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Two-dimensional Numerical Simulation of Bubble Bursting in the Vicinity of a Corner, Using DIM Interfacial Modeling

Safavi, Mohammad Mahdi | 2020

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 53411 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Taeibi Rahni, Mohammad; Salimi, Mohammad Reza
  7. Abstract:
  8. Bubble collapse is a two-phase problem whose numerical simulation has many important applications in science and technology. In hydrodynamics systems (pumps, ship propellers, …), bubbles form due to cavitation. These bubbles grow and collapse These bubbles grow and collapse farther downstream and their energy destroys the surrounding walls. In medical sciences, the shear force caused by collapse of a bubble can be used to destroy adipose tissues in arteries. The small scales time in this phenomenon, as well as the compressibility of the flow in bubble collapse, are interesting challenges researchers face. The present thesis targets are two-dimensional numerical simulation of bubble collapse process in the vicinity of a corner with different angle. The main innovation of this research is the study of the jet resulting from the collapse of a bubble in the vicinity of a corner. Our mathematical model is Kapila (a 5-equation model), in which the viscosity effects are neglected. Finite Volume Method, and HLLC flux solver are used. At last, to increase the accuracy of the simulation, the MUSCL-Hancock method was used. As a result of numerical simulation, the bubble divides in two pieces by the a high-velocity liquid jet and since the bubble is located near a corner with solid boundaries, the statice pressure in solution domain will be significantly raised
  9. Keywords:
  10. Numerical Modeling ; Two Phase Flow ; Two Dimentional Simulation ; Diffuse Interface ; Bubble Bursting in a Corner ; Diffuse Interface Method

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