The simulation of cavitating flows induced by underwater shock and free surface interaction

• Autores: W.F. Xie, T. G. Liu, B. C. Khoo
• Localización: Applied numerical mathematics, ISSN-e 0168-9274, Vol. 57, Nº. 5-7, 2007, págs. 734-745
• Idioma: inglés
• DOI: 10.1016/j.apnum.2006.07.014
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• Resumen

  • An underwater explosion near a free surface constitutes an explosive gas¿water¿air system with a shock and free surface interaction and the presence of bulk cavitation region. This paper applies a simplified modified ghost fluid method [T.G. Liu, et al., Comm. Comput. Phys. 1 (2006) 898] to simulate the explosive gas¿water and water¿air interfaces and an isentropic one-fluid cavitation model [T.G. Liu, et al., J. Comput. Phys. 201 (2004) 80] to describe and capture the unsteady cavitation just below the free surface. It is found that the proposed ghost fluid method can accurately simulate the gas¿water/water¿air compressible flows with the wave interaction at the interfaces and the deformation of the free surface. The isentropic one-fluid cavitation model, on the other hand, is capable of simulating the dynamic creation and evolution of the bulk cavitation below the free surface.