Effects of short splitter plates on vortex shedding and sound generation in flow past two side-by-side square cylinders

2016 ◽  
Vol 57 (9) ◽  
Author(s):  
Ressa Octavianty ◽  
Masahito Asai
Keyword(s):  
Vortex Shedding ◽  
Sound Generation ◽  
Splitter Plates ◽  
Square Cylinders ◽  
Flow Past

scholarly journals Visualization of flow past square cylinders with corner modification

2020 ◽  
Vol 4 (3) ◽  
pp. 285-294
Author(s):  
Ch. Krishnappa Vikram ◽  
H. V. Ravindra ◽  
Y. T. Krishnegowda
Keyword(s):  
Aluminum Powder ◽  
Experimental Work ◽  
Vortex Shedding ◽  
Test Section ◽  
Square Cylinder ◽  
Square Cylinders ◽  
Flow Past ◽  
Spacing Ratio ◽  
Vortex Shedding Frequency ◽  
Shedding Frequency

This article presents the results for flow past a square cylinder and two square cylinders of the same and different sizes with corner modifications by varying the spacing ratio. Here, experimental work is conducted in a recirculatory channel filled with water. A set of aluminum discs made to rotate to create the flow in the test section. The motor is used to vary the speed of the water. Fine aluminum powder is used as a tracer medium. It is observed that vortex shedding frequency decreases by placing the second cylinder in the downstream of the first cylinder. For similar size cylinders, the width of the eddy in the middle of the cylinders increases with an increase in spacing ratio. With the increase of spacing ratio to 6, the flow past each cylinder behaves like a single square cylinder. If the upstream square cylinder size is smaller than the downstream square cylinder, the eddy size is reduced in between the cylinder compared to the downstream of the second cylinder. If the upstream square cylinder size is bigger than the downstream square cylinder, the eddy size is larger in between the cylinder compared to the downstream of the second cylinder.

The effects of wake splitter plates on the flow past a circular cylinder in the range 104

1973 ◽  
Vol 61 (1) ◽  
pp. 187-198 ◽  
Author(s):  
C. J. Apelt ◽  
G. S. West ◽  
Albin A. Szewczyk
Keyword(s):  
Circular Cylinder ◽  
Strouhal Number ◽  
Vortex Shedding ◽  
Measurement Techniques ◽  
Base Pressure ◽  
Visualization Technique ◽  
Pressure Distributions ◽  
Splitter Plates ◽  
Flow Past ◽  
Careful Measurement

Experiments were carried out using models having L/D [les ] 2 and the resulting pressure distributions and vortex shedding characteristics are presented. A simple visualization technique which provides explanations of some of the measured results is described. It is concluded that splitter planes reduce the drag markedly by stabilizing the separation points and produce a wake narrower than that for a plain cylinder, raise the base pressure by as much as 50% and affect the Strouhal number to a lesser degree. Careful measurement techniques have enabled these effects to be presented accurately.

Flow past two square cylinders with flexible splitter plates

2014 ◽  
Vol 55 (6) ◽  
pp. 1155-1166 ◽  
Author(s):  
Mohd Furquan ◽  
Sanjay Mittal
Keyword(s):  
Splitter Plates ◽  
Square Cylinders ◽  
Flow Past

Effects of Corner Cutoffs on Flow Past Two Square Cylinders in a Tandem Arrangement

2012 ◽  
Author(s):  
Y. T. Krishne Gowda ◽  
H. V. Ravindra ◽  
C. K. Vikram
Keyword(s):  
Reynolds Number ◽  
Pressure Distribution ◽  
Strouhal Number ◽  
Vortex Shedding ◽  
Lift Coefficient ◽  
Two Dimensional ◽  
Square Cylinder ◽  
Tandem Arrangement ◽  
Square Cylinders ◽  
Flow Past

Flow past the two square cylinders with and without corner modification in a tandem arrangement has been simulated using a CFD code FLUENT. A Reynolds number of 100 and pitch to perimeter ratios (PPR) of 2,4 and 6 are considered for the investigation. The flow is assumed to be two dimensional unsteady and incompressible. The obtained results are presented in the form of streamlines, pressure distribution, monitored velocity, lift coefficient and Strouhal number. Results indicate, in case of chamfered and rounded corners, there is decrease in the wake width and thereby the lift values. For the square cylinders of same perimeters with and without corner modification, the size of the eddy and the monitored velocity in between the square cylinders increases with increase in PPR. Frequency of vortex shedding is same in between the cylinders and in the downstream of the cylinder. Frequency of vortex shedding decreases with the introduction of second cylinder either in the upstream or downstream of the first cylinder. The lift coefficient of square cylinder with corner modification decreases but Strouhal number increases when compared with a square cylinder without corner modification.

COMPARISON OF LES WITH DSM, k-ε AND EXPERIMENTS FORTURBULENT VORTEX SHEDDING FLOW PAST 2D SQUARE CYLINDER

1994 ◽  
Vol 59 (459) ◽  
pp. 49-56 ◽  
Author(s):  
Shigehiro SAKAMOTO ◽  
Akashi MOCHIDA ◽  
Shuzo MURAKAMI ◽  
Wolfgang RODI
Keyword(s):  
Vortex Shedding ◽  
Square Cylinder ◽  
Flow Past
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