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Old   April 25, 2012, 03:44
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stephane sanchi
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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.
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Old   April 25, 2012, 03:47
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Thank you for this i am stuck from past few weeks, rotating a cube in regular domain.
Link here:
pimpleDyMfoam simulation keeps blowing up

Now, will take a break and see, what you have suggested.
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Old   April 25, 2012, 03:52
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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.
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Old   April 25, 2012, 03:58
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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)
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Old   April 25, 2012, 10:16
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Quote:
Originally Posted by openfoam_user View Post
Good stuff Stephane.

Really like that you have shared your endeavors :-)
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Old   April 25, 2012, 22:35
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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..

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he
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Old   April 26, 2012, 02:08
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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.
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Old   April 26, 2012, 05:00
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Hello Stephane.

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

Regards,
liping
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Old   April 26, 2012, 05:18
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(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)

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Stephane.
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Old   April 27, 2012, 06:58
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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
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Old   April 27, 2012, 07:16
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Hi,
no pictures attached.
Stephane.
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Old   April 27, 2012, 22:16
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HI, Stephane

SORRY..HERE IS THE PICTURE
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File Type: jpg pp.jpg (60.4 KB, 128 views)
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Old   April 28, 2012, 05:22
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Are you looking at the correct time step?
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Old   April 30, 2012, 02:25
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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.
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Old   May 1, 2012, 20:47
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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
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Old   May 2, 2012, 05:56
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Hi stephane,
Does OpenFOAM-210 and OpenFOAM-21x make any difference for implementing AMI feature?
I meant is there any advantage or improvement .


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Old   May 2, 2012, 06:07
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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.
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Old   May 3, 2012, 00:51
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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?
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Old   May 3, 2012, 02:12
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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.
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Old   May 3, 2012, 03:05
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Ok Stephane thanks.

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