Moldeling the collapse behavior of cavitation bubble in oil film under axial laminar flow

Modeling the generation and collapse of cavitation bubbles presents a formidable challenge due to the intricate nature of the physical processes involved, encompassing multifield phenomena, diverse scales, and intricate multiphase coupling. In this paper, a thermodynamic modeling is established to account for collapse behavior of bubbles in oil film, in which the effect of axial laminar flow is considered. The axial velocity and thickness of the bubble surface layer are predicted by employing the finite volume method to tackle the Navier-Stokes equation. Our results show that elevating the temperature yields an accelerated thickening of the bubble surface and an intensified axial flow, thereby resulting in a shortened cycle for bubble collapse and subsequent regeneration. The liquid pressure gradually increases during the heating process, while the rate of bubble collapse experiences a significant deceleration. Furthermore, augmenting pressure or enhancing heat dissipation within a confined volume can effectively mitigate the adverse effects stemming from cavitation bubbles. These results can serve as a useful guideline for the design and optimization of hydraulic systems.