Title of article
Features of flow past a circular cylinder with a slit
Author/Authors
sheng, w. jian ministry of education of the people s republic of china (moe) - school of mechanical engineering, tianjin university - key laboratory of e cient utilization of low and medium grade energy, China , chen, w. tianjin university - school of mechanical engineering - department of mechanics, China
From page
2097
To page
2112
Abstract
The impact of a slit placed along a circular cylinder diameter, which is parallel to the incoming flow, is numerically investigated in order to find a geometric modification that can help drag reduction, as well as vortex suppression, without any additional energy consumption. The drag reduction is achieved by diverting part of the fluid in the front stagnation region into the low pressure zone at the back of cylinder through the slit. The Reynolds number based on the cylinder diameter, D, ranges from 60 to 250. The effect of the slit width ratio (s/D) on the drag and lift coefficients, the Strouhal number, and the wake flow feature of the cylinder is presented. Favorable reduction of drag and lift coefficients is observed with the rising of slit width ratio. The vortex shedding generated from the slit alters the wake flow thoroughly and drives the vortex shedding derived from the cylinder surface to further downstream.
Keywords
Passive control , Cylinder with a slit , Vortex suppression , Drag and lift coefficients , Strouhal number
Journal title
Scientia Iranica(Transactions B:Mechanical Engineering)
Journal title
Scientia Iranica(Transactions B:Mechanical Engineering)
Record number
2720389
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