Increased Capability and Interface for Computational Code for Implosion

This SBIR Phase II project will transform the computational capability for implosion developed under the ONR MURI and FNC programs on implosion from a research code to a reliable, high-performance, and user-friendly software for the prediction of underwater implosion. To this effect, the finite volume method with exact two-phase Riemann problems developed for the solution of highly nonlinear multi-fluid-structure interaction problems will be implemented in the CMSoft version of the flow solver AERO-F which meets industry standards of robustness and performance. The compact modeling procedure for underwater implosion developed during Phase I of this effort will be refined and implemented in the GUI AERO-I to facilitate the manual, semi-automatic, and automatic execution of one- and three-dimensional implosion analyses using efficient hydrostatic initiation procedures. The Tillotson EOS for water and support for hexahedral meshes will also be implemented in AERO-F following the feasibility studies performed during Phase I and their resulting guidelines. As an option, the CPU performance of AERO-F for the simulation of implosion will be further improved by equipping this unstructured code with a structured grids capability, and its scope will be enlarged by coupling it with the structural analyzer PARADYN. Software verification and validation will also be performed.