Comparison and validation of compressible flow simulations of laser-induced cavitation bubbles

Abstract

The numerical simulation of compressible two-phase fluid flows exhibits severe difficulties, in particular, when strong strong variations in the material parameters and high interface velocities are present at the phase boundary. Although several models and discretizations have been developed in the past, a thorough quantitative validation by experimental data and a detailed comparison of numerical schemes are hardly available. Here, two different discretizations are investigated, namely, a non-conservative approach proposed by Saurel and Abgrall [SIAM J Sci Comput 1999;21:1115] and the real ghost fluid method developed by Tang et al. [SIAM J Sci Comput 2006;28:278]. The validation is performed for the case of laser-induced cavitation bubbles collapsing in an infinite medium. For the computations, initial data are deduced implicitly from the experimental data. In particular, the influence of numerical phase transition caused by smearing of the phase boundary is investigated.