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Research
Soheil Gholamreza-Kashi

: :  Experimental Study of Rectangular Surface Jets  : :
Surface jets are seen in many engineering applications, for example, the discharge of heated water from power plants or wastewater from treatment plants into rivers, lakes, and oceans. Mixing and transport of scalars, such as heat, oxygen, and chemical species are governed by the jet turbulence characteristics. This research aims to document the macroscopic structure of rectangular surface jets. To this end, different experimental methods are used. The flow has been visualized using Laser Induced Fluorescence visualization to establish a framework for quantitative measurements. The results show that beneath the surface, the jet spreads symmetrically, similar to a free jet. At a thin surface layer however, the jet spreads laterally much faster than the flow beneath. Formation of this diverging thin surface layer seems to be a result of dynamic interaction of vortices with the free surface. Mean flow field and turbulent quantities are being mapped using Laser Doppler Velocimetry. The temporal evolution will be obtained using Particle Imaging Velocimetry, from which vortex structures will be extracted using pattern recognition techniques. The effects of buoyancy and surface tension will be investigated. The results will be compared to numerical models.

View my research poster(s):
Coherent structures in rectangular surface jets
 Experimental study of rectangular surface jets



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