CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > General Forums > Main CFD Forum

Initialisation of Reynolds Stress Model (RSM) in elsA software

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   July 24, 2017, 10:40
Exclamation Initialisation of Reynolds Stress Model (RSM) in elsA software
  #1
New Member
 
Hidir ABAY
Join Date: Jul 2017
Posts: 1
Rep Power: 0
HidirAbay is on a distinguished road
Hello everybody

First, excuse me for my poor English I am french so I am limited..

I am trying to solve a nozzle flow with the RSM model and I am blocked with the initialisation.

I have to calculate rho*u*u, rho*u*v, [...] and the other components of Reynolds Stress tensor for the boundary conditions. But I don't know how to calculate them.

The previous model I used was k-eps and the data was different.

I Hope you could help me.

Thanks a lot,

Hidir.
HidirAbay is offline   Reply With Quote

Old   July 25, 2017, 11:28
Default
  #2
Senior Member
 
sbaffini's Avatar
 
Paolo Lampitella
Join Date: Mar 2009
Location: Italy
Posts: 2,192
Blog Entries: 29
Rep Power: 39
sbaffini will become famous soon enoughsbaffini will become famous soon enough
Send a message via Skype™ to sbaffini
Quote:
Originally Posted by HidirAbay View Post
First, excuse me for my poor English I am french so I am limited..
Don't be so hard on yourself

Jokes apart, if what you need is boundary conditions (which are different from initialization) and your inlet can ideally be assimilated to a section of a long pipe, you can try solving the RSM in a periodic pipe with that cross section. You can then use that solution as inlet profile for your actual case.

I used this approach to produce inlet for LES computations (which, in turn, need the Reynolds stresses). However, this is not specifically related to elsA, and you need to verify the feasibility of the approach with it. Also, your inlet might not be assimilated to a section of along pipe, in which case I have no specific answer (i guess your only chance then is to specify k and resort to the isotropy condition).
sbaffini is offline   Reply With Quote

Reply

Tags
boundary conditions, elsa, reynolds stress model, rsm, turbulence


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
Reynolds stress transport model with elliptic relaxation xiao OpenFOAM Running, Solving & CFD 1 February 15, 2020 13:06
Parameters of R variable in LRR model (Reynolds Stress Model)? ebtedaei OpenFOAM Running, Solving & CFD 0 December 15, 2016 03:35
RSM low Re Stress - Omega convergence issues Jonathan FLUENT 1 April 20, 2016 06:33
Reynolds Stress Model Cui CFX 1 July 17, 2003 13:39
Reynolds Stress Model HC Lin FLUENT 0 October 7, 2002 19:45


All times are GMT -4. The time now is 08:09.