Multiphase flow simulation of ignition of solid explosive
- Qisu
- Duan Z.
- Nely T.
- William Brian
Ignition of a solid explosive involves chemical reaction, phase change, heat, mass and momentum transfers between the solid explosive and the product gas. To simulate the motion of the solid material Lagrangian method is needed to trace the deformation of the material. Calculation of the large deformation involved in the gas and the solid materials demands an Eulerian method to avoid mesh tangling issues that cripple conventional Lagrangian methods. To satisfy the demands for both Lagrangian and Eulerian methods, a particle-in-cell (PIC) method is adopted. While the method is computationally expensive compared to other numerical methods, it offers unique capability of combining the advantages of the Lagrangian and Eulerian treatments in handling material deformations. When the method is applied to multiphase flows, it can solve many complicated multi-material flow problems that are extremely difficult or impossible for other methods. Ignition of a solid explosive is such a problem. In the present paper we use a two-phase flow model based on available experimental data and commonly used momentum and thermal coupling models to investigate the ignition mechanisms and processes in a solid explosive material. Despite unresolved uncertainties in the model, results obtained are in qualitative agreements with experimental data.
- Research Organization:
- Los Alamos National Laboratory
- Sponsoring Organization:
- DOE
- OSTI ID:
- 977509
- Report Number(s):
- LA-UR-04-1791
- Country of Publication:
- United States
- Language:
- English
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