Simulation of solidification process for DNAN-based melt-cast explosives

In order to simulate the pouring and solidification process of DNAN based melt-cast explosives, flow and thermal fields were calculated using structured mesh, and stress field was calculated using unstructured mesh. This numerical scheme can obtain an accurate interface between solid and liquid, reasonable shrinkage and stress data. By comparison research, on the condition of certain mould and charge size, the optimized scheme for DNAN-based melt-cast explosives is that thermal insulation on upper mould surface for an hour with 30°C water on lower mould surface, in order to decrease shrinkage, thermal stress value and solidification time by overall consideration.