence level study for all three cases with 70%, 80%, and 90% target porosity. When target porosity decreases, the difference between porosity and effective porosity increases, and the effective porosity range gets wider than the range of porosity. Effective diffusion coefficient decreases with increase in liquid formation, since the effective porosity decreases. An application programming interface called OpenMP was implemented on the developed serial in-house program and the effects of 1-4 threads on program performance and efficiency were investigated. The maximum speedup and performance gained are 3.3553 and 1.275 GFlops for 4 threads of a personal computer with a 38.4 GFlops peak performance.
机译：在这项工作中，开发了单组分单相和单组分多相Lattice-Boltzmann模型，以通过路径渗流理论研究液体形成对多孔通道中传质的影响。在两个Lattice-Boltzmann模型中均使用具有9个速度分量的二维晶格。利用99％的置信度获得了液体形成率为0％，10％和20％时系统的孔隙率，有效孔隙率和曲折度的统计结果。分析了具有不同固-液-汽组合的随机产生的非均质多孔通道中的速度分布。统计结果表明，对于目标孔隙率分别为70％，80％和90％的所有三种情况，初始生成的多孔介质的孔隙率范围都在置信度研究确定的0.001的误差极限范围内。当目标孔隙率减小时，孔隙率与有效孔隙率之间的差增大，并且有效孔隙率范围变得比孔隙率范围更宽。由于有效孔隙率降低，所以有效扩散系数随着液体形成的增加而降低。在开发的串行内部程序上实现了一个称为OpenMP的应用程序编程接口，并研究了1-4个线程对程序性能和效率的影响。个人计算机的4个线程的最大加速和性能为3.3553和1.275 GFlop，峰值性能为38.4 GFlop。

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  • 作者

    Ozgur Cekmer; Sukkee Um; Matthew M. Mench;

  • 作者单位

    Electrochemical Energy Storage and Conversion Laboratory, Department of Mechanical, Aerospace, and Biomedical Engineering, The University of Tennessee, Knoxville, TN 37996, USA;

    School of Mechanical Engineering Hanyang University, Seoul 133-791, South Korea;

    Electrochemical Energy Storage and Conversion Laboratory, Department of Mechanical, Aerospace, and Biomedical Engineering, The University of Tennessee, Knoxville, TN 37996, USA,Energy and Transportation Science Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Lattice-Boltzmann model; Path-percolation theory; Porous media; Multiphase flow; OpenMP; Statistical;

    机译：Lattice-Boltzmann模型;路径渗流理论;多孔介质多相流;OpenMP;统计;

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