Help?- isolated fluid regions

kingjewel1 · January 11, 2010, 12:56

Hi there,

I'm creating the room geometry in Standrews.png and need to include some subdomains for calculation purposes. However I have added these as 'frozen' and consequently they interfere with geometry that is 'cut out' from the main room such as a manequin (see crossection.png and plane2.png). I want the manequin to be void, how can I achieve it keeping the subdomain where it is?

ghorrocks · January 11, 2010, 17:01

Either cut the mannequin out of the geometry to make a cavity and remesh, or use your existing mesh and remove the mannequin region in CFX-Pre from the domain definition.

kingjewel1 · January 11, 2010, 17:12

Thanks for your reply.
I used the cut out method for the mannequin but as the other zones are 'frozen' this has no effect on them. The brown and green areas in the mesh are meant to be subdomains ( is there a better idea?) to be the habitable zone and the bedclothes zone respectively. The reason for this is so i can perform a calculation using an average quantity in the habitable zone. The bedclothes volume will be a momentum source to expel particles created by bed making.
Do you see a solution?

ckleanth · January 11, 2010, 19:36

yea.. do the workbench tutorials in regards to preparing the geometry

kingjewel1 · January 12, 2010, 03:03

Which one in particular discusses this problem?

ghorrocks · January 12, 2010, 16:57

If you don't want to remesh you can do what I suggested originally and just not select the mannequin in the fluid domain.

kingjewel1 · January 12, 2010, 17:36

Quote:

Originally Posted by ghorrocks

If you don't want to remesh you can do what I suggested originally and just not select the mannequin in the fluid domain.

Sorry I must have misunderstood. I'm happy to remesh but cannot work out how to cut out the mannequin from the frozen object in DM. Surely it's possible?

January 11, 2010, 19:36		#4
ckleanth Senior Member George Join Date: Mar 2009 Location: Birmingham, UK Posts: 257 Rep Power: 18	yea.. do the workbench tutorials in regards to preparing the geometry __________________ Top 4 tips 1. Knowledge is everything and Ignorance is dangerous. 2. Understand your limitations and try to eliminate them. 3. Get yerself a bike and hoon the chuffer. You will soon learn why dogs like to hang their heads out the car window. 4. Please before asking any questions on how to run simulations in CFX, go though all the tutorials

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January 11, 2010, 17:01		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,696 Rep Power: 143	Either cut the mannequin out of the geometry to make a cavity and remesh, or use your existing mesh and remove the mannequin region in CFX-Pre from the domain definition.

January 11, 2010, 17:12		#3
kingjewel1 Senior Member Join Date: Jul 2009 Posts: 260 Rep Power: 17	Thanks for your reply. I used the cut out method for the mannequin but as the other zones are 'frozen' this has no effect on them. The brown and green areas in the mesh are meant to be subdomains ( is there a better idea?) to be the habitable zone and the bedclothes zone respectively. The reason for this is so i can perform a calculation using an average quantity in the habitable zone. The bedclothes volume will be a momentum source to expel particles created by bed making. Do you see a solution?

January 12, 2010, 03:03		#5
kingjewel1 Senior Member Join Date: Jul 2009 Posts: 260 Rep Power: 17	Which one in particular discusses this problem?

January 12, 2010, 16:57		#6
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,696 Rep Power: 143	If you don't want to remesh you can do what I suggested originally and just not select the mannequin in the fluid domain.