CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Running, Solving & CFD

setting up a simulation with multiple interactions

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

LinkBack Thread Tools Search this Thread Display Modes
Old   October 2, 2014, 11:15
Default setting up a simulation with multiple interactions
New Member
Paul Handy
Join Date: Sep 2014
Location: Idaho, USA
Posts: 21
Rep Power: 11
phandy is on a distinguished road
I am a complete newbie to openFOAM & CFD, so best regards to my alien jargon.

I want to set up a simulation that has more than 2 moving sets. A cursory web search came up with this link, explaining that interFoam can do two incompressible fluids (including moving meshes).

Specifically, I aim to set up a simulation that has (1) a large set of identical incompressible meshes (think a bucket full of screws, only modeled as cubes), covered in (2) a viscous fluid, on (3) a moving porous platform, interacting with (4) an incompressible gas at a velocity from an inlet to an outlet.

My current plan is to break this up into separate parts to make sure that I am getting the parts done right. I appreciate help getting along this path and putting them together, because I have a lot of questions, but I appreciate help asking the right ones as well.

First, I am going to try to simulate 1 and 2 in its simplest state, with 1 in a mesh volume, covered in alpha1 (2), to set up having a mesh covered in another volume.

Second, I wish to simulate the interactions of 3 moving inside 4.

Third, I would like to bring them together for the simulation of the whole.

Please, help me to correct false assumptions and understand the best way of modeling this.

For the first simulation, I assumed that interFoam would be the solver of choice after watching this video. Ideally, I would take a *.step file that has the solid volume and another *.step file with the fluid modeled around it, and place them in a larger volume. I would use Salome, for example, to make both meshes separately (although together is fine as well), and export that to unv file(s), and use ideasUnvToFoam to bring them in. Would this work? If so, how would I define the one mesh volume to be my viscous fluid? If not, what would work?

For my second simulation, I really need help. I can't find anything (perhaps because I don't know what to look for) that will let me define one (rigid) mesh as moving through the other (perhaps with symmetry planes at the interaction instead of walls). Since this particular simulation has a moving mesh and moving air, I also assumed interFoam is the solver of choice, but I'm not sure if icoFoam is applicable to this case.

To bring them together in the third simulation (where I have an array of 1 covered in 2, moving on 3, interacting with 4), is interFoam capable of this? Otherwise, is there a separate solver, like multiphaseInterFoam that would be more appropriate?

I have used SALOME successfully once for generating meshes from a standard step file and using that in a simulation. If possible, I would prefer to not have to learn yet another tool, but if it would make my life easier (and is FOSS), I would be more than willing. Any and all help here is much appreciated.
phandy is offline   Reply With Quote

Old   October 6, 2014, 03:16
Senior Member
louisgag's Avatar
Louis Gagnon
Join Date: Mar 2009
Location: Stuttgart, Germany
Posts: 338
Rep Power: 18
louisgag is on a distinguished road
Send a message via ICQ to louisgag
Hello Paul,
I don't have experience with this type of simulation, but for your moving mesh you might want to run the interDyMFoam tutorials and see if you can find something similar to what you need.
You can usually run them by launching the
file in the specific tutorial directory.
Good luck,
louisgag is offline   Reply With Quote


help me, interfoam, multipleinterfoam

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
Huge file sizes when Running VOF simulation aarratia FLUENT 0 May 8, 2014 12:27
Supersonic Nozzle Exhaust Simulation mikeh FLUENT 0 May 1, 2014 21:28
Setting up Flow around a Wing Simulation help Atella CFX 3 January 3, 2010 11:51
Multiple Configuration Simulation Tristan CFX 0 November 13, 2009 23:01
3-D Contaminant Dispersal Simulation Apple L S Chan Main CFD Forum 1 December 23, 1998 10:06

All times are GMT -4. The time now is 05:17.