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

Turbulent Boundary Conditions

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   June 16, 2011, 03:05
Default Turbulent Boundary Conditions
  #1
Senior Member
 
Join Date: Mar 2011
Location: Germany
Posts: 552
Rep Power: 20
cfd seeker is on a distinguished road
hi all, i am new user of fluent and these i am doing a project to calculate CL,CD,CM over a general stepped(diameter is differnet at differnet locations) missile body at 2 degree AOA and M=2. Here i want to ask what is the correct method of specifying turbulent boundary conditions. I know there are 4 methods to specify them. What is the best method for my case??? how much they affect the accuracy of our results??? i went through the fluent manual and only came to know the method to specify Turbulent length scale i.e l=0.4*$($ is Bounday layer thickness) and Turbulent viscosity ration b/w 1-10. What is the best value for my case?? 1 or 10??? in what cases low values of turbulent viscosity ratio are better or when high values are better??? what is the method or formula to specify k and epsilon??? what is the method or formula to specify turbulence intensity???
Thanx in advance
cfd seeker is offline   Reply With Quote

Old   June 20, 2011, 14:45
Default
  #2
Senior Member
 
Join Date: Mar 2011
Location: Germany
Posts: 552
Rep Power: 20
cfd seeker is on a distinguished road
somebody please take out some time and clarify my questions, i shall b very thankful to that person
cfd seeker is offline   Reply With Quote

Old   June 24, 2011, 03:28
Default
  #3
Senior Member
 
Join Date: Mar 2011
Location: Germany
Posts: 552
Rep Power: 20
cfd seeker is on a distinguished road
no replies yet, i am stilling waiting
cfd seeker is offline   Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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
Wind turbine simulation Saturn CFX 58 July 3, 2020 02:13
mass flow in is not equal to mass flow out saii CFX 12 March 19, 2018 06:21
Impinging Jet Boundary Conditions Anindya Main CFD Forum 25 February 27, 2016 13:58
[Netgen] boundary conditions and mesh exporting vaina74 OpenFOAM Meshing & Mesh Conversion 2 May 27, 2010 10:38
Help with boundary conditions Dan CFX 0 April 3, 2006 12:32


All times are GMT -4. The time now is 21:30.