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

Problems in representing convected derivatives in OpenFoam

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

Reply
 
LinkBack Thread Tools Display Modes
Old   February 5, 2009, 16:46
Default Hi all, I am trying to mode
  #1
Senior Member
 
Antonio Martins
Join Date: Mar 2009
Location: Porto, Porto, Portugal
Posts: 112
Rep Power: 8
titio is on a distinguished road
Send a message via MSN to titio Send a message via Skype™ to titio
Hi all,

I am trying to model the flow of complex fluids in OpenFoam, in particular fluid where normal stresses can be significant. The constitutive equation that I am using, the PTT model, uses a convected derivative, in the form that can be seen in http://en.wikipedia.org/wiki/Upper_c...ime_derivative. That form of derivatives is much used in modelling viscoelastic flows.

I am having problems in representing it in terms of OpenFoam operators. Can anyone help me out. Sorry for not presenting the form of the derivative, but it is to much complex.

António
titio is offline   Reply With Quote

Old   February 16, 2009, 16:01
Default Hi Antonio, you need to inclu
  #2
New Member
 
Kerstin Heinen
Join Date: Mar 2009
Location: Ludwigshafen, Germany
Posts: 27
Rep Power: 8
kerstin is on a distinguished road
Hi Antonio,
you need to include the tensor products in the PDE...
maybe this helps

http://www.cfd-online.com/OpenFOAM_D...es/1/6356.html

Kerstin
kerstin is offline   Reply With Quote

Reply

Thread Tools
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 On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Problem in representing term of PDE titio OpenFOAM Running, Solving & CFD 1 February 6, 2009 15:28
OpenFoam - problems MateuszZb ParaView 8 July 21, 2008 16:16
Representing real length in Gambit souzan FLUENT 4 May 20, 2008 04:34
Ld problems with openfoam srinath OpenFOAM Installation 1 May 2, 2008 07:49
Representing Efficiency in Wind Turbines Jenny FLUENT 1 May 28, 2005 14:34


All times are GMT -4. The time now is 00:36.