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Title: Multiple-relaxation-time color-gradient lattice Boltzmann model for simulating two-phase flows with high density ratio

Journal Article · · Physical Review E
 [1];  [2];  [3];  [4];  [5]
  1. Xi'an Jiaotong Univ. (China); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Xi'an Jiaotong Univ. (China)
  3. Central South Univ., Changsha (China)
  4. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  5. Xi'an Jiaotong Univ. (China); Collaborative Innovation Center for Advance Aero-Engine (CICAAE), Beijing (China)

In this paper, we propose a color-gradient lattice Boltzmann (LB) model for simulating two-phase flows with high density ratio and high Reynolds number. The model applies a multi-relaxation-time (MRT) collision operator to enhance the stability of the simulation. A source term, which is derived by the Chapman-Enskog analysis, is added into the MRT LB equation so that the Navier-Stokes equations can be exactly recovered. Also, a new form of the equilibrium density distribution function is used to simplify the source term. To validate the proposed model, steady flows of a static droplet and the layered channel flow are first simulated with density ratios up to 1000. Small values of spurious velocities and interfacial tension errors are found in the static droplet test, and improved profiles of velocity are obtained by the present model in simulating channel flows. Then, two cases of unsteady flows, Rayleigh-Taylor instability and droplet splashing on a thin film, are simulated. In the former case, the density ratio of 3 and Reynolds numbers of 256 and 2048 are considered. The interface shapes and spike/bubble positions are in good agreement with the results of previous studies. In the latter case, the droplet spreading radius is found to obey the power law proposed in previous studies for the density ratio of 100 and Reynolds number up to 500.

Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1417163
Alternate ID(s):
OSTI ID: 1294711
Report Number(s):
LA-UR-17-27935; PLEEE8; TRN: US1800995
Journal Information:
Physical Review E, Vol. 94, Issue 2; ISSN 2470-0045
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 81 works
Citation information provided by
Web of Science

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  • Tölke, Jonas
  • Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences, Vol. 360, Issue 1792 https://doi.org/10.1098/rsta.2001.0944
journal March 2002
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Cited By (9)

Comparison of multiphase SPH and LBM approaches for the simulation of intermittent flows journal June 2019
Entropic multiple-relaxation-time multirange pseudopotential lattice Boltzmann model for two-phase flow journal March 2018
Interface tracking characteristics of color-gradient lattice Boltzmann model for immiscible fluids journal January 2020
Improved locality of the phase-field lattice-Boltzmann model for immiscible fluids at high density ratios journal November 2017
Phase-field-based lattice Boltzmann modeling of large-density-ratio two-phase flows journal March 2018
Phase-field method based on discrete unified gas-kinetic scheme for large-density-ratio two-phase flows journal April 2019
Three-dimensional lattice Boltzmann method benchmarks between color-gradient and pseudo-potential immiscible multi-component models journal July 2017
Numerical investigations of gas–liquid two-phase flows in microchannels journal November 2017
Different Stages of Liquid film Growth in a Microchannel: Two-Phase Lattice Boltzmann Study journal September 2018