Development of Time Resolved Technique to Infer 1-Dimensional Magnetic Field Distributions from Zeeman Broadened Lines

The task of computationally simulating the dispersion and/or neutralization of toxic chemical/biological (CB) agents, released from weapons of mass destruction (WMD), puts a very high demand on the capability of current generation computational dynamics(CFD) codes. Current advanced computational tools for WMD threat simulation fail to address all the necessary physics, do not incorporate emerging computational techniques nor do they take full advantage of the latest scalable, computer hardware. Under theproposed effort, a modern finite-element based unstructured,, fully implicit Navier-Stokes code, entitled CRUNCH, which is optimized for operation on scalable parallel platforms, will be utilized as the basis for developing a tool for simulating WMD threatagainst population centers. CRUNCH embodies multi-phase physics, advanced turbulence modeling, grid adaptation, generalized chemical kinetics and employs Godunov-based robust numerics with low Mach number pre-conditioning. Innovations such as domaindecomposition, load balancing, GUI-driven pre-/post-processing utilities and finally, programming in High Performance Fortran (HPF), C++ and JAVA, provide an ideal, next-generation platform to begin assessment of requirements for performing WMD threatsimulations. The Phase I effort will proceed directly to the environment of actual interest, and application to representative WMD problems will provide preliminary identification of computational and physics requirements.The next generation CFD, developedfor WMD studies, will have superior physics and computational capabilities, which are optimized for modern, scalable architectures. The innovations proposed will provide applicability well beyond WMD threat simulation ranging from high-speed aerodynamics,missile aero-propulsion, blasts and explosives, etc. to low-speed hydrodynamics, pollutant dispersion, chemical reactors, etc.