This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Exterior Airflow Simulations Using a Lattice Boltzmann Approach
ISSN: 0148-7191, e-ISSN: 2688-3627
Published March 04, 2002 by SAE International in United States
Annotation ability available
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®. 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 .
CitationLietz, R., Mallick, S., Kandasamy, S., and Chen, H., "Exterior Airflow Simulations Using a Lattice Boltzmann Approach," SAE Technical Paper 2002-01-0596, 2002, https://doi.org/10.4271/2002-01-0596.
- Willams, J. Quinlan W. Hackett J. Thompson S. Marinaccio T. Robertson A. “A Calibration Study of CFD for Automotive Shape and Cd” SAE 940323 1994
- Lietz, R. Pien, W. Remondi, S. “A CFD Validation Study for Automotive Aerodynamics” SAE 00PC-229 2000
- Teixeira, C. “Continuum Limit of Lattice Gas Fluid Dynamics” MIT 1992
- Alajbegovic, A. Teixeira, C. Hill D. Anagnost, A. “The Study of Benchmark Laminar Flows using Digital Physics” ASME Fluids Engineering Division Summer Meeting 1997
- Anagnost et al “Digital Physics Analysis of the Morel Body in Ground proximity” SAE 970139 1997
- Alajbegovic, A. Anagnost, A. Hill D. Teixeira, C. Molvig, K. “Digital Physics Analysis of the Morel Model” MIRA Aerodynamics Conference UK 1996
- Bickerton, J.E. Graysmith, J.L. Howell, J.P. Haynes, T.L. “The CFD Investigation of Flow Separation over a Simple Vehicle Model” ISATA Italy 1996
- Chen, C.H. Teixeira, C. Molvig, K. “Digital Physics Approach to Computational Fluid Dynamics: Some Basic Theoretical Features” International Journal of Modern Physics C 8 4 675 684 1994
- Huang, K. “Statistical Mechanics” 2nd John Wiley & Sons 1987
- Chen, H. Chen, S. Matthaeus, W. “Recovery of the Navier-Stokes equations using a lattice-gas Boltzmann method” Phys. Rev. A 45 8 1992
- Qian, Y. d'Humieres, D. Lallemand, P. “Lattice BGK Models for Navier-Stokes Equations” Europhys. Lett. 17 1992
- Teixeira, C. “Incorporating Turbulence Models into the Lattice-Boltzmann Method” Intl. J. Mod. Phys. C 9 8 1998
- Schlichting, H. “Boundary Layer Theory” 7th McGrawHill 1979
- Yakhot, V. Orszag, S.A. “Renormalization Group Analysis of Turbulence, I. Basic Theory, J. of Scientific Computing” 1 1 51 1986