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

Questions on dynamicTopoFvMesh: No mesh update

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

Reply
 
LinkBack Thread Tools Display Modes
Old   October 16, 2014, 09:14
Default Questions on dynamicTopoFvMesh: No mesh update
  #1
Senior Member
 
Paritosh Vasava
Join Date: Oct 2012
Location: Lappeenranta, Finland
Posts: 725
Rep Power: 16
vasava will become famous soon enough
I am trying a simple simulation where a cross is rotating inside a cylinder. My problem is that the mesh does not update.

I have modified angularOscillatingDisplacement boundary condition for circular motion and used that boundary condition for the rotational movement.

Could someone please help me correct this case? Perhaps the problem is trivial but I can't find whats wrong with the case.

Here are link to the case and boundary condition.
http://www.mediafire.com/download/xi...trv3/cross.zip
http://www.mediafire.com/download/74...arVelocity.zip
vasava is offline   Reply With Quote

Old   October 20, 2014, 02:30
Default
  #2
Senior Member
 
Paritosh Vasava
Join Date: Oct 2012
Location: Lappeenranta, Finland
Posts: 725
Rep Power: 16
vasava will become famous soon enough
The problem with my simulation is that the motion of the boundary is right but the mesh does not update.

I still think that I do not understand the slipPatches and freeLengthScalePatches conditions so well. To me slipPatches are the boundaries with some constraints or fixedValuePatches. And freeLengthScalePatches are the boundaries where the length scale of the mesh is calculated by the motion solver.

I have played around with everything but the mesh simply does not update.

I hope this is the right thread to ask questions about mesquite motion solver.
vasava is offline   Reply With Quote

Old   April 12, 2015, 16:28
Default
  #3
Super Moderator
 
Bruno Santos
Join Date: Mar 2009
Location: Lisbon, Portugal
Posts: 10,125
Blog Entries: 39
Rep Power: 110
wyldckat is a glorious beacon of lightwyldckat is a glorious beacon of lightwyldckat is a glorious beacon of lightwyldckat is a glorious beacon of lightwyldckat is a glorious beacon of lightwyldckat is a glorious beacon of light
Greetings Paritosh,

As I mentioned in a private message I sent you a few days ago, I've had these 2 posts of yours on my to-do list for quite sometime now.
I've now moved these two posts from the original thread http://www.cfd-online.com/Forums/ope...ofvmesh-3.html - to an independent thread, to make it easier to address your issue in particular.

I'll quote a part of one of the private messages you've sent me, since it provides important details:
Quote:
I have been trying to learn to use dynamic mesh in openFoam. I am using openFoam 2.3 and have installed dynamicTopoFvMesh solver. The solver is connected to mesquiteMotionSolver library.

I could compile both, the library and the solver, by going through numerous posts in the forum. Right now I am assuming that I have compiled everything correctly.

I also found some of the tutorials from training sessions in one of the OpenFOAM workshops. Some tutorials ran ok and some did not.
Very well, I need to know the following:
  1. Which tutorials worked OK and which didn't?
  2. The files that you shared in the first post on this new thread, are they still valid for running with OpenFOAM 2.3?
  3. Are you using OpenFOAM 2.3.0 or 2.3.1?
Best regards,
Bruno
__________________
wyldckat is offline   Reply With Quote

Old   April 13, 2015, 02:32
Default
  #4
Senior Member
 
Paritosh Vasava
Join Date: Oct 2012
Location: Lappeenranta, Finland
Posts: 725
Rep Power: 16
vasava will become famous soon enough
Thanks for answering my queries. Also its good to move the discussion here so that others can benefit too!!

Quote:
Originally Posted by wyldckat View Post
[LIST=1][*]Which tutorials worked OK and which didn't?
  1. 1 circCylinder3dHex in the folder moveDynamicMesh folder: The tutorial runs for the full time as in the controlDict file. But when I check the results I see nodes move far from the original mesh and thus the mesh in the intermediate times is with very bad quality. Strangely despite the bad quality the simulation finishes without any complain from openFoam.
  2. 2 ballTranslation in the folder moveDynamicMeshNoCheck: There is no solver name in the controlDict file in the tutorial.
  3. 3 needleValveClosure in the folder moveDynamicMeshNoCheck: he tutorial uses solver 'icoFoamAutoMotion which I guess is either no more in the package or is modified to some other solver. Perhaps *.*DyMFoam.
Quote:
Originally Posted by wyldckat View Post
[LIST=1][*]The files that you shared in the first post on this new thread, are they still valid for running with OpenFOAM 2.3?
Yes. I havent made any changes to openFoam, the dynamic mesh solver and the angular velocity boundary condition.

Quote:
Originally Posted by wyldckat View Post
[LIST=1][*]Are you using OpenFOAM 2.3.0 or 2.3.1?
I am using openFoam 2.3.0.

The tutorials circCylinder3d, circTest, circCylinder3d and movingCylinders ran fine and I tried to use setup from these tutorials to create my own case.
vasava 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
Water Turbine 6Dof+Dynamic Mesh Questions thezack FLUENT 2 March 7, 2017 23:35
SnappyHexMesh for internal Flow vishwa OpenFOAM Native Meshers: snappyHexMesh and Others 24 June 27, 2016 08:54
[ICEM] surface mesh merging problem everest ANSYS Meshing & Geometry 44 April 14, 2016 06:41
Add Mesh Layers doesnt work on the whole surface Kryo OpenFOAM Native Meshers: snappyHexMesh and Others 8 September 13, 2012 09:28
Icemcfd 11: Loss of mesh from surface mesh option? Joe CFX 2 March 26, 2007 18:10


All times are GMT -4. The time now is 09:49.