A Numerical Study On The Dynamics Of Bubble Growth And Detachment From An Orifice




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Mechanical Engineering


The study of bubble formation from an orifice finds numerous industrial applications which include bubble acoustics in ocean physics and chemical reactors. Numerical simulations have been performed to investigate the dynamics of bubble formation, growth and detachment from an orifice. The full transient Navier - Stokes equation is solved in a two-dimensional axi-symmetrical coordinate system. The surface tension implementation algorithm known as the Pressure Boundary Method (PBM) is used to model the surface tension. The robustness of PBM method on Two-Phase flows with different conditions has been shown. The results achieved by numerical simulations have been compared with the available experimental data for accuracy. Parametric studies have been done on the flow rates and inlet velocity profiles. The effect of fluid properties like density, surface tension, viscosity and gravity on bubble formation and growth has been studied. The conditions required for the formation of double-periodic bubbles have been emphasized. The theoretical approach to the phenomenon of bubble formation process has been given. The results obtained in the present study are in good agreement with the experimental results provided in literature.