[DesignModeler] Geometry size limit in Design Modeler?

rjm1982 · March 16, 2018, 10:33

Hello I have encountered some problems when trying to design a computational domain larger than 800m long - does anyone know why?

Basically If I make a rectangle of 900m x 100m and then try to create a surface from the sketch, the surface won't generate. However if I make it 800m x 100m it works!

Is this a limitation that is known to exist in Design Modeler? Is there a way around it? I would really like to run simulations in Fluent with a domain much longer than 800m.

Many thanks in advance,

Richard

Far · March 17, 2018, 04:26

There is support for large problems.

rjm1982 · March 17, 2018, 10:28

Thanks very much Far - so I would need to go through the ANSYS customer support?

Far · March 17, 2018, 11:53

Check the attach snapshots from help.

rjm1982 · March 17, 2018, 15:59

Thank you so much Far! Perfect!
All the best,
Richard

Gert-Jan · March 18, 2018, 11:01

Alternatively, make your model 10 times smaller in all directions and then scale it up by a factor 10 in fluent or CFX. Not too difficult.

Far · March 18, 2018, 11:36

Jan. Brilliant

rjm1982 · March 20, 2018, 05:45

Thanks Jan - I didn't know that was a possibility in Fluent or CFX. I'll keep it in mind for the future

All the best,

Richard

Ehsan-Ar · August 26, 2018, 03:15

Hello
I faced a problem with importing a large scale Catia model(roughly 30*10 kilometers) into the Design Modeler. I also activated the large model support, but the Design Modeler filed to generate it again. I wonder if there is any way of importing such large models into Ansys And about scaling down the entire model in Catia and scaling it up in Fluent(after meshing), is there any same size limitations about the mesh import into the Fluent?
with kind regards.

March 16, 2018, 10:33	Geometry size limit in Design Modeler?	#1
rjm1982 New Member Join Date: Nov 2017 Posts: 15 Rep Power: 9	Hello I have encountered some problems when trying to design a computational domain larger than 800m long - does anyone know why? Basically If I make a rectangle of 900m x 100m and then try to create a surface from the sketch, the surface won't generate. However if I make it 800m x 100m it works! Is this a limitation that is known to exist in Design Modeler? Is there a way around it? I would really like to run simulations in Fluent with a domain much longer than 800m. Many thanks in advance, Richard

March 17, 2018, 04:26		#2
Far Senior Member Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,558 Blog Entries: 6 Rep Power: 54	There is support for large problems. rjm1982 likes this.

August 26, 2018, 03:15	Large scale geometry import problem	#9
Ehsan-Ar New Member ehsan-armoudli Join Date: Jul 2017 Posts: 4 Rep Power: 9	Hello I faced a problem with importing a large scale Catia model(roughly 30*10 kilometers) into the Design Modeler. I also activated the large model support, but the Design Modeler filed to generate it again. I wonder if there is any way of importing such large models into Ansys And about scaling down the entire model in Catia and scaling it up in Fluent(after meshing), is there any same size limitations about the mesh import into the Fluent? with kind regards.

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March 17, 2018, 10:28		#3
rjm1982 New Member Join Date: Nov 2017 Posts: 15 Rep Power: 9	Thanks very much Far - so I would need to go through the ANSYS customer support?

March 17, 2018, 15:59		#5
rjm1982 New Member Join Date: Nov 2017 Posts: 15 Rep Power: 9	Thank you so much Far! Perfect! All the best, Richard

March 18, 2018, 11:01		#6
Gert-Jan Senior Member Gert-Jan Join Date: Oct 2012 Location: Europe Posts: 1,928 Rep Power: 28	Alternatively, make your model 10 times smaller in all directions and then scale it up by a factor 10 in fluent or CFX. Not too difficult.

March 18, 2018, 11:36		#7
Far Senior Member Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,558 Blog Entries: 6 Rep Power: 54	Jan. Brilliant

March 20, 2018, 05:45		#8
rjm1982 New Member Join Date: Nov 2017 Posts: 15 Rep Power: 9	Thanks Jan - I didn't know that was a possibility in Fluent or CFX. I'll keep it in mind for the future All the best, Richard