Void fraction measurements in breaking waves
Void fraction measurements in breaking waves
This paper describes detailed measurements and analysis of the time-varying distribution of void fractions in three different breaking waves under laboratory conditions. The measurements were made with highly sensitive optical fibre phase detection probes and document the rapid spatial and temporal evolutions of both the bubble plume generated beneath the free surface and the splashes above. Integral properties of the measured void fraction fields reveal a remarkable degree of similarity between characteristics of the two-phase flow in different breaker types as they evolve with time. Depending on the breaker type, the energy expended in entraining air and generating splash accounts for a minimum of between 6.5 and 14% of the total energy dissipated during wave breaking.
breaking waves, air entrainment, bubble plumes, splash, void fraction, energy dissipation
3151-3170
Blenkinsopp, C.E.
667e2a73-0488-4e5d-9eda-d58526fbc8c6
Chaplin, J.R.
d5ed2ba9-df16-4a19-ab9d-32da7883309f
8 December 2007
Blenkinsopp, C.E.
667e2a73-0488-4e5d-9eda-d58526fbc8c6
Chaplin, J.R.
d5ed2ba9-df16-4a19-ab9d-32da7883309f
Blenkinsopp, C.E. and Chaplin, J.R.
(2007)
Void fraction measurements in breaking waves.
Proceedings of the Royal Society A, 463 (2088), .
(doi:10.1098/rspa.2007.1901).
Abstract
This paper describes detailed measurements and analysis of the time-varying distribution of void fractions in three different breaking waves under laboratory conditions. The measurements were made with highly sensitive optical fibre phase detection probes and document the rapid spatial and temporal evolutions of both the bubble plume generated beneath the free surface and the splashes above. Integral properties of the measured void fraction fields reveal a remarkable degree of similarity between characteristics of the two-phase flow in different breaker types as they evolve with time. Depending on the breaker type, the energy expended in entraining air and generating splash accounts for a minimum of between 6.5 and 14% of the total energy dissipated during wave breaking.
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Submitted date: 15 March 2007
Published date: 8 December 2007
Keywords:
breaking waves, air entrainment, bubble plumes, splash, void fraction, energy dissipation
Identifiers
Local EPrints ID: 49078
URI: http://eprints.soton.ac.uk/id/eprint/49078
ISSN: 1364-5021
PURE UUID: 203b84cb-c6b2-4e70-b800-e9f29bdec713
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Date deposited: 23 Oct 2007
Last modified: 16 Mar 2024 03:13
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Author:
C.E. Blenkinsopp
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