With the consideration of surface tension the boundary integral method and numerical solution method for simulation of a cavitation bubble collapsing near a rigid wall are derived.

Phenomenons such as high temperature and high pressure resulting from the collapse of the transient cavitation bubbles are responsible for all the observed effects of ultrasound.

As compared as solid particles, the main advantages of emulisified air bubbles are as follows.

The article is aimed at the problem that the air bubble is probably occurred during the process of the blood collecting, reverse transporting and ingredient separating with the P.

The practice of air foam clockwise circulating and percussion drilling in the Africa;

Study on enhanced oil recovery by air foam flooding

Experiment of improved oil recovery by air foam injection low temperature oxidation process

The instantaneous axisymmetric flow field,the hydrodynamics characteristics of missile and the evolution of ventilated cavity are derived.

It is confirmed that the ventilated cavity around a vehicle with gravity effect will move toward its tail due to the interaction with trailing cavity, and the cross section of cavity deforms along the vehicle and appears crescent shape downstream.

The ventilated cavity flow in a static pressure gradient field of gravity force was simulated based on continuous equation,momentum equation,energetic equation,state equation and standard k-ε equation.