Lattice Boltzmann method for variable viscous fluid flow on spherical surface

Junxiang Yang, Seungyoon Kang, Youngjin Hwang, Soobin Kwak, Seokjun Ham, Junseok Kim

Research output: Contribution to journalArticlepeer-review

Abstract

We propose an efficient numerical method for an incompressible fluid flow with variable viscosity on spherical surface. The proposed computational scheme is based on a finite volume lattice Boltzmann method (FVLBM). The spherical surface is triangulated and each point on the triangular mesh is assigned to one of two values of variable viscosity. Simplified coastlines using interpolation makes our proposed method highly efficient for solving fluid flows. Using the proposed algorithm, we simulate various fluid flows over inhomogeneous domains, i.e., land and sea areas. We apply different viscosity values for each domain using different relaxation times based on position of node points. Moreover, the progression of the storm is examined to demonstrate the effectiveness of the proposed approach.

Original languageEnglish
Article number105781
JournalEngineering Analysis with Boundary Elements
Volume165
DOIs
Publication statusPublished - 2024 Aug

Bibliographical note

Publisher Copyright:
© 2024 Elsevier Ltd

Keywords

  • Spherical surface
  • Surface lattice Boltzmann method
  • Variable viscosity

ASJC Scopus subject areas

  • Analysis
  • General Engineering
  • Computational Mathematics
  • Applied Mathematics

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