Dear All,
I am very new with UDF,
i am doing the simulation of particle in Fluent by using DPM+UDF,
Could I ask few questions?
1) What should I do with this error?
2) What's different btw Compile and Interpret ?
3) I am trying to use Visual Studio to compile, How can I know that my code has error ? Because I have to click compile from Fluent
Best Regards,
Yannapol S.
Hi Yannapol,
Regarding your error, see the following link. It is the Win 64b error. You can fix it by launching fluent from Windows Command Prompt (follow comments)
http://www.cfd-online.com/Forums/fluent-udf/85610-udf-error-loading-libudf.html
1) Delete libudf folder; do not include .h file (as shown in the Figure); keep the .c file in the same folder where case files are present. Use compiled udf. Build the udf (if you have no errors left in the code, build will be successful) and then load it.
2) Interpreted: Executes code line-by-line; slow and takes memory. Compiled: code is translated in m/c language; creates shared libraries; overcome compilers limitations; efficient way to run udf
3) Ok with VB. You may get the relevant errors while you try to build the udf. The errors and warnings will be displayed in the command window of fluent. You can then make changes in the program and save it. Build it again...if you have no errors left in the code, build will be successful. After this, load udf.
Hi Yannapol. When you have a UDF the structure to single and parallel are totally different. This error is not regarding to x64 o x32 OS only. It is means that this UDF is only to SINGLE run. You can not use it in parallel runs. To do it, the UDF must be re-written to parallel run and include some other *.h . Of course, you need a x64 platform to compile it properly.
You can compile with fluent and without command lines through FLUENT interface, but it need to configure some environment variables . In CFD online it has step-by-step the procedure. Fluent will use the VS compiler to complete your task, hence in Windows there some steps do complete before compile the UDF's but once done, you can loaf the UDF in the Fluent ambient and you figure shows and compile it.
Fluent does not allow to delete files when load or to recompile c function. But you can unload the liudf and then recompile it.
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