Influence of the Liquid Pressure on Collapse of a Vapor Bubble in Hot Acetone

Resumo

Compression of the content of a vapor cavitation bubble during its collapse in hot acetone is studied. The temperature of liquid is 419 K, its pressure is varied in the range from 15 to 150 bar. A realistic model is used, in which the dynamics of vapor in the bubble and of the surrounding liquid is governed by the gas dynamics equations. The nonstationary heat conductivity of vapor and liquid, and the non-equilibrium heat and mass transfer across the bubble surface are taken into account. Wide-range equations of state are applied. It is shown that as the liquid pressure increases, three scenarios of the bubble content compression are successively realized. In the first scenario, the compression is nearly uniform. In the second and third scenarios, the bubble content is compressed by radially convergent isentropic and shock waves, respectively. The shock wave scenario, which arises starting with a pressure of about 90 bar, is realized in three versions.