DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kang, Youn J. | ko |
dc.contributor.author | Cho, Yeunwoo | ko |
dc.date.accessioned | 2019-04-18T02:10:10Z | - |
dc.date.available | 2019-04-18T02:10:10Z | - |
dc.date.created | 2019-04-16 | - |
dc.date.created | 2019-04-16 | - |
dc.date.issued | 2019-05 | - |
dc.identifier.citation | JOURNAL OF FLUID MECHANICS, v.866, pp.841 - 864 | - |
dc.identifier.issn | 0022-1120 | - |
dc.identifier.uri | http://hdl.handle.net/10203/261020 | - |
dc.description.abstract | Jet-like surface waves generated by an electric-spark-generated underwater bubble are experimentally studied. Three different motions of jet-like surface waves are observed depending on the inception position of the bubble ( d : 0.28-7 mm) below the free surface and the maximum radius of the bubble ( R-m : 1.5-3.6 mm). When d/R-m>1.3 , the surface wave shows a simple smooth hump (case 1). When 0.82 , a single droplet or multiple droplets are pinched off sequentially or simultaneously at the tip or from some points of the jet-like surface wave (case 2). Finally, when d/R-m , a series of squirting and jetting phenomena are observed at the top of the jet-like surface wave (case 3). For case 1, a proportional relationship is found between rho gh/Delta p and (d/R-m)(-4.4) , where Delta p is the density of the fluid, rho is the gravitational acceleration and Delta p is the difference between the reference atmospheric pressure and the vapour pressure inside a bubble. This proportional relationship is explained semi-analytically using a scaling argument and conservation of momentum and energy, with the help of the Kelvin impulse theory. In addition, we solve the relevant axisymmetric Cauchy-Poisson problem where the initial condition is a jet-like surface wave near its maximum height. By comparing the analytical wave solution with the observed surface wave pattern, it is found that the resultant surface waves are indeed gravity-capillary waves where both the gravity and the surface tension are equally important. | - |
dc.language | English | - |
dc.publisher | CAMBRIDGE UNIV PRESS | - |
dc.title | Gravity-capillary jet-like surface waves generated by an underwater bubble | - |
dc.type | Article | - |
dc.identifier.wosid | 000462632600007 | - |
dc.identifier.scopusid | 2-s2.0-85063145695 | - |
dc.type.rims | ART | - |
dc.citation.volume | 866 | - |
dc.citation.beginningpage | 841 | - |
dc.citation.endingpage | 864 | - |
dc.citation.publicationname | JOURNAL OF FLUID MECHANICS | - |
dc.identifier.doi | 10.1017/jfm.2019.135 | - |
dc.contributor.localauthor | Cho, Yeunwoo | - |
dc.description.isOpenAccess | N | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | waves | - |
dc.subject.keywordAuthor | free-surface flows | - |
dc.subject.keywordPlus | COLLAPSING BUBBLE | - |
dc.subject.keywordPlus | CAVITATION BUBBLES | - |
dc.subject.keywordPlus | VAPOR CAVITY | - |
dc.subject.keywordPlus | DYNAMICS | - |
dc.subject.keywordPlus | LASER | - |
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