A coupled lattice Boltzmann-finite difference approach for boiling two-phase flow with high density ratios

Shimpei Saito, Yutaka Abe, Ken Ichi Ebihara, Alessandro De Rosis, Akiko Kaneko, Kazuya Koyama

Research output: Contribution to journalConference articlepeer-review

Abstract

We successfully simulated a series of pool boiling process, such as nucleation, growth, coalescence, and departure of vapor bubbles, with density ratio of 1000 using a coupled lattice Boltzmann-finite difference method. In our model, the continuity and Navier-Stokes equations are solved by the cascaded pseudopotential lattice Boltzmann model recently proposed by Lycett-Brown and Luo [Phys. Rev. E 94, 053313 (2016)] to deal with the high-density-ratio two-phase flows; the temperature equation with a source term to trigger phase-change is solved by the finite difference method to avoid the error term due to high-density ratio of multiphase flows which is pointed out by Li et al. [Int. J. Heat Mass Transfer 85, 787 (2015)]. The numerical results show that our model well reproduces the fundamental characteristics of the boiling curve for pool systems.

Original languageEnglish
Pages (from-to)1705-1712
Number of pages8
JournalInternational Heat Transfer Conference
Volume2018-August
DOIs
Publication statusPublished - 1 Aug 2018
Event16th International Heat Transfer Conference - Beijing, China
Duration: 10 Aug 201815 Aug 2018

Keywords

  • Boiling two-phase flow
  • Cascaded lattice Boltzmann method
  • Finite difference method
  • High density ratio
  • Pseudopotential model

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