000137260 001__ 137260
000137260 005__ 20190117191532.0
000137260 0247_ $$2doi$$a10.1007/s00348-008-0594-1
000137260 02470 $$2ISI$$a000265081300010
000137260 037__ $$aARTICLE
000137260 245__ $$aVelocity profiles and interface instability in a two-phase fluid: investigations using ultrasonic velocity profiler
000137260 269__ $$a2009
000137260 260__ $$c2009
000137260 336__ $$aJournal Articles
000137260 500__ $$a[647]
000137260 520__ $$aIn the present study the velocity profiles and the instability at the interface of a two phase water-oil fluid were investigated. The main aim of the research project was to investigate the instability mechanisms that can cause the failure of an oil spill barrier. Such mechanisms have been studied before for a vast variety of conditions. Although the velocity field in the region behind the barrier can influence the failure significantly, it had not been measured and analyzed precisely. In the present study the velocity profiles in the vicinity of different barriers were studied. To undertake the experiments, an oil layer was contained over the surface of flowing water by means of a barrier in a laboratory flume. The ultrasonic velocity profiler method was used to measure velocity profiles in each phase and to detect the oil–water interface. The effect of the barrier geometry on velocity profiles was studied. It was determined that the contained oil slick, although similar to a gravity current, can not be considered as a gravity current. The oil–water interface, derived from ultrasonic echo, was used to find the velocity profile in each fluid. Finally it was shown that the fluctuations at the rearward side of the oil slick head are due to Kelvin–Helmholtz instabilities.
000137260 6531_ $$avelocity profiles
000137260 6531_ $$atwo phase flow
000137260 6531_ $$awater-oil
000137260 6531_ $$aoil spill barrier
000137260 700__ $$0249664$$aAmini, Azin$$g159338
000137260 700__ $$0240404$$aDe Cesare, Giovanni$$g101010
000137260 700__ $$0241228$$aSchleiss, Anton$$g112841
000137260 773__ $$j46$$k4$$q683-692$$tEXPERIMENTS IN FLUIDS
000137260 909C0 $$0252079$$pLCH$$xU10263
000137260 909C0 $$0255473$$pPL-LCH$$xU10263
000137260 909CO $$ooai:infoscience.tind.io:137260$$particle$$pENAC
000137260 937__ $$aLCH-ARTICLE-2009-009
000137260 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000137260 980__ $$aARTICLE