Efficient and error minimized coupling procedures for unstructured and moving meshes

JOURNAL OF COMPUTATIONAL PHYSICS

卷:406

Article

Lundquist, Tomas¹  Malan, Arnaud G.¹  Nordstrom, Jan² 

[1] Univ Cape Town, Dept Mech Engn, Ind CFD Res Grp, Cape Town, South Africa

[2] Linkoping Univ, Dept Math Computat Math, Linkoping, Sweden

关键词: Numerical interfaces;    Moving meshes;    Sliding meshes;    Summation-by-parts;    Stability;    Conservation;   

DOI  :  10.1016/j.jcp.2019.109158

来源: Elsevier

【 摘 要 】

We present a methodology for automatic generation and optimization of interpolation operators for the coupling of general non-collocated and/or moving numerical interfaces. The discrete equations are solved in a method-of-lines fashion by assuming volume preserving mesh motions. Interface interpolation errors are minimized effectively in a global least-squares sense, while satisfying strict stability conditions. The proposed automatic interface procedure is both more versatile and more accurate compared to previous techniques. We apply the new method to interfaces between hybrid meshes undergoing relative rigid body motion, demonstrating the stability, conservation and superior accuracy. (C) 2019 Published by Elsevier Inc.

【 授权许可】

Free