Dynamics and heat transfer of gas bubbles in acoustic field

Abstract EN

A new model of bubble dynamics in acoustic field is constructed, including effect of heat transfer at bubble wall.

The temperature inside the bubble is calculated by solving the energy equation of the gas inside the bubble (using finite difference method).

The liquid temperature at bubble wall is numerically calculated by assuming an exponential profile of liquid temperature.

It is including effect of thermal conduction at bubble wall.

Calculations are performed for adiabatic model.

The results reveal that the effect of heat transfer is considerable on bubble dynamics.

The calculated results fit with the experimental data of radius-time curve much more satisfactorily than those by the adiabatic model (without heat transfer).

It is clarified that the effect of heat transfer stabilizes bubble oscillations.