Near-wall velocity measurements by particle-shadow tracking

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<p>We report a new method to measure the velocity of a fluid in the vicinity of a wall. The method, that we call particle-shadow tracking (PST), simply consists in seeding the fluid with a small number of fine tracer particles of density close to that of the fluid. The position of each particle and of its shadow on the wall are then tracked simultaneously, allowing one to accurately determine the distance separating tracers from the wall and therefore to extract the velocity field. We present an application of the method to the determination of the velocity profile inside a laminar density current flowing along an inclined plane.</p>

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Exp. FluidsISI Document Delivery No.: 178RXTimes Cited: 0Cited Reference Count: 8Cited References:ADRIAN RJ, 1991, ANNU REV FLUID MECH, V23, P261ALFREDSSON PH, 1988, PHYS FLUIDS, V31, P1026BUSCHMANN MH, 2003, AIAA J, V41, P565LAMB SH, 1945, HYDRODYNAMICS, P599LANCIEN P, 2005, 4 IAHR S RIV COAST E, P527LANCIEN P, 2005, PHYS MAGAZINE, V27, P377SOMANDEPALLI VSR, 2004, 12 INT S APPL LAS TETOWNSEND AA, 1976, STRUCTURE TURBULENT