Effects of microhole sidewall confinement on bubble growth and bubble-generated shock waves

Dabir-Moghaddam, Navid; Wu, Benxin

doi:10.1016/j.jmapro.2016.03.005

Cited by 6 publications

(2 citation statements)

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“…2014), which may lead to non-spherical behaviour. Dabir-Moghaddam & Wu (2016), using a finite-volume approach, simulated the inertial collapse of a single bubble in a cylinder and observed increased shock pressures from the bubble collapse on the cylindrical wall relative to a single flat wall configuration. Using laser-induced experiments and the boundary-element method, the single bubble collapse between two parallel plates with a vertical plate at the end (Brujan et al.…”

Section: Introductionmentioning

confidence: 99%

“…Past studies examined nonlinear oscillations in spherically confining compliant materials (Vincent et al 2014;Vincent & Marmottant 2017) or in a tube (Oguz & Prosperetti 1998;Farhangmehr et al 2014), which may lead to non-spherical behaviour. Dabir-Moghaddam & Wu (2016), using a finite-volume approach, simulated the inertial collapse of a single bubble in a cylinder and observed increased shock pressures from the bubble collapse on the cylindrical wall relative to a single flat wall configuration. Using laser-induced experiments and the boundary-element method, the single bubble collapse between two parallel plates with a vertical plate at the end (Brujan et al 2019;Li et al 2019) or near corner (Brujan et al 2018), has been studied to determine the re-entrant jet angle dependence on the stand-off distances from the plate.…”

Section: Introductionmentioning

confidence: 99%

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Dynamics of an inertially collapsing gas bubble between two parallel, rigid walls

et al. 2022

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The collapse of cavitation bubbles in channel flows can give rise to structural damage along neighbouring walls. Although the collapse of a bubble near a single wall has been studied extensively, less is known about bubble collapse between two walls, e.g. as in a channel. We conduct highly resolved, direct simulations of the Navier–Stokes equations to investigate the bubble dynamics and pressures produced by the collapse of a bubble between two parallel rigid walls. We examine the dependence of the dynamics and pressures on the initial bubble location, confinement and driving pressure. For a fixed initial stand-off distance, as the channel width increases the bubble volume, migration distance and re-entrant jet speed approach their single-wall counterparts. We obtain an expression for the minimum channel width at which the confinement does not affect the bubble dynamics depending on the driving pressure difference and initial stand-off distance. For a fixed channel width, varying stand-off distance reduced the maximum wall pressures in the channel relative to the single wall; the trend was consistent for three different driving pressures. Two different jetting behaviours are seen when the bubble is centred in the channel, depending on the channel width. Under significant confinement, wall-parallel re-entrant jets impinge upon each other and further intensify the collapse of the vortex ring.

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Section: Introductionmentioning

confidence: 99%