Cavitation caused by an elastic membrane deforming under the jetting of a spark-induced bubble

A new and interesting phenomenon is found during the interaction between cavitation bubbles and elastic membranes: The collapse of the spark-induced bubble generates a high-speed jet. When the jet impacts the elastic membrane, significant membrane deformation occurs, accompanied by secondary cavitation. To analyze the mechanism of the secondary cavitation, fluid acceleration is introduced through PIV experiments to define the dimensionless inertial force. Secondary cavitation is triggered when the dimensionless inertial force surpasses the dimensionless pressure difference.