how to setup cyclic patch pair?

phsieh2005 · April 20, 2012, 13:05

Dear OpenFOAMers,

I have a channel with an inlet and an outlet. The points are matched on both the inlet and the outlet. Is there a way to convert the inlet and the outlet into a cyclic pair? Thanks!

Pei-Ying

baserinia · April 20, 2012, 13:18

Hi,
I think the OpenFOAM documentation (link) answers your question.

phsieh2005 · April 20, 2012, 18:37

Hi, baserinia,

Thanks for the link!

But, if I already have a mesh that has an Inlet patch and an Outlet patch, is there a way to convert the Inlet patch and the Outlet patch into a cyclic pair?

Pei-Ying

mturcios777 · April 20, 2012, 19:52

If you already have a mesh, you can edit the constant/polyMesh/boundary file and change the definition from patch to cyclic/cyclicAMI. If your patches are non-conformal, you will need to use cyclicAMI. There will be several entries that will need to be supplied; have a look at the $FOAM_TUTORIALS/incompressible/simpleFoam/pipeCyclic case to get started.

phsieh2005 · April 20, 2012, 20:03

Thanks a lot mturcios777,

I will give it a try this weekend.

Pei-ying

phsieh2005 · April 21, 2012, 08:14

Hi, mturcios777,

WOW, this pipeCyclic case is quite complicated. I have never encountered #codeStream before.

After I finished running the case using ./Allrun, I cannot even do reconstructPar and/or paraFoam/paraview to process the results.

Pei-Ying

mturcios777 · April 23, 2012, 13:31

What version of OF are you running? If you haven't modified the tutorial case it should reconstruct just fine.

In the future, please follow the guidelines in this thread to get a better chance that we can help you:

http://www.cfd-online.com/Forums/ope...-get-help.html

Good luck!

phsieh2005 · April 25, 2012, 09:51

Thanks a lot Marco!

I am using OpenFOAM-2.1.x on OpenSUSE 12.1.

I am not able to do reconstructPar. It looks like I will have to set

allowSystemOperations 1;

in $WM_PROJECT_DIR/etc/controlDict

It looks like #codeStream is a powerful way to specify BC using C++. This is something new to me and will have to learn it in more detail to understand it.

Anyhow, this example is sufficient for me know how to set cyclicAMI.

Pei-Ying

April 20, 2012, 13:05	how to setup cyclic patch pair?	#1
phsieh2005 Senior Member Pei-Ying Hsieh Join Date: Mar 2009 Posts: 334 Rep Power: 18	Dear OpenFOAMers, I have a channel with an inlet and an outlet. The points are matched on both the inlet and the outlet. Is there a way to convert the inlet and the outlet into a cyclic pair? Thanks! Pei-Ying

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April 20, 2012, 13:18		#2
baserinia New Member A.R. Baserinia Join Date: Jan 2010 Location: Canada Posts: 24 Rep Power: 16	Hi, I think the OpenFOAM documentation (link) answers your question.

April 20, 2012, 18:37		#3
phsieh2005 Senior Member Pei-Ying Hsieh Join Date: Mar 2009 Posts: 334 Rep Power: 18	Hi, baserinia, Thanks for the link! But, if I already have a mesh that has an Inlet patch and an Outlet patch, is there a way to convert the Inlet patch and the Outlet patch into a cyclic pair? Pei-Ying

April 20, 2012, 19:52		#4
mturcios777 Senior Member Marco A. Turcios Join Date: Mar 2009 Location: Vancouver, BC, Canada Posts: 740 Rep Power: 28	If you already have a mesh, you can edit the constant/polyMesh/boundary file and change the definition from patch to cyclic/cyclicAMI. If your patches are non-conformal, you will need to use cyclicAMI. There will be several entries that will need to be supplied; have a look at the $FOAM_TUTORIALS/incompressible/simpleFoam/pipeCyclic case to get started.

April 20, 2012, 20:03		#5
phsieh2005 Senior Member Pei-Ying Hsieh Join Date: Mar 2009 Posts: 334 Rep Power: 18	Thanks a lot mturcios777, I will give it a try this weekend. Pei-ying

April 21, 2012, 08:14		#6
phsieh2005 Senior Member Pei-Ying Hsieh Join Date: Mar 2009 Posts: 334 Rep Power: 18	Hi, mturcios777, WOW, this pipeCyclic case is quite complicated. I have never encountered #codeStream before. After I finished running the case using ./Allrun, I cannot even do reconstructPar and/or paraFoam/paraview to process the results. Pei-Ying

April 23, 2012, 13:31		#7
mturcios777 Senior Member Marco A. Turcios Join Date: Mar 2009 Location: Vancouver, BC, Canada Posts: 740 Rep Power: 28	What version of OF are you running? If you haven't modified the tutorial case it should reconstruct just fine. In the future, please follow the guidelines in this thread to get a better chance that we can help you: http://www.cfd-online.com/Forums/ope...-get-help.html Good luck!

April 25, 2012, 09:51		#8
phsieh2005 Senior Member Pei-Ying Hsieh Join Date: Mar 2009 Posts: 334 Rep Power: 18	Thanks a lot Marco! I am using OpenFOAM-2.1.x on OpenSUSE 12.1. I am not able to do reconstructPar. It looks like I will have to set allowSystemOperations 1; in $WM_PROJECT_DIR/etc/controlDict It looks like #codeStream is a powerful way to specify BC using C++. This is something new to me and will have to learn it in more detail to understand it. Anyhow, this example is sufficient for me know how to set cyclicAMI. Pei-Ying