# Accession Number:

## ADA218586

# Title:

## Numerical Modelling of Shocks in Gases and Metals

# Descriptive Note:

## Research rept.

# Corporate Author:

## MATERIALS RESEARCH LABS ASCOT VALE (AUSTRALIA)

# Personal Author(s):

# Report Date:

## 1989-01-01

# Pagination or Media Count:

## 47.0

# Abstract:

Results are presented for a range of one-dimensional shock wave problems in gaseous and metallic materials. These problems were solved numerically using Flux-Corrected Transport FCT. FCT is a numerical technique which achieves high resolution without non-physical oscillations, especially in regions of steep gradients such as shock fronts. These types of problem involve solving the Eulerian inviscid fluid flow equations, namely the continuity equation, conservation of momentum and conservation of energy, with an appropriate equation of state. For gaseous materials the ideal gas equation of state was used and for metallic materials the stiffened-gas or the Mie- Gruneisen equation of state. Shock wave problems in gases included the one- dimensional shock tube problem, a shock wave hitting a density discontinuity and shocks of equal magnitude colliding. Using the stiffened-gas equation of state and the Mie-Gruneisen equation of state similar types of problems were solved for metallic materials, for example, a shock propagating through a piece of metal. A discussion of the performance of FCT to accurately model these problems is given. Currently work is being done on adding elastic-plastic or viscous terms and heat conduction terms to the fluid flow equations, to improve the description of flow in a solid material. Keywords Shock mechanics, Blast effects, Shock fronts, Australia.

# Descriptors:

- *SHOCK(MECHANICS)
- *SHOCK WAVES
- *GASES
- *METALS
- SOLIDS
- HIGH RESOLUTION
- EXPLOSION EFFECTS
- REGIONS
- WAVE PROPAGATION
- THERMAL CONDUCTIVITY
- FLOW
- NUMERICAL METHODS AND PROCEDURES
- CONSERVATION
- EQUATIONS
- CONTINUITY
- DISCONTINUITIES
- AUSTRALIA
- INVISCID FLOW
- VISCOUS FLOW
- ENERGY CONSERVATION
- BLAST
- MOMENTUM
- COLLISIONS
- EQUATIONS OF STATE
- FLUID FLOW
- GRADIENTS
- ONE DIMENSIONAL
- MATERIALS
- DENSITY
- SHOCK TUBES
- REPRINTS

# Subject Categories:

- Properties of Metals and Alloys
- Fluid Mechanics