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.
|Number of pages||1|
|Publication status||Published - 1999|
|Event||52nd Annual Meeting of the APS Division of Fluid Dynamics, APS-DFD 1999 - New Orleans, United States|
Duration: 21 Nov 1999 → 23 Nov 1999
Conference number: 52
|Conference||52nd Annual Meeting of the APS Division of Fluid Dynamics, APS-DFD 1999|
|Period||21/11/99 → 23/11/99|