Lattice-Boltzmann simulation of the effect of particle-fluid density ratio on instability of two-phase flow

doi:10.7523/j.issn.2095-6134.2017.02.012

›› 2017, Vol. 34 ›› Issue (2): 198-203.DOI: 10.7523/j.issn.2095-6134.2017.02.012

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Lattice-Boltzmann simulation of the effect of particle-fluid density ratio on instability of two-phase flow

LIU Guodong¹, YIN Xiaolong², WANG Shuai¹, LU Huilin¹, ZHANG Yanan¹

1 School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;
2 Petroleum Engineering Department of Colorado School of Mines, Golden 80401, USA

Received:2016-05-25 Revised:2016-09-06 Online:2017-03-15

Abstract

Abstract: A lattice-Boltzmann method is used to simulate the hydrodynamic property of particles in a periodic domain. An Archimedes number of 1 432 is used for the system corresponding to the terminal Reynolds number of 30. Simulations are carried out when the average solid volume fraction is 25[WTB4]%[WTBZ], and the density ratio ranges from 2 to 1 000 (from liquid-particle density ratio to gas-particle density ratio). Investigation of the effect of density ratio on stability of the fluid-particle flow system is carried out. The collision among particles is consideved to be elastic. The variations regulations of mean particle velocity, variance, skewness and kurtosis are obtained and analyzed. By combining with the structure factor analysis, the relationships between particle velocity properties and dynamic clusters are determined at different density ratios when the stable-unstable transition occurs, and the density ratio range is also determined.

Key words: lattice-Boltzmann method, particle-fluid density ratio, flow instability

CLC Number:

TK224

LIU Guodong, YIN Xiaolong, WANG Shuai, LU Huilin, ZHANG Yanan. Lattice-Boltzmann simulation of the effect of particle-fluid density ratio on instability of two-phase flow[J]. , 2017, 34(2): 198-203.

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Lattice-Boltzmann simulation of the effect of particle-fluid density ratio on instability of two-phase flow

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