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Abstract

Characterieation of instability mode inside an open cavity for different shape ratio

Author(s): Hallek Khouloud, Mourad Bouterra, Afif El Cafsi, Ali Belghith, Francois Lusseyran, Pierre Gougat

A number of studies have referred to the existence of a vortex cellwithin an urban street canyon. The understanding of vortex dynamics or vorticity distribution is a such configuration is of great interest. This configuration was simulated by the interaction between a boundary layer and a cavity. Experimental characterization of the vortex structures evolutionwas developed by the technique ofmeasure Particle ImageVelocimetry (PIV). In this paper, we have studied and characterized experimentally by the technique of measure Laser Doppler Velocimetry (LDV) the vortex escape frequencies. Measurementswere performed for different cavity shape ratio and for different mean velocities. Where the ratio between the shear instability process and the mechanisms of frequency selection which depend of the size of the cavity.


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Citations : 543

Environmental Science: An Indian Journal received 543 citations as per Google Scholar report

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