Working with multiple interfaces

JacoGab · December 26, 2015, 10:27

Hi everybody,
I'm an italian engineer who works with STAR-CCM+ and I wonder if someone found (and somehow resolved) my same problem.
I have three regions that have to interface between themselves. In particular, I have two static regions and a moving one, and the moving region interfaces one of the static regions with the overset mesh interface. Then, I need to put an internal interface between the other static region and the two regions coupled with the overset mesh, but this would involve an interface with three surfaces and from what I have understood STAR creates interfaces only between two surfaces per time.

Has anybody dealt with this problem?

I thank you all in advantage for your attention!

fluid23 · January 4, 2016, 14:55

could you post an image explaining this? it is hard to visualize how you would ever need an interface that has 3 surfaces.

JacoGab · January 7, 2016, 05:38

Hi MBdonCFD,
I hope that this image could explain what is the problem. The interface should be set between the three surfaces represented by the star, the surface that should be coupled twice is the one that belongs to region 1.
By now, thanks for your attention!!

fluid23 · January 7, 2016, 09:11

Ah, I see... Could you extend Region 2 (static) so that it totally encapsulates Region 3 (moving). That way the overset mesh interface will be Region 2 <---> Region 3 and the internal interface would be Region 1 <---> Region 2?

JacoGab · January 7, 2016, 11:19

Unfortunately, this isn't possible, as for coupling reasons between region 2 and 3 i have to keep this configuration.

fluid23 · January 7, 2016, 11:29

I would log a case on the steve portal and get a support engineer to assist. I am not sure what to tell you beyond that.

fluid23 · January 7, 2016, 11:32

Actually, I'm not sure if this would work but you could try splitting the interface on region 1 into 2 faces so each has a separate surface for the interface, an inner circle and outer ring (just like what is seen on region 2/region 3 common plane).

JacoGab · January 8, 2016, 04:15

Neither that would work, I've already tried. Maybe I should ask for a support engineer as you suggested!

December 26, 2015, 10:27	Working with multiple interfaces	#1
JacoGab New Member Jacopo Join Date: Dec 2015 Posts: 4 Rep Power: 10	Hi everybody, I'm an italian engineer who works with STAR-CCM+ and I wonder if someone found (and somehow resolved) my same problem. I have three regions that have to interface between themselves. In particular, I have two static regions and a moving one, and the moving region interfaces one of the static regions with the overset mesh interface. Then, I need to put an internal interface between the other static region and the two regions coupled with the overset mesh, but this would involve an interface with three surfaces and from what I have understood STAR creates interfaces only between two surfaces per time. Has anybody dealt with this problem? I thank you all in advantage for your attention!

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January 4, 2016, 14:55		#2
fluid23 Senior Member Matt Join Date: Aug 2014 Posts: 947 Rep Power: 17	could you post an image explaining this? it is hard to visualize how you would ever need an interface that has 3 surfaces.

January 7, 2016, 09:11		#4
fluid23 Senior Member Matt Join Date: Aug 2014 Posts: 947 Rep Power: 17	Ah, I see... Could you extend Region 2 (static) so that it totally encapsulates Region 3 (moving). That way the overset mesh interface will be Region 2 <---> Region 3 and the internal interface would be Region 1 <---> Region 2?

January 7, 2016, 11:19		#5
JacoGab New Member Jacopo Join Date: Dec 2015 Posts: 4 Rep Power: 10	Unfortunately, this isn't possible, as for coupling reasons between region 2 and 3 i have to keep this configuration.

January 7, 2016, 11:29		#6
fluid23 Senior Member Matt Join Date: Aug 2014 Posts: 947 Rep Power: 17	I would log a case on the steve portal and get a support engineer to assist. I am not sure what to tell you beyond that.

January 7, 2016, 11:32		#7
fluid23 Senior Member Matt Join Date: Aug 2014 Posts: 947 Rep Power: 17	Actually, I'm not sure if this would work but you could try splitting the interface on region 1 into 2 faces so each has a separate surface for the interface, an inner circle and outer ring (just like what is seen on region 2/region 3 common plane).

January 8, 2016, 04:15		#8
JacoGab New Member Jacopo Join Date: Dec 2015 Posts: 4 Rep Power: 10	Neither that would work, I've already tried. Maybe I should ask for a support engineer as you suggested!