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Numerical studies of cavitation erosion on an elastic-plastic material caused by shock-induced bubble collapse

Numerical studies of cavitation erosion on an elastic-plastic material caused by shock-induced bubble collapse
Numerical studies of cavitation erosion on an elastic-plastic material caused by shock-induced bubble collapse
We present a study of shock-induced collapse of single bubbles near/attached to an elastic-plastic solid using the free-Lagrange method (FLM), which forms the latest part of our shock-induced collapse studies. We simulated the collapse of 40 um-radius single bubbles near/attached to a rigid and aluminium walls by a 60 MPa-lithotripter shock for various scenarios based on bubble-wall separations, and the collapse of a 255 um-radius bubble attached to an aluminium foil with a 65 MPa-lithotripter shock. The coupling of the multi-phases, compressibility, axisymmetric geometry and elastic-plastic material model within a single solver has enabled us to examine the impingement of high speed liquid jets from the shock-induced collapsing bubbles, which imposes an extreme compression in the aluminium that leads to pitting and plastic deformation. For certain scenarios, instead of the high speed jet, a radially inwards flow along the aluminium surface contracts the bubble to produces a ‘mushroom shape’. This work provides methods for quantifying what parameters (e.g. bubble sizes and separations from the solid) might promote or inhibit erosion on solid surfaces.
cavitation, cavitation bubbles, cavitation erosion, lithotripsy, EROSION, free-lagrange method, shock-induced bubble collapse,, Computational Fluid Dynamics
1364-5021
Turangan, Cary
a619c49a-66dd-4bf0-b5c3-0f26ae4d95e7
Ball, Graham
1fddee48-5d86-4e7b-9d44-3fdcf8bf1281
Jamaluddin, A.R.
4048f6c9-8d2a-4938-b370-0fe7c8da009e
Leighton, Timothy
3e5262ce-1d7d-42eb-b013-fcc5c286bbae
Turangan, Cary
a619c49a-66dd-4bf0-b5c3-0f26ae4d95e7
Ball, Graham
1fddee48-5d86-4e7b-9d44-3fdcf8bf1281
Jamaluddin, A.R.
4048f6c9-8d2a-4938-b370-0fe7c8da009e
Leighton, Timothy
3e5262ce-1d7d-42eb-b013-fcc5c286bbae

Turangan, Cary, Ball, Graham, Jamaluddin, A.R. and Leighton, Timothy (2017) Numerical studies of cavitation erosion on an elastic-plastic material caused by shock-induced bubble collapse. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 473 (2205), [20170315]. (doi:10.1098/rspa.2017.0315).

Record type: Article

Abstract

We present a study of shock-induced collapse of single bubbles near/attached to an elastic-plastic solid using the free-Lagrange method (FLM), which forms the latest part of our shock-induced collapse studies. We simulated the collapse of 40 um-radius single bubbles near/attached to a rigid and aluminium walls by a 60 MPa-lithotripter shock for various scenarios based on bubble-wall separations, and the collapse of a 255 um-radius bubble attached to an aluminium foil with a 65 MPa-lithotripter shock. The coupling of the multi-phases, compressibility, axisymmetric geometry and elastic-plastic material model within a single solver has enabled us to examine the impingement of high speed liquid jets from the shock-induced collapsing bubbles, which imposes an extreme compression in the aluminium that leads to pitting and plastic deformation. For certain scenarios, instead of the high speed jet, a radially inwards flow along the aluminium surface contracts the bubble to produces a ‘mushroom shape’. This work provides methods for quantifying what parameters (e.g. bubble sizes and separations from the solid) might promote or inhibit erosion on solid surfaces.

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More information

Accepted/In Press date: 11 August 2017
e-pub ahead of print date: 13 September 2017
Published date: September 2017
Keywords: cavitation, cavitation bubbles, cavitation erosion, lithotripsy, EROSION, free-lagrange method, shock-induced bubble collapse,, Computational Fluid Dynamics

Identifiers

Local EPrints ID: 412916
URI: http://eprints.soton.ac.uk/id/eprint/412916
ISSN: 1364-5021
PURE UUID: edfbbf34-e80a-4c6e-8e67-e660ad49fbdc
ORCID for Timothy Leighton: ORCID iD orcid.org/0000-0002-1649-8750

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Date deposited: 08 Aug 2017 16:31
Last modified: 18 Feb 2021 16:41

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Contributors

Author: Cary Turangan
Author: Graham Ball
Author: A.R. Jamaluddin

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