Mapping Local Cavitation Events in High Intensity Ultrasound Fields

V. Raman [1], A. Abbas[2], and S.C. Joshi[2]
[1] Indian Institute of Technology, Madras
[2] Nanyang Technological University, Singapore

The linear acoustic pressure field is obtained by solving the homogenous Helmholtz equation using COMSOL Multiphysics.

The pressure field is used to calculate the collapse pressure of the transient cavitation bubbles by using the cavity cluster approach. The regions where the local pressure exceeds the Blake threshold are potential regions of transient cavitation events.

The ultrasound intensity distribution is calculated from the pressure field distribution. This provides a prediction across the geometry of active cavitation zones which are crucial for the optimization of sonochemical reactors.