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June 2, 2009, 04:16 |
Reynolds contour plotting in cfx-post
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#1 |
Member
SMN
Join Date: Jun 2009
Location: CANADA
Posts: 71
Rep Power: 17 |
hi:
i want to plot a contour plot for reynolds number in default domain in cfx-post...how can i do it??? best regards |
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June 2, 2009, 20:02 |
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#2 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,844
Rep Power: 144 |
Hi,
Define a function for Reynolds number, then it will appear as a variable you can do contours with. Have a look in the tutorials for how to do this. Glenn Horrocks |
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June 3, 2009, 01:49 |
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#3 |
Member
SMN
Join Date: Jun 2009
Location: CANADA
Posts: 71
Rep Power: 17 |
hi Glenn Horrocks and thank you very much for all your helps:
the geometry is very complicated and i cant define any effective length in reynolds num.also the direction changes and i cant use parameters like y or z as diameter in CEL. the tutorial is very simple and i cant use it. |
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June 3, 2009, 08:34 |
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#4 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,844
Rep Power: 144 |
Hi,
Well if you can't define a length scale then how can you work out a Reynolds Number? I am guessing you are looking for the surface Re number to look for turbulence transition or turbulent boundary layer growth along a surface. This would be tricky to visualise on an arbitrary geometry. If you are using the turbulence transition model I think one of the variables modelled is in effect the surface Re number, that might help. Otherwise you might be able to define a length scale using surface streamlines where you use the position along the streamline as your length scale. Just an idea, it would be tricky to get working. Glenn Horrocks |
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