Prediction of Moments in the Particles on Demand Method for LBM

被引：0

作者：

Zipunova, Elizaveta ^{[1
]}

Perepelkina, Anastasia ^{[1
]}

Levchenko, Vadim ^{[1
]}

Zvezdin, German ^{[1
,2
]}

机构：

[1] Keldysh Inst Appl Math RAS, 4 Miusskaya sq, Moscow 125047, Russia

[2] Moscow MV Lomonosov State Univ, 1 Ulitsa Kolmogorova, Moscow 119991, Russia

来源：

COMMUNICATIONS IN COMPUTATIONAL PHYSICS | 2023年 / 33卷 / 01期

基金：

俄罗斯科学基金会;

关键词：

LBM; compressible; off-grid; LATTICE-BOLTZMANN SIMULATIONS; MODELS; FLOWS;

D O I：

10.4208/cicp.OA-2022-0048

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

PonD is a method to extend LBM calculations to arbitrary ranges of Mach number and temperature. The current work was motivated by the issue of mass, mo-mentum and energy conservation in the PonD method for LBM. The collision guar-antees their conservation, thus, the study involves all aspects of the streaming step: both coordinate and velocity space discretizations, gauge transfer method, resolution of the scheme implicitness. After obtaining the expressions for the change of moments in the system in a time update of the scheme, it was found that the scheme can be for-mulated as explicit in some cases. Thus, we found the sufficient conditions to make Pond/RegPonD computations explicit and mass, momentum, and energy conserving. The scheme was implemented in the explicit form, and validated for several test cases.

引用

页码：144 / 173

页数：30

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