Development of a fully automated CFD system for three-dimensional flow simulations based on hybrid prismatic-tetrahedral grids

Conference · Tue Dec 31 04:00:00 EST 1996

OSTI ID:416578

Berg, J.W. van der; Maseland, J E.J.; Oskam, B ^[1]

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1. National Aerospace Lab., Amsterdam (Netherlands)

In this paper an assessment of CFD methods based on the underlying grid type is made. It is safe to say that emerging CFD methods based on hybrid body-fitted grids of tetrahedral and prismatic cells using unstructured data storage schemes have the potential to satisfy the basic requirements of problem-turnaround-time and accuracy for complex geometries. The CFD system described in this paper is based on the hybrid prismatic-tetrahedral grid approach. In an analysis it is shown that the cells in the prismatic layer have to satisfy a central symmetry property in order to obtain a second-order accurate approximation of the viscous terms in the Reynolds-averaged Navier-Stokes equations. Prismatic grid generation is demonstrated for the ONERA M6 wing-alone configuration and the AS28G wing/body configuration.

• OSTI ID: 416578
• Report Number(s): CONF-960489--
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
99 GENERAL AND MISCELLANEOUS
AIRFOILS
ALGORITHMS
FLOW MODELS
MESH GENERATION
NAVIER-STOKES EQUATIONS
THREE-DIMENSIONAL CALCULATIONS