Home > Archives > Additional Archives > Alexei Khokhlov   Alexei Khokhlov Laboratory for Computational Physics & Fluid Dynamic Naval Research Laboratory 4555 Overlook Ave., SW Washington, DC 20375-5344 ajk@lcp.nrl.navy.mil http://www.nrl.navy.mil/ Supernovae, hurricanes, and Black Holes on a fully threaded tree (FTT)   Type Ia (thermonuclear) supernovae are the brightest supernovae observed. They are increasingly used as distance indicators to measure cosmological parameters such as the Hubble constant. The mechanism of Type Ia explosions is not fully understood. First results of high-resolution, three-dimensional, adaptively refined FTT simulations of Type Ia supernovae will be presented. The results reveal a mechanism by which the strength and brightness of a Type Ia explosion may be regulated. Type Ia supernovae are but one example of a physical phenomenon which is characterized by a huge range of disparate spatial and temporal scales of complex physical processes taking place in a system. A fully threaded tree (FTT) parallel data structure will be described which allows a flexible, dynamical refinement of regular meshes on the level of individual cells. An FTT may significantly reduce the memory and CPU time requirements while obtaining well resolved solutions of various types of partial differential equations. Applications of FTT to weather forecast, to detonations, and to general relativity will be presented.
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