Propagation of Shock Waves in Dilute Bubbly Liquids

Abstract

Transient shock wave phenomena in a liquid containing noncondensable gas bubbles are investigated experimentally and numerically. In the experiment, using a vertical shock tube, the time evolution of the propagation velocity and the waveform are successfully measured. In the numerical analysis, the thermal condition of the bubble interior is directly simulated by using full equations for mass, momentum and energy conservations, and the results are combined to simulate shock waves in bubbly liquids. Relative translational motion between the bubbles and the liquid is also taken into account. Comparison between the numerical results and the experimental ones shows that there is a discrepancy of the period of pressure oscillation behind the shock front, even though the rough feature of both pressure profiles agrees well.