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Center for Nonlinear Studies |
Simulations of multi-component fluid instabilities benefit greatly from front tracking to supply complicated interface geometries. The interface allows the instabilities to be sharp and may introduce extra detail in the state solution near the interface. Adaptive mesh refinement (AMR) is another method used with fluid instabilities in which levels of finer numerical grids are inserted in regions such as shock fronts or material interfaces where greater resolution is required, and a coarse mesh is provided in areas where less refinement is needed. To couple front tracking and AMR we use a patch based AMR software, SAMRAI, and the FronTier front tracking software. By enforcing sufficient refinement near the interface the interface always exists inside the finest level of refinement. On the finest level, front tracking algorithms and related solvers operate as they would on any regular grid. However, special front tracking consideration are required at patch boundaries. Extra AMR requirements are also needed to ensure that solvers containing finest level patches with an interface are aware of its presence during solves.
Host: Mikhail Shashkov. shashkov@lanl.gov, 667-4400