Bubble Terms Links

The RPNNP equation, or more pertinently the nature of the link between the radial response and the pressure field described by this equation, explains the particular character of the radial pulsation of a bubble because of the presence of a term in which the square of the bubble-wall speed appears. When the acoustic pressure is very small, the bubble radius evolves proportionally to this pressure constraint. However, non-linear behavior occurs as soon as the acoustic pressure increases. Figure 16 shows the different responses of a bubble for which all the physical parameters are equal except the initial radius. Again, the analogy with a pendulum can be used, the motion of which is described by Eq. 25 ... 

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