Numerical Simulation of Liquid Jet and Bubble Collapse Interaction near the Wall<br/>

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Numerical Simulation of Liquid Jet and Bubble Collapse Interaction near the Wall

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 56205 (45)
University: Sharif University of Technology
Department: Aerospace Engineering
Advisor(s): Javadi, Khodayar
Abstract:
Bubble collapse near a rigid wall with rapid and non-spherical compression of the internal gas can lead to destructive and unfavorable effects such as erosion, noise, and a fall-off in the performance of devices. Despite the fact that several investigations on this phenomena have been carried out under various conditions, studies indicate that the collapse of a single cavitation bubble next to the liquid jet injected from the wall's side and their interaction have not been studied so far. To achieve this goal, the present study deals with the three-dimensional simulation of the two-phase flow field from the Eulerian point of view. OpenFOAM has been used to solve the equations of conservation of mass and momentum in a compressible flow by a coupled finite volume method. The dynamics of the present phenomenon are discussed, along with the effects of the maximum pressure and shear stress on the wall in relation to radius, injection jet velocity, and bubble-to-wall distance. In general, the jet injection causes a significant reduction in shear stress and maximum pressure compared to a case without jet injection
Keywords:
Cavitation Bubble ; Collapse Analysis ; Combustion Jet Injection ; Two Phase Flow ; Cavitation ; Numerical Simulation ; Liquid Jet-Bubble Collapse Interaction