Author: Rajesh Bhaskaran & Yong Sheng Khoo, Cornell University Problem Specification |
Lift convergence plot can be used to compute the correct value of Strouhal number. Non-dimensionalize the problem and Sr = f*D/U = 0.0846 * 2 = 0.169. The results matches fairly well with the value 0.183 as reported by Williamson
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Main Menu > Display > Contours
Under Contours of, choose Pressure.. and Pressure Coefficient. Select the Filled option. Increase the number of contour levels plotted. Set Levels to 100
. Disable Auto Range and Clip to Range from the Options group box. Enter -1.225
and 0.5
for Min and Max, respectively.Click Display.
https://confluence.cornell.edu/download/attachments/107011458/pressure%20contour%20coefficient%20plot.jpg |
The contour shows a clear asymmetric pattern in the flow. The local pressure minima (the green patch downstream) are the center of the vortices.
Main Menu > Display > Contours
Under Contours of, choose Velocity.. and Vorticity Magnitude. Disable Auto Range and Clip to Range from the Options group box. Enter 0.0001
and 2
for Min and Max, respectively. Select Levels to 50. Click Display.
https://confluence.cornell.edu/download/attachments/107011458/velocity%20magnitude%20contour%20plot.jpg |
This figure shows clear vortex shedding process. Zoom in the view around cylinder.
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