title: Interaction of two oscillating sonoluminescence bubbles in sulfuric acid.
abstract: The mutual interaction of two oscillating gas bubbles in different concentrations of sulfuric acid is numerically investigated. A nonlinear oscillation for spherical symmetric bubbles with equilibrium radii smaller than 10 μm at a frequency of 37 kHz in a strong driving acoustical field P(a)=1.8 bar is assumed. The calculations are based on the investigation of the secondary Bjerknes force with regard to adiabatic model for the bubble interior which appears as repulsion or attraction interaction force. In this work the influence of the various concentrations of sulfuric acid in uncoupled and coupled distances between bubbles has been investigated. It is found that the sign and value of the secondary Bjerknes force depend on the sulfuric acid viscosity and its amount would be decreased by liquid viscosity enhancement. The results show that big change in the parameters of produced bubbles occurs in the sulfuric acid with concentrations from 65% to 85%.
authors.affiliation: Department of Physics, Sharif University of Technology, Tehran, Iran. sadighi@sharif.ir
authors.forename: Rasoul
authors.initials: R
authors.lastname: Sadighi-Bonabi
authors.forename: Nastaran
authors.initials: N
authors.lastname: Rezaee
authors.forename: Homa
authors.initials: H
authors.lastname: Ebrahimi
authors.forename: Mona
authors.initials: M
authors.lastname: Mirheydari