Boundary conditions - Local cylindrical coordinate system

FluentStarter · January 31, 2017, 10:28

Hello guys,

Did anybody of you already use local cylindrical coordinate systems to get profiles on specified boundaries as shown in the picture?

I generated the prof.-file(checked it in Tecplot before) , determined my axis origin and direction(coordinates out of CAD and checked them with the line tool in fluent), initialized the solution and wanted to check the boundaries with a contour plot.
For the velocities everything works fine, but the profile for the mixture fraction is not mapped on the boundary.

Do you maybe have some ideas to troubleshoot?

Thanks in advance

Kushal Puri · February 1, 2017, 08:33

Quote:

Originally Posted by FluentStarter

Hello guys,

Did anybody of you already use local cylindrical coordinate systems to get profiles on specified boundaries as shown in the picture?

I generated the prof.-file(checked it in Tecplot before) , determined my axis origin and direction(coordinates out of CAD and checked them with the line tool in fluent), initialized the solution and wanted to check the boundaries with a contour plot.
For the velocities everything works fine, but the profile for the mixture fraction is not mapped on the boundary.

Do you maybe have some ideas to troubleshoot?

Thanks in advance

You need to define axis origin and axis direction

FluentStarter · February 1, 2017, 09:39

Quote:

Quote:
Originally Posted by FluentStarter

Hello guys,

Did anybody of you already use local cylindrical coordinate systems to get profiles on specified boundaries as shown in the picture?

I generated the prof.-file(checked it in Tecplot before) , determined my axis origin and direction(coordinates out of CAD and checked them with the line tool in fluent), initialized the solution and wanted to check the boundaries with a contour plot.
For the velocities everything works fine, but the profile for the mixture fraction is not mapped on the boundary.

Do you maybe have some ideas to troubleshoot?

Thanks in advance

Quote:

You need to define axis origin and axis direction

Determined+Defined it already .....

FluentStarter · February 7, 2017, 06:41

I made a workaround for my problem.
The thing with the local cylindrical coordinates worked for the velocity components but not for the mixture fraction.
Because of this I transformed the radial data with tecplot to x-y-data with the origin [0,0,0]. Then i calculated the rotation matrix with Matlab, determined the Direction Vector and used the orientate-profile-function in fluent.

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February 7, 2017, 06:41		#4
FluentStarter Member Join Date: Apr 2014 Location: N/A Posts: 50 Rep Power: 12	I made a workaround for my problem. The thing with the local cylindrical coordinates worked for the velocity components but not for the mixture fraction. Because of this I transformed the radial data with tecplot to x-y-data with the origin [0,0,0]. Then i calculated the rotation matrix with Matlab, determined the Direction Vector and used the orientate-profile-function in fluent.