[openfoam_user]

Dear all,

I have uploaded on our website page dedicated to OpenFOAM applications some pictures and movies done using pimpleDyMFoam and AMI capabilities.

http://www.cfse.ch/cfse/site/openfoam.php

Regards,

Stephane.

[kid]

Thank you for this i am stuck from past few weeks, rotating a cube in regular domain.
Link here:
http://www.cfd-online.com/Forums/ope...tml#post356808

Now, will take a break and see, what you have suggested.

[openfoam_user]

Hi CFDkid,

I have reproduced exactly the propeller tutorial:
~/OpenFOAM-2.1.x/tutorials/incompressible/pimpleDyMFoam/propeller/

Using blockMesh and snappyHexMesh my case blows.

Using ICEM Hexa for generating the grid the case runs fine.

Regards,

Stephane.

[kid]

Good man.
For me ICEM not available. So need to work around sHM or Solome.
Have look at my case in spare time. ( link is in my previous post)

[linnemann]

Originally Posted by openfoam_user

http://www.cfse.ch/cfse/site/openfoam.php

.

Good stuff Stephane.

Really like that you have shared your endeavors :-)

[liping_he]

hi Stephane

I am sorry for my question, but i have no idea about it. This question is also about mesh generation. I have used ICEMCFD to generate mesh with 2 fluid parts and 1 interface between rotoring and moving parts. I have convert the mesh with fluent3DMeshToFoam. The mesh only has ONE FACE (interface mentioned above) patch in AMI1. How can i acquire another face to patch in AMI2. Thanks..

Regards,

he

[openfoam_user]

Hi,

With ICEM Hexa I have ONLY one fluid part. Export in V6 fluent format. Then use the fluent3DMeshToFoam command to convert the mesh.


Try to follow exactly the propeller tutorial. Keep the same names (boundaries, zones, ...). Use the topoSet command to generate face/cell sets and zones (like in the tutorial).

Regards,
Stephane.

[liping_he]

Hello Stephane.

How to obtain the ID of startFace in changeDictionaryDict file in propeller tutorial

Regards,
liping

[openfoam_user]

(1) Open your constant/polyMesh/boundary file.
(2) Compute nFaces + startFace of your last boundary.
(3) Open your changeDictionaryDict file.
(4) startFace (for AMI1 and AMI2) = result computed in (2)

Regards,
Stephane.

[liping_he]

Hi Stephane.

Thanks for your help. For now, following the propeller tutorial I can genarate the AMI1 and AMI2 faces. but the faces are coarse and toothed. look at the picture attached. I have no idea about this issue...

Thanks in advance,
liping

[openfoam_user]

Hi,
no pictures attached.
Stephane.

[liping_he]

HI, Stephane

SORRY..HERE IS THE PICTURE

[lovecraft22]

Are you looking at the correct time step?

[openfoam_user]

Hi he,

The grid doesn't seem to be generated using ICEM Hexa !

You will have problems at the interface between the rotating and the static domains.

Your interface has to be smooth (circle).

See the picture. The pink line is the interface between the rotating and the static parts.

Regards,
Stephane.

[liping_he]

Hi Stephane, lovercraft22

Thanks for your reply. I have know the reason why the AMI1/2 faces show coarse and toothed.
1, the mesh is not generated using circular grid.
2, I should have retained the interface (the AMI1/2 face ) when I created mesh. The createAMIFaces.topoSetDict file can not split grid. It only can create AMI1/2 faces on the basis of original mesh we generated.

Regards,
he

[kid]

Hi stephane,
Does OpenFOAM-210 and OpenFOAM-21x make any difference for implementing AMI feature?
I meant is there any advantage or improvement .

[openfoam_user]

I use OpenFOAM latest git version (OF-2.1.x).
AMI is implemented in OF-2.1.x.

See ~/OpenFOAM-2.1.x/tutorials/incompressible/pimpleDyMFoam/propeller tutorial.

Stephane.

[kid]

Stephane,
Thanks, so that means if we intend to implement AMI, OpenFOAM-21X has to be used.

Actually, while i try to model a problem using AMI in OpenFOAM-210, it throws error. It could be because of my less understanding of it too. But could the version 210 instead of 21x be the culprit too?

[openfoam_user]

Hi,

AMI is already implemented in OF-2.1.x.

My case crashes too, except when I use ICEM (fully structured grid) for grid generation.

Regards,
Stephane.

[kid]

Ok Stephane thanks.

Going to upgrade OF210 to OF21x. Hope to see some improvement.