[yifan111]

Hello, I have a simulation already done in fluent, I want to get the x-velocity, y-velocity, z-velocity at each nodes. I’ve tried to export the solution data with ASCII format. Without choosing any surface, I can get the velocity at all the nodes(total number is 338920) in the domain. If I choose specific surface, it will only write the data on the surface. How can I get the velocity file of a specific cell zone? For example, how to get velocity file for each node in internal cell zone. Once the export file type is set to ASCII, I am not able to select anything in the cell zones. The summation of nodes from each surface is not equal to the total number of the nodes in the domain. Also is there a way to find the number of nodes in each cell zone? I could only find the info for face count.

Any help would be massively appreciated.

[CFDKareem]

File>Export>Profile

You can select the entire cell zone and output the variable of your choosing into a .CSV file.

[yifan111]

Thank you very much for your help, Kareem!

[yifan111]

Originally Posted by CFDKareem

File>Export>Profile

You can select the entire cell zone and output the variable of your choosing into a .CSV file.

Thank you very much for your reply! I've tried FILE>WRITE>PROFILE, however it only contains surfaces. There is no zone selection. The output file contains the velocity for each cell faces instead of nodes. Do you know how to get the velocity for each nodes?

[CFDKareem]

Originally Posted by yifan111

Thank you very much for your reply! I've tried FILE>WRITE>PROFILE, however it only contains surfaces. There is no zone selection. The output file contains the velocity for each cell faces instead of nodes. Do you know how to get the velocity for each nodes?

Ahh my apologies, tested it quickly on a 2D mesh. For a 3D mesh there is three ways to do this, that I know of:

1) Export the results to a CDAT, or CFD post file. You can select and export only the cell zone of interest. In CFD post do File>Export>Export and you can export the x, y, z, +quantities of interest. This will write a pretty nice CSV of the node data. (Do this. It's the easiest and give the best file format)

2) Export the results from Fluent into ACSII format, as you did. You can then export the mesh values for just the zone of interest and use Matlab to compare the two and only take the points of interest.

3) In Fluent do File>Interpolate. You can export an interpolation file of velocity on only 1 cell zone. This file format is a little gross, would not recommend.

[yifan111]

Originally Posted by CFDKareem

Ahh my apologies, tested it quickly on a 2D mesh. For a 3D mesh there is three ways to do this, that I know of:

1) Export the results to a CDAT, or CFD post file. You can select and export only the cell zone of interest. In CFD post do File>Export>Export and you can export the x, y, z, +quantities of interest. This will write a pretty nice CSV of the node data. (Do this. It's the easiest and give the best file format)

2) Export the results from Fluent into ACSII format, as you did. You can then export the mesh values for just the zone of interest and use Matlab to compare the two and only take the points of interest.

3) In Fluent do File>Interpolate. You can export an interpolation file of velocity on only 1 cell zone. This file format is a little gross, would not recommend.

Thank you very much for the suggestions, Kareem! Will definitely try that. Really appreciate it!