A thermal immiscible multiphase flow simulation by lattice Boltzmann method

Wei Gong, Sheng Chen, Yuying Yan*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

The lattice Boltzmann (LB) method, as a mesoscopic approach based on the kinetic theory, has been significantly developed and applied in a variety of fields in the recent decades. Among all the LB community members, the pseudopotential LB plays an increasingly important role in multiphase flow and phase change problems simulation. The thermal immiscible multiphase flow simulation using pseudopotential LB method is studied in this work. The results show that it is difficult to achieve multi-bubble/droplet coexistence due to the unphysical mass transfer phenomenon of “the big eat the small” – the small bubbles/droplets disappear and the big ones getting bigger before a physical coalescence when using an internal energy based temperature equation for single-component multiphase (SCMP) pseudopotential models. In addition, this unphysical effect can be effectively impeded by coupling an entropy-based temperature field, and the influence on density fields with different energy equations are discussed. The findings are identified and reported in this paper for the first time. This work gives a significant inspiration for solving the unphysical mass transfer problem, which determines whether the SCMP LB model can be used for multi-bubble/droplet systems.
Original languageEnglish
Pages (from-to)136-138
Number of pages3
JournalInternational Communications in Heat and Mass Transfer
Volume88
Early online date19 Sept 2017
DOIs
Publication statusPublished - Nov 2017
Externally publishedYes

Keywords

  • Multi-bubble/droplet coexistence
  • Pseudopotential lattice Boltzmann method
  • Thermal immiscible multiphase flow
  • Unphysical mass transfer

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • General Chemical Engineering
  • Condensed Matter Physics

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