Air entrainment by an inclined jet

Claus-Dieter Ohl, Hasan N. Og̃uz, Andrea Prosperetti

Research output: Contribution to conferenceAbstractAcademic


A smooth inclined jet impinging on an otherwise undisturbed liquid surface does not entrain air even at Reynolds numbers as large as 10,000 or more. Air entrainment requires that the jet surface be subject to sufficiently large disturbances. In order to study the phenomenon experimentally an isolated disturbance is generated on a smooth inclined jet by rapidly increasing the flow rate. The bulge that forms in this way is convected by the jet and impacts the liquid surface forming a cavity. When this cavity closes, air is entrained and splashing is observed. An overview of the different dynamic phenomena leading to these processes is presented. Quantitative data on the dependence of the entrained air volume on the jet flow rate and inclination angle are given.
Original languageEnglish
Number of pages1
Publication statusPublished - 1999
Externally publishedYes
Event52nd Annual Meeting of the APS Division of Fluid Dynamics, APS-DFD 1999 - New Orleans, United States
Duration: 21 Nov 199923 Nov 1999
Conference number: 52


Conference52nd Annual Meeting of the APS Division of Fluid Dynamics, APS-DFD 1999
Abbreviated titleAPS-DFD
Country/TerritoryUnited States
CityNew Orleans


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