Utilization of pressure wave-dynamics in accelerating convergence of the lattice-Boltzmann method for steady and unsteady flows

作者：

Highlights：

• A steady-state acceleration scheme for the lattice-Boltzmann method (LBM) is proposed.

• Information carried by transient pressure waves is used to obtain rapid solutions.

• The algorithm is successfully validated and exhibits time-savings of up to 63.8%.

• The method is universally robust, admitting the SRT, MRT, and entropic formulations.

• This scheme also effectively reduces the transient stage of unsteady, complex flows.

摘要

•A steady-state acceleration scheme for the lattice-Boltzmann method (LBM) is proposed.•Information carried by transient pressure waves is used to obtain rapid solutions.•The algorithm is successfully validated and exhibits time-savings of up to 63.8%.•The method is universally robust, admitting the SRT, MRT, and entropic formulations.•This scheme also effectively reduces the transient stage of unsteady, complex flows.

论文关键词：Pressure waves,Lattice-Boltzmann methods,Convergence acceleration,Multirelaxation time collision operator,Entropic collision operator

论文评审过程：Received 7 April 2021, Revised 26 June 2021, Accepted 2 July 2021, Available online 19 July 2021, Version of Record 19 July 2021.

论文官网地址：https://doi.org/10.1016/j.amc.2021.126498