Optimization of solver for gas flow modeling

25th IUPAP Conference on Computational Physics

物理学;计算机科学

Savichkin, D.^1 ; Dodulad, O.^1 ; Kloss, Yu.^1

National Research Centre Kurchatov Institute, 1 Akademika Kurchatova pl, Moscow 123182, Russia^1

关键词: Computational codes;    Computational time;    Gas flow model;    Optimization method;    Optimized solvers;    Rarefied gas flow;    SIMD extensions;    Sse instructions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/510/1/012049/pdf
DOI  :  10.1088/1742-6596/510/1/012049

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

The main purpose of the work is optimization of the solver for rarefied gas flow modeling based on the Boltzmann equation. Optimization method is based on SIMD extensions for ×86 processors. Computational code is profiled and manually optimized with SSE instructions. Heat flow, shock waves and Knudsen pump are modeled with optimized solver. Dependencies of computational time from mesh sizes and CPU capabilities are provided.