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Numerical Simulation of Two-dimensional Sonoluminescence Phenomenon, Using Front Tracking/Ghost Fluid Method

Moezzi Rafie, Hamid | 2015

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 47845 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Tayyebi Rahni, Mohammad
  7. Abstract:
  8. Sonoluminescence is a unique phenomenon in physics, which is known as the process of converting sound into light. By applying sound to a volume of liquid, with a specific geometrical shape (such as sphere) and forming standing waves around an existing bubble, the bubble first expands to a maximum radius and then gets extremely small leading to its supersonic collapse. During the collapse, the resulting shock wave approches the center of the bubble, causing extreme increase in the pressure and temperature at the center of the bubble. This causes flashing of light during small time scales (pico-seconds). This phenomenon is used in many fields, such as treatment of cancer. Also, the energy output (large amount) can hopefully be used as a clean energy resource in the future. The purpose of this research is to better understand this phenomenon. To this end, its two-dimensional model has been simulated, using the Euler equations for the first time. In this simulation two numerical schemes, namely front-tracking and ghost-fluid methods have both been used for accurate tracking of the interface between the two fluids. After applying the appropriate boundary conditions, sonoluminescence was somehow observed and 640 ˚K temperature and 760 Kpa pressure at the center of the bubble were achieved
  9. Keywords:
  10. Bubble Dynamic ; Numerical Simulation ; Two Phase Flow ; Sonoluminescence ; Bubble Dynamic ; Euler Equation

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