Modeling of the temperature increase in ultrasonic transducers

The thermal source profile was calculated in the case of an axisymmetric ultrasonic transducer. Coupled with a thermal diffusion equation, these results allow us to calculate the 2D temperature field in the electrical harmonic or pulse regime, but in thermal steady state. Experimental temperature measurements of a transducer in the MHz range are found to be in agreement with theory. Finally, simulation results on a piezocomposite-based single-element transducer dedicated to ultrasonic surgery are presented and discussed for different conditions of use.