Change boundary type (UDF/journalfile)

February 12, 2009, 10:49

I am doing an unsteady simulation, and I need to change a lot of my boundary types from "mass-flow-inlet" to "wall" after 2sec, 30sec, 32 sec... Is it possible to do this with a udf?

Where can I find an example of this?

If not, is it possible with a udf to execute a journal file after x seconds??

please help!

February 13, 2009, 02:51

How about using a VB Script file?

In VB Script, there is a function named sleep which may help you. For example,

WScript.sleep 3000

You can use VB Script file sending a command line to an active FLUENT window, for example

Dim WshShell

WshShell.SendKeys "file/read-case-data"&" yes.cas"&"{ENTER}"

Good luck

February 13, 2009, 04:07

I am using a linux computer, so VisualBasic is no option.

February 14, 2009, 10:56

Hi, I would propose to write a journal file using SCHEME if-statements to check the current time. I think that way to be the most convenient. good luck

February 14, 2009, 12:18

Do you know if it is possible to execute a journal-file from a user-defined-function. If yes, how?? Does anybody have an example for me?

February 14, 2009, 13:04

I am not a fluent expert, but I reckon it is not possible to execute journal file via any UDF. Honestly, I cannot even imagine why would you need it! You can execute UDF from journal file

February 12, 2009, 10:49	Change boundary type (UDF/journalfile)	#1
Koen Guest Posts: n/a	I am doing an unsteady simulation, and I need to change a lot of my boundary types from "mass-flow-inlet" to "wall" after 2sec, 30sec, 32 sec... Is it possible to do this with a udf? Where can I find an example of this? If not, is it possible with a udf to execute a journal file after x seconds?? please help!

February 13, 2009, 02:51	Re: Change boundary type (UDF/journalfile)	#2
John Guest Posts: n/a	How about using a VB Script file? In VB Script, there is a function named sleep which may help you. For example, WScript.sleep 3000 You can use VB Script file sending a command line to an active FLUENT window, for example Dim WshShell WshShell.SendKeys "file/read-case-data"&" yes.cas"&"{ENTER}" Good luck

February 13, 2009, 04:07	Re: Change boundary type (UDF/journalfile)	#3
Koen Guest Posts: n/a	I am using a linux computer, so VisualBasic is no option.

February 14, 2009, 10:56	Re: Change boundary type (UDF/journalfile)	#4
bohis Guest Posts: n/a	Hi, I would propose to write a journal file using SCHEME if-statements to check the current time. I think that way to be the most convenient. good luck

February 14, 2009, 12:18	Re: Change boundary type (UDF/journalfile)	#5
Koen Guest Posts: n/a	Do you know if it is possible to execute a journal-file from a user-defined-function. If yes, how?? Does anybody have an example for me?

February 14, 2009, 13:04	Re: Change boundary type (UDF/journalfile)	#6
bohis Guest Posts: n/a	I am not a fluent expert, but I reckon it is not possible to execute journal file via any UDF. Honestly, I cannot even imagine why would you need it! You can execute UDF from journal file

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
¿Change boundary condition type?	David	FLUENT	8	April 17, 2013 12:35
How to change boundary type at calculation time?	Stanislav Kraev	FLUENT	0	December 4, 2006 03:33
Change Boundary type?	ccc	FLUENT	6	January 15, 2004 05:24
How to change the boundary type during computation	Lee	Siemens	2	November 28, 2003 21:01
how to change boundary type in unsteay calculation	cfdfans	FLUENT	5	January 9, 2002 08:16