discretet BC and UDF

gary7 · June 25, 2010, 21:16

Hi all, I have a data file (and it is provided by an external program) I need to load these values as inlet velocity boundary condition and run the simulation a few time steps and again read the renewed data file when it becomes ready.
I know that I can read in a discrete set of points on boundary through *.prof files but since it's a repeatedly process I need to use UDF for doing this.
How can I develop a UDF in which I can read boundary conditions from a data on the required points of the geometry boundary (data file has the coordinates of the center of the boundary faces together with their respective velocity components) ?

Thanks,

sosososo1114 · June 26, 2010, 09:42

hi! you can write a scheme file to ask fluent to load the profile file and load this scheme file in your case.

gary7 · June 26, 2010, 11:05

Thanks for the reply, but the problem is that I need to load this data file (boundary conditions) when it becomes ready by an external program and so I need to check through an infinite loop for the existence of the new data file and during this loop actually Fluent is doing nothing and it's waiting just for the BC file to be ready. So there is no specific time interval to read the *.profile file through scheme file...can I program such a procedure as I explained in an scheme file? (I'm not familiar with scheme file that much)

June 25, 2010, 21:16	discretet BC and UDF	#1
gary7 Member Kasra Join Date: Jun 2010 Location: USA Posts: 44 Rep Power: 15	Hi all, I have a data file (and it is provided by an external program) I need to load these values as inlet velocity boundary condition and run the simulation a few time steps and again read the renewed data file when it becomes ready. I know that I can read in a discrete set of points on boundary through *.prof files but since it's a repeatedly process I need to use UDF for doing this. How can I develop a UDF in which I can read boundary conditions from a data on the required points of the geometry boundary (data file has the coordinates of the center of the boundary faces together with their respective velocity components) ? Thanks,

June 26, 2010, 09:42		#2
sosososo1114 Member Hongjin Wang Join Date: Mar 2010 Posts: 37 Rep Power: 16	hi! you can write a scheme file to ask fluent to load the profile file and load this scheme file in your case.

June 26, 2010, 11:05		#3
gary7 Member Kasra Join Date: Jun 2010 Location: USA Posts: 44 Rep Power: 15	Thanks for the reply, but the problem is that I need to load this data file (boundary conditions) when it becomes ready by an external program and so I need to check through an infinite loop for the existence of the new data file and during this loop actually Fluent is doing nothing and it's waiting just for the BC file to be ready. So there is no specific time interval to read the *.profile file through scheme file...can I program such a procedure as I explained in an scheme file? (I'm not familiar with scheme file that much)