UCRL-K-128850 PREPRINT Computed Spectral and Temporal Emissions from a Sonoluminescing Bubble Computed spectral and temporal emissions from a sonoluminescing bubble

Abstract: A sonoluminescing bubble has been modeled as a thermally conducting, partially ionized, two-component radiating plasma. The recent measurements of -100~s pulse widths by Gompf et al. are useful for constructing a consistent plasma thermal conduction model that refines our previous model. Normal thermal conduction in the gas and liquid, vapor pressure, and temperature-dependent surface tension are also included in our nonlinear hydrodynamic simulations of the growth and collapse of a gas bubble and the liquid that surrounds it. We validate the model by comparing our simulations with the experimental data of Gaitan and Holt [R, , R,, , and intensity, for different driving pressures]. We also calculate the 2D collapse of a sonoluminescing bubble in a uniform magnetic field. The numerical results show that the magnetic field induces an aspherical collapse that reduces the peak temperature in the gas and quenches SBSL. The calculated quenching is consistent with experimental data