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Supersonic air flow due to solid-liquid impact

Supersonic air flow due to solid-liquid impact
Supersonic air flow due to solid-liquid impact
A solid object impacting on liquid creates a liquid jet due to the collapse of the impact cavity. Using visualization experiments with smoke particles and multiscale simulations, we show that in addition, a high-speed air jet is pushed out of the cavity. Despite an impact velocity of only 1??m/s, this air jet attains supersonic speeds already when the cavity is slightly larger than 1 mm in diameter. The structure of the air flow closely resembles that of compressible flow through a nozzle—with the key difference that here the “nozzle” is a liquid cavity shrinking rapidly in time.
1-4
Gekle, Stephan
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Peters, Ivo
222d846e-e620-4017-84cb-099b14ff2d75
Gordillo, Jose Manuel
f710c69e-f939-4d18-9f55-48e882acace7
van der Meer, Devaraj
54e00557-0050-43f5-9efb-a28ea962591c
Lohse, Detlef
a4e72495-4a7c-4f36-b482-6066cb11797a
Gekle, Stephan
828bf58e-4a60-4d0c-a26e-0200b2a4d577
Peters, Ivo
222d846e-e620-4017-84cb-099b14ff2d75
Gordillo, Jose Manuel
f710c69e-f939-4d18-9f55-48e882acace7
van der Meer, Devaraj
54e00557-0050-43f5-9efb-a28ea962591c
Lohse, Detlef
a4e72495-4a7c-4f36-b482-6066cb11797a

Gekle, Stephan, Peters, Ivo, Gordillo, Jose Manuel, van der Meer, Devaraj and Lohse, Detlef (2010) Supersonic air flow due to solid-liquid impact. Physical Review Letters, 104 (24501), 1-4. (doi:10.1103/physrevlett.104.024501).

Record type: Article

Abstract

A solid object impacting on liquid creates a liquid jet due to the collapse of the impact cavity. Using visualization experiments with smoke particles and multiscale simulations, we show that in addition, a high-speed air jet is pushed out of the cavity. Despite an impact velocity of only 1??m/s, this air jet attains supersonic speeds already when the cavity is slightly larger than 1 mm in diameter. The structure of the air flow closely resembles that of compressible flow through a nozzle—with the key difference that here the “nozzle” is a liquid cavity shrinking rapidly in time.

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Supersonic Air Flow due to Solid-Liquid Impact.pdf - Accepted Manuscript
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More information

Published date: 11 January 2010
Organisations: Aerodynamics & Flight Mechanics Group

Identifiers

Local EPrints ID: 399964
URI: http://eprints.soton.ac.uk/id/eprint/399964
PURE UUID: 3223343c-dbd4-46f7-8d28-3754e81d7819
ORCID for Ivo Peters: ORCID iD orcid.org/0000-0002-3549-3322

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Date deposited: 08 Sep 2016 15:47
Last modified: 15 Mar 2024 03:52

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Contributors

Author: Stephan Gekle
Author: Ivo Peters ORCID iD
Author: Jose Manuel Gordillo
Author: Devaraj van der Meer
Author: Detlef Lohse

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