Problems with transient flow in CFX

td2e09 · June 17, 2011, 03:44

Good morning everyone. I am currently trying to run a transient problem in Ansys CFX. When I try to load up any one the .trn files in CFD-post, I keep getting the following error message.

ERROR
Error reading file 'C:\Users\td2e09\Desktop\Split channel\Experiments April 2011\600mm_fence_8.6m_from_inlet_003.dir\8.trn':
Error reading number of domains (G/NZN).

My problem has a normal large domain and one subdomain, which I am applying a momentum loss to. Can anyone shed any light on why I might be getting this error message and what it is I am doing wrong. Thank you.

ghorrocks · June 17, 2011, 09:06

Is it a full transient file including the mesh, or a partial one? You cannot load trn file with no meshes by themselves. You need to access it from the results file.

td2e09 · June 17, 2011, 09:15

Quote:

Originally Posted by ghorrocks

Is it a full transient file including the mesh, or a partial one? You cannot load trn file with no meshes by themselves. You need to access it from the results file.

Good afternoon, and thank you for your message. It is a full transient file. I have the results file and can open the results file in CFD post no problem. Then i go to File-Load results, and select the .trn file to open. But then it displays the error message. Do you have any idea what i might be doing wrong here. Thank you

ghorrocks · June 17, 2011, 09:43

If the trn file is a timestep of a run which completed and gave a results file then you do not open the trn file with file-load. You access it by loading the results file and selecting the timestep you wish and it will automatically load the trn file. You do not need to open it yourself.

rezendervp · September 27, 2013, 21:56

Error reading number of domains (G/NZN).

This error is related to no geometrical information from trn file what means no mesh. *.trn, *.bkp, *.res *. def and *. cfx files are all able to be open in CFD-Post if they contain the mesh. verify the size of the files res and trn, if the trn size is much smaller than res, hence the mesh is only in the res files. A FULL bkp is able to load the mesh also.

June 17, 2011, 03:44	Problems with transient flow in CFX	#1
td2e09 New Member Join Date: Aug 2010 Posts: 6 Rep Power: 16	Good morning everyone. I am currently trying to run a transient problem in Ansys CFX. When I try to load up any one the .trn files in CFD-post, I keep getting the following error message. ERROR Error reading file 'C:\Users\td2e09\Desktop\Split channel\Experiments April 2011\600mm_fence_8.6m_from_inlet_003.dir\8.trn': Error reading number of domains (G/NZN). My problem has a normal large domain and one subdomain, which I am applying a momentum loss to. Can anyone shed any light on why I might be getting this error message and what it is I am doing wrong. Thank you.

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June 17, 2011, 09:06		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,870 Rep Power: 144	Is it a full transient file including the mesh, or a partial one? You cannot load trn file with no meshes by themselves. You need to access it from the results file.

June 17, 2011, 09:43		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,870 Rep Power: 144	If the trn file is a timestep of a run which completed and gave a results file then you do not open the trn file with file-load. You access it by loading the results file and selecting the timestep you wish and it will automatically load the trn file. You do not need to open it yourself.

September 27, 2013, 21:56		#5
rezendervp New Member Ricardo Vicente de Paula Rezende Join Date: May 2013 Location: Brazil Posts: 10 Rep Power: 13	Error reading number of domains (G/NZN). This error is related to no geometrical information from trn file what means no mesh. .trn, .bkp, .res . def and *. cfx files are all able to be open in CFD-Post if they contain the mesh. verify the size of the files res and trn, if the trn size is much smaller than res, hence the mesh is only in the res files. A FULL bkp is able to load the mesh also.