DC Field | Value | Language |
---|---|---|
dc.contributor.author | Masnadi, Naeem | ko |
dc.contributor.author | Cho, Yeun Woo | ko |
dc.contributor.author | Duncan, James H | ko |
dc.contributor.author | Akylas, Triantaphyllos | ko |
dc.date.accessioned | 2016-04-20T05:18:34Z | - |
dc.date.available | 2016-04-20T05:18:34Z | - |
dc.date.created | 2015-12-14 | - |
dc.date.issued | 2015-11-23 | - |
dc.identifier.citation | 68th Annual Meeting of the APS Division of Fluid Dynamics | - |
dc.identifier.uri | http://hdl.handle.net/10203/204858 | - |
dc.description.abstract | The non-linear response of a water free surface to a pressure source moving at speeds near the minimum speed of linear gravity-capillary waves (C min ≈23 cm/s) is investigated with experiments and theory. In the experiments, waves are generated by a vertically oriented air-jet that moves at a constant speed over the water surface in a long tank. The 3-D surface shape behind the air-jet is measured using a cinematic refraction-based technique combined with an LIF technique. At towing speeds just below C min , an unsteady pattern is formed where localized depressions periodically appear in pairs and move away from the source along the arms of a downstream V-shaped pattern. This behavior is analogous to the periodic shedding of solitary waves upstream of a source moving at the maximum wave speed in shallow water. The gravity-capillary depressions are rapidly damped by viscosity and their speed-amplitude characteristics closely match those from inviscid calculations of gravity-capillary lumps. The shedding frequency of the lumps in the present experiments increases with both increasing towing speed and air-flow rate. Predictions of this behavior using a model equation that incorporates damping and a quadratic nonlinearity are in good agreement with the experiments. | - |
dc.language | English | - |
dc.publisher | APS (American Physical Society) | - |
dc.title | On the response of a water surface to a surface pressure source moving at trans-critical gravity-capillary wave speeds | - |
dc.type | Conference | - |
dc.type.rims | CONF | - |
dc.citation.publicationname | 68th Annual Meeting of the APS Division of Fluid Dynamics | - |
dc.identifier.conferencecountry | US | - |
dc.identifier.conferencelocation | Hynes Convention Center, Boston, MA | - |
dc.contributor.localauthor | Cho, Yeun Woo | - |
dc.contributor.nonIdAuthor | Masnadi, Naeem | - |
dc.contributor.nonIdAuthor | Duncan, James H | - |
dc.contributor.nonIdAuthor | Akylas, Triantaphyllos | - |
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