[DesignModeler] How to make sure that two bodies are really in contact?

yahya · December 20, 2012, 19:17

Hi all,

If I have two bodies excatly next to each other, how to make sure that they are really in contact, i.e. how to ensure that the two bodies are really in contact with one sharing interface?

And how we can keep two bodies in contact as two separate bodies of one single part, without merging and forming single body? Do I need to keep them as freezing bodies or is there any other method to keep them separated (or sliced)

best regards,
Yahya

evcelica · December 20, 2012, 21:53

Yes you use freeze or add frozen to keep them from merging. To make sure they are in contact, model them that way, but even if they are not in perfect contact you can still apply interfaces between them if you are using CFX (and perhaps other programs too)

yahya · December 20, 2012, 22:01

Im using Designmodeler to simulate fluent flow
So im NOT using CFX

jrunsten · December 21, 2012, 03:26

Well you are only using DesignModeler to prepare the geometry. CFX is an example of solver software.

You can make sure that they are in contact by unfreezing them. If the bodies merge into one, they are in contact. Then you can delete the unfreeze from the outline tree

yahya · December 21, 2012, 05:06

Thanks jrunsten for your help
One last thing does it matter if the body if freezing or active
When i go to the next step (meshing and simulation) i.e. there is no problem
Of keeping the bodies frozen?

jrunsten · December 21, 2012, 05:08

You can have them frozen or not, it does not matter in meshing

December 20, 2012, 19:17	How to make sure that two bodies are really in contact?	#1
yahya Member yahya Join Date: Jul 2012 Posts: 43 Rep Power: 14	Hi all, If I have two bodies excatly next to each other, how to make sure that they are really in contact, i.e. how to ensure that the two bodies are really in contact with one sharing interface? And how we can keep two bodies in contact as two separate bodies of one single part, without merging and forming single body? Do I need to keep them as freezing bodies or is there any other method to keep them separated (or sliced) best regards, Yahya

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December 20, 2012, 21:53		#2
evcelica Senior Member Erik Join Date: Feb 2011 Location: Earth (Land portion) Posts: 1,188 Rep Power: 23	Yes you use freeze or add frozen to keep them from merging. To make sure they are in contact, model them that way, but even if they are not in perfect contact you can still apply interfaces between them if you are using CFX (and perhaps other programs too)

December 20, 2012, 22:01		#3
yahya Member yahya Join Date: Jul 2012 Posts: 43 Rep Power: 14	Im using Designmodeler to simulate fluent flow So im NOT using CFX

December 21, 2012, 03:26		#4
jrunsten Senior Member Josef Runsten Join Date: Jul 2010 Location: Gothenburg, Sweden Posts: 188 Rep Power: 24	Well you are only using DesignModeler to prepare the geometry. CFX is an example of solver software. You can make sure that they are in contact by unfreezing them. If the bodies merge into one, they are in contact. Then you can delete the unfreeze from the outline tree

December 21, 2012, 05:06		#5
yahya Member yahya Join Date: Jul 2012 Posts: 43 Rep Power: 14	Thanks jrunsten for your help One last thing does it matter if the body if freezing or active When i go to the next step (meshing and simulation) i.e. there is no problem Of keeping the bodies frozen?

December 21, 2012, 05:08		#6
jrunsten Senior Member Josef Runsten Join Date: Jul 2010 Location: Gothenburg, Sweden Posts: 188 Rep Power: 24	You can have them frozen or not, it does not matter in meshing