Robust moving mesh algorithms for hybrid stretched meshes: Application to moving boundaries problems

JOURNAL OF COMPUTATIONAL PHYSICS

卷:326

Article

Landry, Jonathan¹  Soulaimani, Azzeddine¹  Luke, Edward²  Ali, Amine Ben Haj³ 

[1] Ecole Technol Super, Dept Mech Engn, 1100 Rue Notre Dame Ouest, Montreal, PQ H3C 1K3, Canada

[2] Mississippi State Univ, Dept Comp Sci & Engn, Box 9637, Mississippi State, MS 39762 USA

[3] Bombardier Aerosp, Dept Adv Aerodynam, 2351 Boul Alfred Nobel BAN1, St Laurent, PQ H4S 2A9, Canada

关键词: Moving mesh;    IDW;    GETMe;    Smoothing;    Untangler;    MSA;   

DOI  :  10.1016/j.jcp.2016.09.008

来源: Elsevier

【 摘 要 】

A robust Mesh-Mover Algorithm (MMA) approach is designed to adapt meshes of moving boundaries problems. A new methodology is developed from the best combination of well-known algorithms in order to preserve the quality of initial meshes. In most situations, MMAs distribute mesh deformation while preserving a good mesh quality. However, invalid meshes are generated when the motion is complex and/or involves multiple bodies. After studying a few MMA limitations, we propose the following approach: use the Inverse Distance Weighting (IDW) function to produce the displacement field, then apply the Geometric Element Transformation Method (GETMe) smoothing algorithms to improve the resulting mesh quality, and use an untangler to revert negative elements. The proposed approach has been proven efficient to adapt meshes for various realistic aerodynamic motions: a symmetric wing that has suffered large tip bending and twisting and the high-lift components of a swept wing that has moved to different flight stages. Finally, the fluid flow problem has been solved on meshes that have moved and they have produced results close to experimental ones. However, for situations where moving boundaries are too close to each other, more improvements need to be made or other approaches should be taken, such as an overset grid method. (C) 2016 Elsevier Inc. All rights reserved.

【 授权许可】

Free