- Osmaniye Korkut Ata Üniversitesi Fen Bilimleri Enstitüsü Dergisi
- Vol: 6 Issue: 2
- Large Eddy Simulation of the Biased Wake Flow Downstream of Circular Cylinders with a Slit
Large Eddy Simulation of the Biased Wake Flow Downstream of Circular Cylinders with a Slit
Authors : Tural Tunay
Pages : 1481-1499
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Publication Date : 2023-07-05
Article Type : Research Article
Abstract :The characteristics of flow around slit-inserted cylinders are investigated using the three-dimensional large eddy simulation (LES). In the investigations, three different slit width-to-cylinder diameter ratios, i.e., s/D=0.1, 0.2 and 0.3, together with regular cylinder are used. Slits are placed inside the cylinders with a zero-inclination angle, = 0o. The Reynolds number of the flow is ReD=3900 based on the cylinder diameter, D, and free stream velocity, U∞. The results present that the jet flow emerging from the slits deviates in crossflow direction forming a biased wake flow downstream of the slit cylinders. Compared with the regular cylinder, relative per cent reductions in drag coefficients of the slit cylinders with s/D = 0.1, 0.2 and 0.3 are 3.1%, 11.3% and 6.5%, respectively. The rates of turbulence quantities in downstream wakes of the slit cylinders are reduced. Formations of shear layers in the downstream wake change drastically as the slit width-to-diameter ratio, s/D, increase.Keywords : Silindir, BGS (Büyük Girdap Simülasyonu), Pasif akış kontrolü, Yarık