Development of an Unsteady Aerodynamic Simulator Using Large-Eddy Simulation Based on High-Performance Computing Technique

Document Number: 2009-01-0007

Date Published: April 2009

Author(s):
Makoto Tsubokura - Hokkaido Univ.
Takuji Nakashima - Hiroshima Univ
Kozo Kitoh - Kozo Kitoh Technology
Yoshihiro Sasaki - AdvanceSoft Co. Ltd.
Nobuyuki Oshima - Hokkaido Univ
Toshio Kobayashi - Japan Automobile Research Institute

Abstract:
A numerical method specially designed to predict unsteady aerodynamics of road vehicle was developed based on unstructured Large-Eddy Simulation (LES) technique. The code was intensively optimized for the Earth Simulator in Japan to deal with the excessive computational resources required for LES, and could treat numerical meshes of up to around 120 million elements. Moving boundary methods such as the Arbitrary Lagrangian-Eulerian (ALE) or the sliding method were implemented to handle dynamic motion of a vehicle body during aerodynamic assessment. The method can also model a gusty crosswind condition. The method was applied to three cases in which unsteady aerodynamics are expected to be crucial.

File Size: 7208K
Product Status: In Stock

Included in: V118-6

See other papers presented at SAE World Congress & Exhibition, April 2009, Detroit, MI, USA, Session: Vehicle Aerodynamics (Part 2 of 5): Turbulence and Unsteady Aero

Purchase more technical papers and save! With TechSelect, you decide what SAE Technical Papers you need, when you need them, and how much you want to pay. Learn more >