CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > CFX

3D velocity fluctuation profiles from a file in initialization section using LES.

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   July 8, 2015, 16:24
Default 3D velocity fluctuation profiles from a file in initialization section using LES.
  #1
New Member
 
Luis Aramis
Join Date: Jul 2015
Posts: 1
Rep Power: 0
Aramisss is on a distinguished road
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!!
Aramisss is offline   Reply With Quote

Reply

Tags
initial conditions, profile files, velocity fluctuations


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
how to calculate mass flow rate on patches and summation of that during the run? immortality OpenFOAM Post-Processing 104 February 16, 2021 08:46
SparceImage v1.7.x Issue on MAC OS X rcarmi OpenFOAM Installation 4 August 14, 2014 06:42
Trouble compiling utilities using source-built OpenFOAM Artur OpenFOAM Programming & Development 14 October 29, 2013 10:59
DxFoam reader update hjasak OpenFOAM Post-Processing 69 April 24, 2008 01:24
[blockMesh] Axisymmetrical mesh Rasmus Gjesing (Gjesing) OpenFOAM Meshing & Mesh Conversion 10 April 2, 2007 14:00


All times are GMT -4. The time now is 00:20.