Fluid flow and fluid free surface interaction using particle image velocimetry
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Particle Image Velocimetry is a very efficient tool for studying fluid flow and fluid free surface movement interaction. The technique allows simultaneous measurements of the free surface position and of the flow velocity field. Each image data records four consecutive laser pulses and contains particle tracks that present a pattern easily identifiable. The images are acquired by a digital camera. The digital format allows direct processing for the extraction of the free surface position and the particles' centroid positions. The patterns presented by the moving particles are identified by a code based on an artificial neural network algorithm. The velocity information is processed with the free surface information and provides statistical information on the free surface movement and the turbulence in the flow in Lagrangian coordinates. The results are in the form of plots that indicate average velocity, the turbulent kinetic energy in both directions as well as the Reynolds stress for different free surface movement conditions.
author list (cited authors)
Philip, O. G., Hassan, Y. A., & Okamoto, K.