We perform a computational simulation of light emissions from two sonoluminescent bubbles in water. Our simulation includes the radii of two bubbles, radiation acoustic pressures, and light emission spectra by numeric...We perform a computational simulation of light emissions from two sonoluminescent bubbles in water. Our simulation includes the radii of two bubbles, radiation acoustic pressures, and light emission spectra by numerically solving the pulsing equations of a two-bubble system and the equations of gas dynamics. The simulation results demonstrate that the motion of each bubble in the two-bubble system is restrained because of the radiation acoustic pressures from the other pulsing bubble. The restrained oscillation of a bubble with a small ambient radius is stronger than that of a bubble with a large ambient radius under the same driving acoustic pressure. This effect increases when the distance between the two bubbles decreases. When compared to single-bubble sonoluminescence, the interaction between two bubbles leads to generation of different spectral characteristics.展开更多
Based on the perturbation theory and Bernoulli equation,equations of aspherical oscillation of two interacting bubbles are derived.This system is then used for the numerical investigation of the deformation of the two...Based on the perturbation theory and Bernoulli equation,equations of aspherical oscillation of two interacting bubbles are derived.This system is then used for the numerical investigation of the deformation of the two bubbles' surfaces in a spherical ultrasound field in liquid.We find that the details of the aspherical oscillation of two bubbles are shown by the analysis of a2(t) and b2(t) that describe the surface deformation of bubbles 1 and 2,respectively.展开更多
基金Project supported by the National Natural Science Foundation of China(Grant Nos.11864007 and 11564006)the Science and Technology Planning Project of Guizhou Province of China(Grant No.[2018]5769).
文摘We perform a computational simulation of light emissions from two sonoluminescent bubbles in water. Our simulation includes the radii of two bubbles, radiation acoustic pressures, and light emission spectra by numerically solving the pulsing equations of a two-bubble system and the equations of gas dynamics. The simulation results demonstrate that the motion of each bubble in the two-bubble system is restrained because of the radiation acoustic pressures from the other pulsing bubble. The restrained oscillation of a bubble with a small ambient radius is stronger than that of a bubble with a large ambient radius under the same driving acoustic pressure. This effect increases when the distance between the two bubbles decreases. When compared to single-bubble sonoluminescence, the interaction between two bubbles leads to generation of different spectral characteristics.
基金Supported by the National Natural Science Foundation of China under Grant Nos 10974095 and 11174145.
文摘Based on the perturbation theory and Bernoulli equation,equations of aspherical oscillation of two interacting bubbles are derived.This system is then used for the numerical investigation of the deformation of the two bubbles' surfaces in a spherical ultrasound field in liquid.We find that the details of the aspherical oscillation of two bubbles are shown by the analysis of a2(t) and b2(t) that describe the surface deformation of bubbles 1 and 2,respectively.
