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

Tominaga 2011: Which solver for releasing a contaminant?

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

Reply
 
LinkBack Thread Tools Display Modes
Old   February 27, 2014, 06:45
Default Tominaga 2011: Which solver for releasing a contaminant?
  #1
Senior Member
 
Join Date: Jul 2009
Posts: 211
Rep Power: 9
kingjewel1 is on a distinguished road
I'd like to release a scalar/dye/contaminant from a volume or point source at a fixed location throughout my simulation- As per the following image.

Which solver/method would you use to model this in openfoam? I'm leaning towards simplifiedSiwek but

kingjewel1 is offline   Reply With Quote

Old   March 2, 2014, 11:07
Default
  #2
Senior Member
 
Join Date: Jul 2009
Posts: 211
Rep Power: 9
kingjewel1 is on a distinguished road
speciesTransportFoam? Anybody done something similar to this? Just want to use a non-reacting tracer gas that includes turbulences and mass.
kingjewel1 is offline   Reply With Quote

Old   March 2, 2014, 15:36
Default
  #3
Senior Member
 
Lieven
Join Date: Dec 2011
Location: Mol, Belgium
Posts: 295
Rep Power: 13
Lieven will become famous soon enough
Hi Kingjewel,

Since it concerns a non-reacting tracer, the tracer does not affect the velocity field so you have two options:
1. If the velocity field is steady steate, you can first solve the flow field using an appropriate solver (e.g. simpleFoam). Next, you can use the generated velocity field in scalarTransportFoam to solve the dispersion. Note that this will require to modify the latter to account for the turbulence diffusion.
2. You can create your own solver which directly combines the two steps above.

Cheers,

L
Lieven is offline   Reply With Quote

Old   March 2, 2014, 15:52
Default
  #4
Senior Member
 
Join Date: Jul 2009
Posts: 211
Rep Power: 9
kingjewel1 is on a distinguished road
Quote:
Originally Posted by Lieven View Post
Hi Kingjewel,

Since it concerns a non-reacting tracer, the tracer does not affect the velocity field so you have two options:
1. If the velocity field is steady steate, you can first solve the flow field using an appropriate solver (e.g. simpleFoam). Next, you can use the generated velocity field in scalarTransportFoam to solve the dispersion. Note that this will require to modify the latter to account for the turbulence diffusion.
2. You can create your own solver which directly combines the two steps above.

Cheers,

L
Thank you for the explanation. I envisaged using LES so ultimately being a transient flow. I have some reservations about using a pure scalar (mainly because of my experience from fluent) and maybe a gas like CO_2 might be more realistic. Any thoughts about a solver or procedure here?
kingjewel1 is offline   Reply With Quote

Old   March 2, 2014, 18:18
Default
  #5
Senior Member
 
Lieven
Join Date: Dec 2011
Location: Mol, Belgium
Posts: 295
Rep Power: 13
Lieven will become famous soon enough
With LES, the easiest will be to start from the pisoFoam or pimpleFoam and add the scalar transport equation to it. Basically combining the piso/pimpleFoam with scalarTransportFoam. You can compute the turbulent diffusion coefficient using the nuSgs of the LES model.

At first, I would start with a passive scalar (one-way coupling). Afterwards, you could add some complexity by adding the effect of the scalar on the wind field...

If you have any other questions, feel free to ask!

Cheers,

L
Lieven 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
3d vof Smaras FLUENT 2 February 19, 2013 07:58
Interfoam blows on parallel run danvica OpenFOAM Running, Solving & CFD 16 December 22, 2012 03:09
CFX 5.5 Roued CFX 1 October 2, 2001 16:49
Setting a B.C using UserFortran in 4.3 tokai CFX 10 July 17, 2001 16:25
Error during Solver cfd guy CFX 4 May 8, 2001 06:04


All times are GMT -4. The time now is 04:16.