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Posted:
1 decade ago
15 avr. 2010, 10:16 UTC−4
What is the Reynolds number (with respect to the diameter of the cylinder) you are trying to achieve?
If it is higher than 1000-2000 you will need special treatments with nearly everything in Comsol.
What is the Reynolds number (with respect to the diameter of the cylinder) you are trying to achieve?
If it is higher than 1000-2000 you will need special treatments with nearly everything in Comsol.
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Posted:
1 decade ago
15 avr. 2010, 10:51 UTC−4
Hi Danial
Thank you for replying to my problem.
My dimensions are diamter of cylinder 0.168m with 5 m/s velocity ,density of air 1.23 and viscosity of 1.85e-5.
So when i calulate it Reynolds number its realy very high, arounf 56,000. Does that mean I cannot solve this problem?
Thanks for helping.
Best Regards
Thomas
Hi Danial
Thank you for replying to my problem.
My dimensions are diamter of cylinder 0.168m with 5 m/s velocity ,density of air 1.23 and viscosity of 1.85e-5.
So when i calulate it Reynolds number its realy very high, arounf 56,000. Does that mean I cannot solve this problem?
Thanks for helping.
Best Regards
Thomas
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Posted:
1 decade ago
15 avr. 2010, 11:22 UTC−4
I do not have an answer to whether it is possible or not.
You should take care of turbulence, either using Turbulent models inside the Comsol, i.e. k-e model if you want to just simulate the general flow behaviour. Otherwise if you want to resolve the eddies and vortices behind the cylinder, I am not sure if you can do it with the methods available in Comsol. In that case I can imagine you go with methods like LES to resolve the eddies at high Re's.
I do not have an answer to whether it is possible or not.
You should take care of turbulence, either using Turbulent models inside the Comsol, i.e. k-e model if you want to just simulate the general flow behaviour. Otherwise if you want to resolve the eddies and vortices behind the cylinder, I am not sure if you can do it with the methods available in Comsol. In that case I can imagine you go with methods like LES to resolve the eddies at high Re's.
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Posted:
1 decade ago
16 avr. 2010, 07:57 UTC−4
Hey Daniel
Thanks for the tip.It worked!
I just wanted to simulate the flow past a cylinder.Now I got great simulation with turbulences.
Hey Daniel
Thanks for the tip.It worked!
I just wanted to simulate the flow past a cylinder.Now I got great simulation with turbulences.
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Posted:
1 decade ago
16 avr. 2010, 08:14 UTC−4
great to hear it works!
great to hear it works!