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Drag Coefficient Verification around Cylinder |
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August 23, 2011, 00:18 |
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#41 |
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Joshua Counsil
Join Date: Jul 2009
Location: Halifax, Nova Scotia, Canada
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Please give more of the setup details, e.g., Reynolds number, turbulence model (if any), etc.
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August 23, 2011, 00:18 |
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#42 |
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ST
Join Date: Sep 2010
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Hi Glenn,
Yes, I am checking it now with 1000 time-steps/cycle. I have previously used 100 and 200 time-steps/cycle. My model is 2d with an added one-element thickness in z-direction. Axially, it covers a distance of 3c (from inlet to object) to 8c (from object to outlet). Laterally, 7c to upper and lower boundary. The total element now is around 200,000. I will increase it further. Cheers, bbhv |
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August 23, 2011, 02:55 |
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#43 |
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Joshua Counsil
Join Date: Jul 2009
Location: Halifax, Nova Scotia, Canada
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Sounds like your domain might be too small. 3c from the inlet is pretty small, especially considering the high-pressure front surface that blunt object causes.
Try increasing your domain in every direction and creating a coarse mesh in the extended regions so that the simulation is not significantly longer. |
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May 11, 2015, 10:49 |
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#44 | |
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Emre G
Join Date: May 2011
Location: Turkey
Posts: 126
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Quote:
I have the same problem. I get Cd=0.5 but exp value is 1.2 for 2D cylinder. What should i do? thanks |
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May 11, 2015, 19:27 |
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#45 |
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Glenn Horrocks
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