Shock-induced collapse of a cylindrical air cavity in water: a Free-Lagrange simulation
Shock-induced collapse of a cylindrical air cavity in water: a Free-Lagrange simulation
A Free-Lagrange CFD code is used to simulate the collapse of a cylindrical air cavity in water by a 1.9 GPa incident shock. The Lagrangian treatment allows the air/water interface to be tracked throughout the interaction. The incident shock is partially transmitted into the cavity, within which it experiences multiple reflections.
The upstream cavity wall involutes to form a high-speed jet which, on impact with the far cavity wall, produces an intense blast wave. Heating of the gas within the cavity is highly non-isentropic, and is dominated by shock heating. The predicted final gas temperature is of order 12000 K, although the modelling assumptions used here lead to over-prediction of temperature during the later stages of collapse.
free-lagrange method, bubble collapse, detonation initiation, cavitation, jetting, shock heating
265-276
Ball, G.J.
2eb541a1-2a56-44c4-8ab1-4ff035fe87b7
Howell, B.P.
c0e12cd9-1e81-43f0-9b65-b1e3e2fb3369
Leighton, T.G.
3e5262ce-1d7d-42eb-b013-fcc5c286bbae
Schofield, M.J.
f9efd378-df80-4687-b8f6-8155fb65b87e
2000
Ball, G.J.
2eb541a1-2a56-44c4-8ab1-4ff035fe87b7
Howell, B.P.
c0e12cd9-1e81-43f0-9b65-b1e3e2fb3369
Leighton, T.G.
3e5262ce-1d7d-42eb-b013-fcc5c286bbae
Schofield, M.J.
f9efd378-df80-4687-b8f6-8155fb65b87e
Ball, G.J., Howell, B.P., Leighton, T.G. and Schofield, M.J.
(2000)
Shock-induced collapse of a cylindrical air cavity in water: a Free-Lagrange simulation.
Shock Waves, 10 (4), .
(doi:10.1007/s001930000060).
Abstract
A Free-Lagrange CFD code is used to simulate the collapse of a cylindrical air cavity in water by a 1.9 GPa incident shock. The Lagrangian treatment allows the air/water interface to be tracked throughout the interaction. The incident shock is partially transmitted into the cavity, within which it experiences multiple reflections.
The upstream cavity wall involutes to form a high-speed jet which, on impact with the far cavity wall, produces an intense blast wave. Heating of the gas within the cavity is highly non-isentropic, and is dominated by shock heating. The predicted final gas temperature is of order 12000 K, although the modelling assumptions used here lead to over-prediction of temperature during the later stages of collapse.
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Published date: 2000
Keywords:
free-lagrange method, bubble collapse, detonation initiation, cavitation, jetting, shock heating
Identifiers
Local EPrints ID: 21322
URI: http://eprints.soton.ac.uk/id/eprint/21322
ISSN: 1432-2153
PURE UUID: 46eeda0d-e076-4d30-b0bf-bec414428916
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Date deposited: 19 Jul 2006
Last modified: 16 Mar 2024 02:44
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Contributors
Author:
G.J. Ball
Author:
B.P. Howell
Author:
M.J. Schofield
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