This technology will provide NASA with an advanced simulation capability for two phase flows in solid motors with dynamic grain recession, including burning surface particulate injection and volume and mass flow constraints for the receding propellant, to support simulations of launch abort motors, RSRMV, and SLS. NASA customers, such as Wallops Island Launch Facility and the Missile Defense Agency, would also benefit from their use of this innovative technology. Future upgrades to extend the simulation capabilities of commercial interest to NASA would also be possible, including improved droplet/gas interface modeling for better statistical representations of particle laden flows, improved near-wall turbulence modeling, and extended model validation for commercial space launch systems. Future innovation involving our models for material heating and surface mesh recession would also allow treatment of external surface heating and ablation phenomena that are typical of entry, descent, and landing scenarios. The growing trend toward complex multi-phase solid rocket motor and launch simulations is creating opportunities for enabling analysis tools in the commercial aerospace market. The ability to analyze these difficult problems in a timely manner will allow the commercial launch industry to reduce costs and increase reliability of access to space. DoD and commercial applications include small and medium solid motors, launch simulations, and stage separation. Additional physical modules, such as upgraded Large Eddy Simulation and turbulence-combustion interaction models, could be developed to address specific commercial opportunities with the basic architecture of the software remaining the same.