CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Running, Solving & CFD

mshaADD A NEW RELATION TO kepsilon MODEL

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   December 30, 2007, 10:31
Default HI I want to use the follow
  #1
Member
 
Mojtaba Shahmohammadian
Join Date: Mar 2009
Posts: 73
Rep Power: 17
msha is on a distinguished road
HI

I want to use the following relation


R_=(2*k_/3)*I + ((k_*(1-Clrr2))/(Clrr1+Glrr/epsilon_-1))*(Plrr/epsilon_ - (2*Glrr/(3*epsilon_))*I)

[where

Plrr = -twoSymm(Rlrr_ & fvc::grad(U_))


Glrr =0.5*tr(Plrr)

and Clrr1,Clrr2 are constants.]


in k-epsilon model insted of bossinesque relation:

{(2.0/3.0)*I*k_ - nut_*2*symm(fvc::grad(U_))}

for reynolds stress tensor.


HOW I CAN DO THIS?

ANY COMMENT IS APPRECIATED DEEPLY.

THANKS IN ADVANCE.

MSHA
msha is offline   Reply With Quote

Old   December 31, 2007, 02:21
Default help pls
  #2
Member
 
Mojtaba Shahmohammadian
Join Date: Mar 2009
Posts: 73
Rep Power: 17
msha is on a distinguished road
help pls
msha is offline   Reply With Quote

Old   January 1, 2008, 14:34
Default I guess you'll have to impleme
  #3
Assistant Moderator
 
Bernhard Gschaider
Join Date: Mar 2009
Posts: 4,225
Rep Power: 51
gschaider will become famous soon enoughgschaider will become famous soon enough
I guess you'll have to implement a new turbulence model. For instance have a look at:
http://openfoamwiki.net/index.php/Sig_Turbomachinery_/_Tutorials#How_to_implemen t_a_new_turbulence_model_.28OF-1.4.1.29
__________________
Note: I don't use "Friend"-feature on this forum out of principle. Ah. And by the way: I'm not on Facebook either. So don't be offended if I don't accept your invitation/friend request
gschaider is offline   Reply With Quote

Old   January 6, 2008, 08:06
Default HI Bernhard Gschaider AND
  #4
Member
 
Mojtaba Shahmohammadian
Join Date: Mar 2009
Posts: 73
Rep Power: 17
msha is on a distinguished road
HI Bernhard Gschaider

AND thank you

but I know much more than that the page you have addressed .my probles is an error you can see in previous my message

THANKS ANY WAY
msha 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
Modify kEpsilon model harly OpenFOAM 5 December 3, 2008 18:43
About kEpsilon turbulence model osimonsimon OpenFOAM Running, Solving & CFD 10 April 24, 2008 03:52
NACA0012 Study kepsilon Model pda OpenFOAM Running, Solving & CFD 1 March 11, 2008 04:12
msha ADD A NEW RELATION TO kepsilon MODEL msha OpenFOAM 0 December 30, 2007 10:30
Adjusting kepsilon model braennstroem OpenFOAM Running, Solving & CFD 2 April 12, 2005 10:52


All times are GMT -4. The time now is 13:52.