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

starcd komsst and v2f models

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   February 18, 2007, 10:22
Default starcd komsst and v2f models
  #1
prc
Guest
 
Posts: n/a
Hello everyone.

I am interested in knowing if any users have used any of the following turbulence models (a. komega sst model, b. v2f model) to predict wall heat transfer coefficients for bench mark problems such as a) jet impinging on a flat plate, b) flow through a sudden expansion. Specifically, I am interested in STAR-CD code performance with the above turbulence model options as implemented in their marketed versions. If any reader wishes to share their experience, I would appreciate it. Thanks

Regards PRC
  Reply With Quote

Old   April 12, 2007, 10:20
Default Re: starcd komsst and v2f models
  #2
Rakesh
Guest
 
Posts: n/a
I have not used in Star-CD but have explored these two models in Fluent for a simpler case of flow through a rectangular channel (aspect ratio of 4:1). My interest was to know the accuracy of the heat transfer co-efficients predicted by these models. Used same grid and other conditions for both the models. An unstructured hybrid grid with prismatic cells near the boundary and tetrahedral in rest of the volume was used. And the results obtained from the two runs were compared with the well known D-B correlation for Nusselt number. Max Y+ was shown to be in an acceptable range of 1-3. V2F predictions looked better overall with an accuracy upto 5-10% (compared 15-20% by SST) in the fully developed region. But I was not satisfied by the predictions made by wither of them in the entrance region. In the entrance region, both of them were underpredicting heavily. V2f was better there too.
  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
Two-fluid models vs mixture models for bubbly flows Hansong Tang Main CFD Forum 6 December 8, 2009 04:21
StarCD and structural Ivan Siemens 2 July 17, 2008 07:56
de-icing using STARCD 4.02 Mike Siemens 1 June 15, 2007 17:35
New to StarCD Matt Siemens 2 September 23, 2005 23:50
Convert from StarCD 3.10 to StarCD 3.15 Jing Siemens 1 April 17, 2002 10:22


All times are GMT -4. The time now is 12:39.