Exterior Airflow Simulations Using a Lattice Boltzmann Approach

Document Number: 2002-01-0596

Date Published: March 2002

Author(s):
Robert Louis Lietz - Ford Motor Co.
Swapan Mallick - EXA Corp.
Satheesh Kandasamy - EXA Corp.
Hudong Chen - EXA Corp.

Abstract:
The purpose of this paper is to describe some of the technology behind the Lattice Boltzmann approach to exterior airflow simulations as incorporated into the commercial CFD code, PowerFLOW\sR. The fundamental approach used is the Lattice Boltzmann Method (LBM) coupled with both a turbulence model to recover the dissipation of sub-grid eddy scales and a wall model to allow reduced resolution in the near-wall region. A description of LBM and both models is given. Comparisons to methods that directly solve the Navier-Stokes equations, such as finite volume or finite element methods (hereafter, collectively referred to as RANS methods) are also presented.

A demonstration of the technology is presented by comparing numerical simulations with extensive experimental test data on Ford's standard calibration models. These models were originally described in SAE paper 940323.

File Size: 2533K
Product Status: In Stock

See other papers presented at SAE 2002 World Congress & Exhibition, March 2002, Detroit, MI, USA, Session: Vehicle Aerodynamics: Computational Aerodynamics (Part B)

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