Accession Number : ADA185429

Title :   A Reactive Multi-Material First Order Numerical Model for Heat Conduction in Cylindrical Coordinates,

Corporate Author : MATERIALS RESEARCH LABS ASCOT VALE (AUSTRALIA)

Personal Author(s) : Waschl, J A

PDF Url : ADA185429

Report Date : May 1987

Pagination or Media Count : 20

Abstract : A reactive multi-material, first order numerical model (known as HEAT) for heat conduction in cylindrical coordinates has been developed and tested. The model allows the inclusion of a maximum of three separate materials. A second order Taylor series expansion was employed in the development of the finite difference scheme within each single material layer. Matching conditions on the interfaces are determined to first order. The model employs a zero order Arrhenius burn function to describe the heat generated by the thermal decomposition of the reactive components. It also takes into account the latent heat of fusion for each material. External heat is introduced via a constant temperature boundary condition or a time dependent boundary condition. The model will permit restarts, although only in the cases were total decomposition of the reactive fraction has not occurred.

Descriptors :   *PROJECTILES, HEAT TRANSFER, MATHEMATICAL MODELS

Subject Categories : Ammunition and Explosives

Distribution Statement : APPROVED FOR PUBLIC RELEASE