Abstract:

Thermal effect is one of major mechanisms for the interactions between power ultrasound and liquid media. In order to reveal the temperature variation of solution irradiated by power ultrasound in an open system , a differential equation describing the heat balance during the ultrasound propagation through the liquid was founded and solved based on the principles of ultrasonic energy absorption and heat transfer , and a mathematical model de-scribing the solution temperature was derived according to the ultrasonic parameters and the solution features. More-over, experiments were performed to reveal the temperature variation of phosphate solution irradiated by the ultra-sound with various intensities , and the temperature model for the same solution irradiated by ultrasonic was united ,with the parameters of the model being also determined. Tested results show that the equation describing the tem-perature of bulk solution , which is derived from the ultrasonic intensity and the duration of ultrasound irradiating ,fits well with the experimental data.

Key words: power ultrasound, temperature, thermal effect, mathematical simulation, phosphate