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Determine the exact location of the vertex center?

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Old   April 3, 2006, 17:02
Default Determine the exact location of the vertex center?
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Hello, everyone,

I am asking a question about data postprocessing. I get the results for the flow past a cyliner. But I don't know how to exactly locate the center of the vortex behind the cylinder and how to exactly get the separation angle.

You help is most appreciated!

Thanks a lots!!!
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Old   April 4, 2006, 02:36
Default Re: Determine the exact location of the vertex cen
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Dear Anna,

I am not sure if the 'exact' location of votex center and the separation angle can be determined. However, from viewpoint of data processing, a reasonably good ide of these can be obtained. These can be obtained by plotting the streamlines for the flow.

Hope this helps.



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Old   April 4, 2006, 04:08
Default Re: Determine the exact location of the vertex cen
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Hi !!

You can find the center of vortex from the stream-function data and recirculation (or wake) length from the velocity data.

Separation angle: Separation angle can be determined by calculating the vorticity (or shear-stress) on the surface of the cylinder. The point at which the value is zero can be noted as the point of separation (or separation angle).

Best regards.... Ramp
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Old   April 4, 2006, 11:04
Default Thank you! Ganesh and Ramp
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Lots of thanks for your help. I will try to figure it out.

You are very helpful!!

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