A Novel Lattice Boltzmann Model for Fourth Order Nonlinear Partial Differential Equations

Zhonghua Qiao, Xuguang Yang, Yuze Zhang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

In this paper, a novel lattice Boltzmann (LB) equation model is proposed to solve the fourth order nonlinear partial differential equation (NPDE). Different from existing LB models, a source distribution function is introduced to remove some unwanted terms in the nonlinear part of the equation. Hereby, the equilibrium distribution function is designed to follow the rule of Chapman–Enskog (C–E) analysis. Through the C–E procedure, the fourth order NPDE can be recovered perfectly from the proposed LB model. A series of numerical experiments have been carried out to solve some widely studied fourth order NPDEs, including the Kuramoto–Sivashinsky equation, Cahn–Hilliard equation with double-well potential and a fourth order diffuse interface model with Peng–Robinson equation of state. Numerical results show that the performance of the present LB model is much better than other existing LB models.

Original languageEnglish
Article number51
Pages (from-to)1-18
Number of pages18
JournalJournal of Scientific Computing
Volume87
Issue number2
DOIs
Publication statusE-pub ahead of print - 2 Apr 2021

Keywords

  • Cahn–Hilliard equation
  • Fourth order nonlinear partial differential equation
  • Lattice Boltzmann method

ASJC Scopus subject areas

  • Software
  • Theoretical Computer Science
  • Numerical Analysis
  • Engineering(all)
  • Computational Theory and Mathematics
  • Computational Mathematics
  • Applied Mathematics

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