AMI (GGI) to connect 2 parts

falke126 · March 12, 2012, 16:29

Hi to all,
I would like to use 2 stationary parts in a simulation, which are not 1:1 connected by the meshes...

In CFX I just use a ggi to connect them.

Now I would like to test this in OF. Has somebody done this in OF by the new AMI in OF210 and can give me a short advice?

Best regards,

Hannes

linnemann · March 13, 2012, 02:05

Hi look at this tutorial

OpenFOAM-2.1.x/tutorials/incompressible/pimpleDyMFoam/propeller/

falke126 · March 13, 2012, 14:01

Thanks for your response,

i´ve had a look in these tutorials (propeller and the mixerVessel).

My problem is, that in these tutorials the AMI is used for cyclic sections and the interface is some kind of a cylinder barrel...

But I want to use it for a planar circular interface... e.g. to connect two pipe sections.

I hope the problem definition is clear...

I would be pleased, if someone can help me.

Best regards,
Hannes

linnemann · March 13, 2012, 14:07

Hi

Its exactly the same approach.

You just couple two patches, dont matter if they are square/cylinder/disk/plane.

As long as they match sufficiently you're good to go

falke126 · March 13, 2012, 14:50

Hi,

that sounds good

So I just define the 2 patches of type cyclicAMI?

Are there further steps to do, to get the case running?
At the moment I´m not sure, what steps of the propeller tutorial
(e.g topoSet) are needed in my case.

Chris Lucas · March 16, 2012, 03:40

Hi,

you could also have a look at the ggi tools in OpenFOAM-1.6 ext.

Best Regards,
Christian

falke126 · March 20, 2012, 09:04

In the last days I tried another approach - to connect the 2 pipe parts by the mergeMesh + stitchMesh utilities in OF.

Principally that works not so bad. But sometimes non-orthogonal faces are generated. ( *-warning in checkMesh (not ***))

Now I´m thinking about, what is better?

- AMI (GGI) with the original good quality mesh
- direct connection with a slightly worser mesh quality

Best Regards,

Hannes

March 12, 2012, 16:29	AMI (GGI) to connect 2 parts	#1
falke126 New Member Hannes Join Date: Oct 2011 Posts: 19 Rep Power: 14	Hi to all, I would like to use 2 stationary parts in a simulation, which are not 1:1 connected by the meshes... In CFX I just use a ggi to connect them. Now I would like to test this in OF. Has somebody done this in OF by the new AMI in OF210 and can give me a short advice? Best regards, Hannes

March 13, 2012, 02:05		#2
linnemann Senior Member Niels Nielsen Join Date: Mar 2009 Location: NJ - Denmark Posts: 555 Rep Power: 27	Hi look at this tutorial OpenFOAM-2.1.x/tutorials/incompressible/pimpleDyMFoam/propeller/ __________________ Linnemann PS. I do not do personal support, so please post in the forums.

March 13, 2012, 14:07		#4
linnemann Senior Member Niels Nielsen Join Date: Mar 2009 Location: NJ - Denmark Posts: 555 Rep Power: 27	Hi Its exactly the same approach. You just couple two patches, dont matter if they are square/cylinder/disk/plane. As long as they match sufficiently you're good to go __________________ Linnemann PS. I do not do personal support, so please post in the forums.

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March 13, 2012, 14:01		#3
falke126 New Member Hannes Join Date: Oct 2011 Posts: 19 Rep Power: 14	Thanks for your response, i´ve had a look in these tutorials (propeller and the mixerVessel). My problem is, that in these tutorials the AMI is used for cyclic sections and the interface is some kind of a cylinder barrel... But I want to use it for a planar circular interface... e.g. to connect two pipe sections. I hope the problem definition is clear... I would be pleased, if someone can help me. Best regards, Hannes

March 13, 2012, 14:50		#5
falke126 New Member Hannes Join Date: Oct 2011 Posts: 19 Rep Power: 14	Hi, that sounds good So I just define the 2 patches of type cyclicAMI? Are there further steps to do, to get the case running? At the moment I´m not sure, what steps of the propeller tutorial (e.g topoSet) are needed in my case.

March 16, 2012, 03:40		#6
Chris Lucas Senior Member Christian Lucas Join Date: Aug 2009 Location: Braunschweig, Germany Posts: 202 Rep Power: 17	Hi, you could also have a look at the ggi tools in OpenFOAM-1.6 ext. Best Regards, Christian

March 20, 2012, 09:04		#7
falke126 New Member Hannes Join Date: Oct 2011 Posts: 19 Rep Power: 14	In the last days I tried another approach - to connect the 2 pipe parts by the mergeMesh + stitchMesh utilities in OF. Principally that works not so bad. But sometimes non-orthogonal faces are generated. ( -warning in checkMesh (not **)) Now I´m thinking about, what is better? - AMI (GGI) with the original good quality mesh - direct connection with a slightly worser mesh quality Best Regards, Hannes