Importing two meshes in fluent

star · July 23, 2013, 04:51

Hello friends. I am using Fluent 14.0. I made two meshes i.e. outer and inner domain in ICEM around airfoil. I merged both domains in ICEM and then i opened it in fluent. now the problem is the boundary between two domains. I don't know what should i consider this boundary. I made it interface but it gives error. What should i do?

agustinvo · July 23, 2013, 05:08

I read "merged"... When I do something like this, I use "Append case file", and after I create the grid interfaces.

I hope this helps you

star · July 23, 2013, 06:55

Thanks Agustin vila for your reply. You mentioned "Append case file" but i couldn't find this option in fluent. Can you elaborate a little.
Also, can I read both domains separately in fluent and merge there? I tried to read separately but the other one replaces.
If any friend can help.. thanks

agustinvo · July 23, 2013, 07:16

Using the Fluent Interface:

Quote:

Grid -> Zone -> Append Case File

Or if you're working on a console

Quote:

grid modify-zones append-mesh

star · July 23, 2013, 12:50

Thanks Agustin. It worked but there is another problem for me. As one boundary of both domains coincides so in fluent I made these two boundaries as interfaces but it gives me error that " unassigned interface zone detected for interface 11" and same for interface 12. Interface 11 and 12 are for these coinciding mesh boundaries. I don't know what should I do. please help

Far · July 23, 2013, 13:21

Code:

Mesh > Zone >  Append Case file

I would first open both meshes one by one and change units, check grid for any problem, rename any conflicting boundary and save them as .cas. After that I would open both meshes by procedure shown above.

star · July 23, 2013, 14:36

Mr. Sijal, I followed your procedure. i read the inner domain first and changed the boundary condition of outer boundary to interface then same procedure for outer domain and changed it's inner boundary to interface. It seemed fine but it gives the same error. When i initialize, it gives these options
WARNING: Unassigned interface zone detected for interface 11
WARNING: Unassigned interface zone detected for interface 12
Error: Init_Flow: unassigned interface_zones
interface 11 and 12 are the coinciding boundaries of two domains(which i think should be).. What should i do, please help. thanks

Far · July 23, 2013, 14:40

After appending both meshes, create interface by selecting both interface boundaries (upstream and downstream) before initializing simulation...

star · July 24, 2013, 04:12

yes it worked now. Thanks Sijal

July 23, 2013, 04:51	Importing two meshes in fluent	#1
star Member Harry Join Date: May 2013 Posts: 68 Rep Power: 12	Hello friends. I am using Fluent 14.0. I made two meshes i.e. outer and inner domain in ICEM around airfoil. I merged both domains in ICEM and then i opened it in fluent. now the problem is the boundary between two domains. I don't know what should i consider this boundary. I made it interface but it gives error. What should i do?

July 23, 2013, 13:21		#6
Far Super Moderator Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,553 Blog Entries: 6 Rep Power: 54	Code: Mesh > Zone > Append Case file I would first open both meshes one by one and change units, check grid for any problem, rename any conflicting boundary and save them as .cas. After that I would open both meshes by procedure shown above.

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July 23, 2013, 05:08		#2
agustinvo Senior Member Agustín Villa Join Date: Apr 2013 Location: Alcorcón Posts: 313 Rep Power: 15	I read "merged"... When I do something like this, I use "Append case file", and after I create the grid interfaces. I hope this helps you

July 23, 2013, 06:55		#3
star Member Harry Join Date: May 2013 Posts: 68 Rep Power: 12	Thanks Agustin vila for your reply. You mentioned "Append case file" but i couldn't find this option in fluent. Can you elaborate a little. Also, can I read both domains separately in fluent and merge there? I tried to read separately but the other one replaces. If any friend can help.. thanks

July 23, 2013, 12:50		#5
star Member Harry Join Date: May 2013 Posts: 68 Rep Power: 12	Thanks Agustin. It worked but there is another problem for me. As one boundary of both domains coincides so in fluent I made these two boundaries as interfaces but it gives me error that " unassigned interface zone detected for interface 11" and same for interface 12. Interface 11 and 12 are for these coinciding mesh boundaries. I don't know what should I do. please help

July 23, 2013, 14:36		#7
star Member Harry Join Date: May 2013 Posts: 68 Rep Power: 12	Mr. Sijal, I followed your procedure. i read the inner domain first and changed the boundary condition of outer boundary to interface then same procedure for outer domain and changed it's inner boundary to interface. It seemed fine but it gives the same error. When i initialize, it gives these options WARNING: Unassigned interface zone detected for interface 11 WARNING: Unassigned interface zone detected for interface 12 Error: Init_Flow: unassigned interface_zones interface 11 and 12 are the coinciding boundaries of two domains(which i think should be).. What should i do, please help. thanks

July 23, 2013, 14:40		#8
Far Super Moderator Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,553 Blog Entries: 6 Rep Power: 54	After appending both meshes, create interface by selecting both interface boundaries (upstream and downstream) before initializing simulation...

July 24, 2013, 04:12		#9
star Member Harry Join Date: May 2013 Posts: 68 Rep Power: 12	yes it worked now. Thanks Sijal