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A Grid Generating System for Automobile Aerodynamic Analysis
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English
Abstract
This paper describes a new grid generating system particularly designed for automobile external flow analyses. The system consists of three major parts as follows: Part I collects the geometrical data of the automobile surface and develops an intermediate grid. Part II generates the surface grid on the surface of the automobile. The surface grid is used as the boundary condition for generating the three-dimensional grid for the flow space. Part III generates the three-dimensional grid for external flow analyses. In generating the surface grid, a new approach of generating grid has been developed, in which two elliptic grid generation equations are solved directly on the physical domain. The three-dimensional grid is generated by the elliptic grid generation method blended with the hyperbolic method. An iterative solution algorithm based on the approximate factorization scheme has been developed.
Authors
Citation
Nakamura, S., Spradling, M., Fradl, D., and Kuwahara, K., "A Grid Generating System for Automobile Aerodynamic Analysis," SAE Technical Paper 910598, 1991, https://doi.org/10.4271/910598.Also In
References
- Nakamura, S. Applied Numerical Methods with Software Prentice Hall Englewood Cliffs, NJ 1991
- Nakamura, S. Fradl D. Kuwahara K. “Mapping of Curved Surfaces onto a Side Boundary of the Three-dimensional Computational Grid Using Elliptic Partial Differential Equations,”
- Thompson, J. F. Thames, F. C. Mastin, C. W. “Boundary-fitted Curvilinear Coordinate Systems for Solutions of Partial Differential Equations on Fields Containing any Arbitrary Two-dimensional Bodies,” NASA CR 2729 1977
- Shieh, C. F. “Three Dimensional Grid Generation Using Poisson Equations” Numerical Grid Generation Thompson, J. F. Elsevier Science Publishing Co. 1982
- Steger, J. L. “Generation of Three Dimensional Body Fitted Grids by Solving Hyperbolic Partial Differential Equations” NASA TM 101069 1989
- Rizk, Y. M. Steger J. L. Chaussee D. Use of Hyperbolic Grid Generation Scheme in Simulation Supersonic Viscous Flow About Three-dimensional Winged Configurations Proceedings, International Symposium on Computational Fluid Dynamics-Tokyo Sept. 9-12 Tokyo, Japan
- Nakamura, S. Suzuki M. “Noniterative Three Dimensional Grid Generation Using a Parabolic Hyperbolic Hybrid Scheme” AIAA 87 0277, AIAA 25th Aerospace Sciences Meeting Reno, NV 1987
- Spradling, M. Nakamura S. Kuwahara K. “Application of Elliptic Grid Generation Equations Blended with Hyperbolic Method to Three-dimensional Grid for Vehicle Aerodynamics Analyses,”