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3D velocity fluctuation profiles from a file in initialization section using LES. |
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Luis Aramis
Join Date: Jul 2015
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Hello my friends!
I hasn't a good experience in CFX and I'm trying use a velocity profile fluctuation from a file (u'(z), v'(z), w'(z)) in initialization of LES model like this [Name] Prof1 [Spatial Fields] x,y,z [Data] z[m], Velocity Fluctuation u [m s^-1], Velocity Fluctuation v [m s^-1], Velocity Fluctuation w [m s^-1] 0.000000,0.000000,0.000000,0.000000 0.085000,0.420348,0.298373,0.226034 0.170000,0.367191,0.278330,0.224616 0.255000,0.332176,0.259634,0.219433 0.340000,0.304903,0.242193,0.211109 0.425000,0.281938,0.225924,0.200204 0.510000,0.261682,0.210747,0.187285 0.595000,0.243244,0.196591,0.173002 0.680000,0.226059,0.183385,0.158191 0.765000,0.204133,0.170850,0.144179 0.850000,0.190320,0.159995,0.134018 0.935000,0.176899,0.149498,0.124111 1.020000,0.163688,0.139226,0.114320 1.105000,0.150514,0.129056,0.104506 1.190000,0.137194,0.118868,0.094516 And I settled it in initialization>Velocity Fluctuation section "Prof1.Velocity Fluctuation u(z)". I think I'm using just axial profile in this case. But it doesn't work because In results I can't note there aren't a random fluctuations add to instantaneous velocity field into the total field in initial time. I saw we can use a valour to initialize velocity fluctuation but it is not enough to get good results in my simulations. So, How we can use the 3D Velocity fluctuation profiles above in this case? Thanks!! |
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initial conditions, profile files, velocity fluctuations |
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