Simulation Of Sympathetic Detonation By A
CIP Eulerian Code
Author(s)
S. Kubota, Z. Liu, T. Saburi, Y. Ogata & M. Yoshida
Abstract
We have developed the two-dimensional Eulerian hydrodynamic code to
estimate various explosion phenomena which include large deformation, multimaterial
flow and the shock initiation process. The CIP method has been adopted
to reduce numerical diffusion caused by calculation of the advection term in the
Euler equations. To solve the initiation process of energetic material, an ignition
and growth model has been employed. In this study numerical simulations of
sympathetic detonation in the gap test were carried out. The charge diameter and
gap length were varied to understand the size effect on the sympathetic
detonation. We found that the critical gap length and the charge weight
approximately have a linear relationship with a logarithmic scale.
Keywords: Eulerian hydrodynamic code, CIP method, ignition and growth
model, gap test, sympathetic detonation.
1 Introduction
The practical problems for the risk assessment of the energetic materials include
various complicated phenomena, large deformation of the materials, multimaterial
flows and the chemical reaction of energetic materials. For the problems
that include the materials interfaces, the Lagrangian coordinate system is suitable
to simulate the phenomena. However for solving the large deformation process
of material the Lagrangian method encounter the difficulty because of the mesh
crashes, and therefore we have selected the Eulerian coordinate system in our
CFD code [1, 2]. In this case the two major problems remain. One is how to
prevent the large numerical diffusion occurred by calculation of advection term
Keywords
Eulerian hydrodynamic code, CIP method, ignition and growth
model, gap test, sympathetic detonation.
Related Book
Other papers in this volume
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