Hi there, I managed to set
 

Hi there,

I managed to set up a moving (i.e. shrinking) mesh, and calculate some diffusion on it, seems to work fine.
Now I would like to use the layer addition/removal stuff. Have been searching a lot on forum and wiki - but have to admit I could not get an idea how to use mesh modifiers. Also, there seems not to be any tutorial really using layer removal.

What I tried:
added this to my dynamicFvMeshDict:

bottom
{
type layerAdditionRemoval;
faceZoneName bottomFaces;
minLayerThickness 5e-3;
maxLayerThickness 1e-2;
oldLayerThickness -1;
active on;
}


where bottom is a patch adjacent to which I would like to remove layers.

Apart from this, I am just calling mesh.upgrade() in my application.
However, somethings missing - nothing happens http://www.cfd-online.com/OpenFOAM_D...part/happy.gif
(well, the mesh moves as before and as expected, but no layers are removed...)

Maybe I somehow have to create that facezone - but have no idea how...
Any hints?

Thank you!

Thomas

o.k. .... found and compiled t
 

o.k. .... found and compiled the utility "setSet", and can construct faceSets now. However I am in doubt if a faceSet is the same as a faceZone ... could someone help me, please?

Thanks!

Thomas

Hallo Thomas i am at the sa
 

Hallo Thomas

i am at the same point right now. I have a moving mesh with an oscillating plate. This patch is a wall, called plate. My mesh is deforming too much, so i need layer addition/removal.

It's important for me to solve that problem soon because i have to finish a thesis work.

I would be very thankful for some help.
I use 1.4.1-dev

- Do i need a file called meshModifiers in /constant? How do i introduce such faces rightExtrusionFace and leftExtrusionFace? What are they for?

- In the dynamicMeshDict:
How do i recompile movingConeTopoFvMesh.C for the case that i need another motion.
Desired function: u = dx/dt = VelAmplitude * cos(2*pi*freq*t) = VelAmp * cos(pi*t/VelPeriod)
In movingConeTopoFvMesh.C:
VelAmplitude * sin(t*pi/VelPeriod)

Hello, I would need the same
 

Hello,
I would need the same kind of advice: how do we use the meshModifiers? I have added a meshModifier file in constant/polymesh, however teh solver does not seem to take it into account.
Do I need another line of code to have it understand that I want the meshmodifier to be used?

I am using the last version of OpenFOAM-1.5-dev (on svn) and I am working with the solver InterTrackFoam to simulate the flow of a viscous liquid over a slope.

Thank you in advance.

Virginie

You will need to write your ow
 

You will need to write your own topoChangerFvMesh class, which will incorporate mesh motion and mesh modifiers. There's plenty of examples in the library.

Hrv

Hello to you all,

I was wondering if one of you has had success in implementing a new topoChangerFvMesh class - especially with regard to merging layerAdditionRemoval and dynamic mesh motion.
I'm working on a problem which seems to resemble the one Patrick described very closely - I just use an expanding circular membrane instead of a plate.

I'm playing around with the movingConeTopoFvMesh class at the moment, trying to figure out how I can adapt it to my problem. Still, I fear that for a recently started OpenFOAM rookie it might be difficult to fight through all this without advice - especially with regard to including the mesh motion as well.

I would very much appreciate if anyone could point me to helpful examples of similar topoChangerFvMesh classes, provide some code fragments or any other advice.

Best regards,
Wolfgang