Effects of Viscoelasticity of Non-Newtonian Fluid on Bubble Collapse
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Abstract:
The phenomenon of cavitation has been found in many engineering plants. In order to investigate the viscoelastic effects of bubbles near a rigid boundary, a mathematical model and governing equation were developed based on the example of 5% polyacrylamide (PAM) water solution. The boundary integral method was used to solve the governing equation and the cubic spline function was used to characterize the bubble surface. Furthermore, the bubble dynamics phenomena were studied in this paper, including the occurrence of bubble oscillation, jet position of bubble, and the turbulence of fluid on jet velocities. The results showed that viscoelasticity of the bubble can restrain the formation of liquid jet, thereby reducing the cavitation damage.
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