Open AccessLarge Eddy Simulation with wall functions of Ahmed body
Author(s) -
Dmitry Kolmogorov,
Andreas Hüppe,
F. R. Menter,
А. В. Гарбарук
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2103/1/012213
Subject(s) - polygon mesh , flow (mathematics) , large eddy simulation , computer science , octree , turbulence , flow separation , mesh generation , topology (electrical circuits) , mechanics , algorithm , mathematics , computer graphics (images) , physics , engineering , structural engineering , finite element method , combinatorics
Large Eddy Simulation with Wall Function (WFLES) is known to be a cheap alternative to classical LES methods for simulation of flow where large and complex computational meshes are typically required. This makes it attractive for engineering applications. However experience of applying such methods to complex turbulent flows with flow separation and reattachment is still little-known in literature. In this work WFLES of flow around simplified car body with slant angle equal to 25 degrees and Re L = 2.8 · 10 6 is carried out on Octree mesh to demonstrate the capabilities and limitations of the method in such type of the flow. The results on a series of meshes show that even though the general flow topology is well captured, the critical part of the flow on the slant is hardly predicted even on 100 mln mesh. It is concluded that the prediction of separation above the slant requires significant mesh refinement even in the frame of WFLES.