Applications of computational modeling in ballistics

The development of the technology of ballistics as applied to gun launched Army weapon systems is the main objective of research at the U.S. Army Ballistic Research Laboratory (BRL). The primary research programs at the BRL consist of three major ballistic disciplines: exterior, interior, and terminal. The work done at the BRL in these areas was traditionally highly dependent on experimental testing. A considerable emphasis was placed on the development of computational modeling to augment the experimental testing in the development cycle; however, the impact of the computational modeling to this date is modest. With the availability of supercomputer computational resources recently installed at the BRL, a new emphasis on the application of computational modeling to ballistics technology is taking place. The major application areas are outlined which are receiving considerable attention at the BRL at present and to indicate the modeling approaches involved. An attempt was made to give some information as to the degree of success achieved and indicate the areas of greatest need

Temperature wake in an adverse pressure gradient

June 1961Also issued as: Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1961Includes bibliographical referencesA study is made of the flow pattern resulting from the presence of a temperature wake in a uniform velocity field subjected to various adverse pressure gradients. Dimensionless temperature profiles and velocity profiles are presented. A velocity defect appears in the region of high temperature, and the magnitude of the adverse pressure gradient over the range investigated has no effect on the spreading of the temperature wake. A simple theoretical approach is presented which correlates well with the experimental results. The implications of the experimental results and the theoretical approach are discussed with reference to an axial compressor with a temperature wake in the fluid stream at the inlet.Under the Sponsorship of: General Electric Company and Westinghouse Electric Corporatio

Computer Methods in Applied Mechanics and Engineering 190 (2000) 263–277 1 Comments on CFD Code Performance on Scalable Architectures

We comment on the current performance of computational fluid dynamics codes on a variety of scalable computer architectures. The performance figures are derived from both the finite volume and finite element methodologies, and encompass shared, virtual shared, and distributed memory architectures, as exemplified by the SGI Origin series, CM5, and the CRAY T3D/E family, respectively. 1