Fig. 2.
Dynamics of a model microbubble near a rigid wall (model III). (A and B) A free bubble with equilibrium diameter of 3 μm that pulsates in an ultrasound field with two frequencies 1 MHz and 2.79 MHz (the resonance frequency for 3 μm diameter) and PA = 0.1 MPa at (A) a distance of 12 μm (in blue) and (B) 2.35 μm (in red) between the bubble center and the wall. (C) Prediction of the bubble radius (R) variations in time for 1 MHz (solid blue line) and for 2.79 MHz (dashed blue line). (D) Pressure pulse at infinity (black line) and at the wall just below the pulsating bubble for distance of 2.35 μm (red line) and 12 μm (blue line) between the bubble center and the wall. (E) pressure pulse at infinity (dashed black line) and 12 μm (dashed blue line) between the bubble center and the wall.