Viscous Effects on Blast Wave Flowfields.
Abstract
The flow resulting from the interaction of a planar shock wave and an object on the ground was calculated with the full Navier-Stokes equations, including turbulence effects. The resulting flowfields show the development of regions of separation both before and aft of the structure, thus illustrating the importance of including turbulence and viscous effects in predicting the flowfields resulting from blast waves passing over structures. These results suffer from a need to use a coarse grid that can not adequately resolve the details of the boundary layer wall region. The use of a finer grid was not feasible due to the inordinately long computing times which would result, even to the CRAY X-MP computer. Test cases verified that implicit finite difference code, ARC2D, could accurately predict boundary layer phenomena and shock-object interaction given a sufficiently fine grid. Still the code does have its limitations and more effort is required to solve the quasi-steady flow over the structure on a wall (part of this effort would probably be an improved grid). Originator-supplied keywords include: Viscous flow, Flow fields, Blast waves, Shock waves, Flow separation, Turbulence, and Structures.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1984
- Accession Number
- ADA152013
Entities
People
- B. C. Bennett
- C. J. Wolf
- M. J. Abbett