چكيده به لاتين
According to wide range of ultrasonic waves uses in different areas in recent years, the investigation of them must be done in different aspect such as the behavior of the waves and different ways to improve their effect. One way to understand the effects and implication of the waves is simulation and modeling their behavior in different medium. by these approach we can reduce the cost of experimental analysis.
Ultrasonic waves used in this study generate cavitation bubbles, which provide critical situation by collapsing in different areas. A huge increase in temperature, when the bubble collapsed, is one of those properties that results in reaction proceed. Mixing is another effect after the collapsing of the bubble. After the collapsing and mixing, fragmentation of molecules or even discourage of some intermolecular bonding is another important effects than can be seen by propagation of wave in the medium.
By solving the equation of motion, heat and mass transfer with some simplifications, behavior of bubbles was predicted. Pressure inside the bubble that is one of the most significant effects of the use of ultrasonic waves can be obtained by these simulations.
To see how much diffusion and mass transfer occur, the number of molecules inside the bubble as the moment passed, was calculated. By modeling the bubble in specific medium, it can be possible to reach the optimum condition by changing the effecting parameters. In this study by modeling the bubble and solve the related equations, the effect of 7 different parameters was investigated. Each of these parameters by increasing or decreasing in their quantity, cause negative or positive effects. Even in some cases by changing the quantity of the parameter, the condition of the system wasn’t changed.
