Prevention of pressure oscillations in modeling a cavitated acoustic fluid

摘要

Cavitation effects play an important role in the UNDEX loading of a structure. For farfieldUNDEX, the structural loading is affected by formation of local and bulk cavitationregions, and a pressure pulse resulting from the closure of the cavitation region. A commonapproach to numerically modeling cavitation in far-field underwater explosions is usingCavitating Acoustic Finite Elements (CAFE) and more recently Cavitating AcousticSpectral Elements (CASE). Treatment of cavitation in this manner causes spuriouspressure oscillations which must be treated by a numerical damping scheme. The focus ofthis paper is to investigate a new method, based on the original Boris and Book Flux-Corrected Transport algorithm [1], to limit oscillations without the energy loss associatedwith the current damping scheme.