[Marya]

Thanks a lot. It worked for me

[gyf135]

The description in the pdf file works for me!

I was trying to load the libudf to Fluent after I thought I have built it. Actually it didn't. Even though there is no error message showing up when I click on the build button.

The problem I encountered was due to a space in the name of my .c file. So I suggest to make a simple name for the .c file. And I found this when I checked the log file under the /libudf/win64/ folder. Hope this would help someone.

[roi247]

Thank you for the help

[Ozair Piracha]

Hey all,
I am using Windows 10 (64 Bits). Would I have to install SDK for Windows 10 to run the Fluent according to the method mentioned in the above posts?
I will be obliged to have any reply.
Thank you.

[Johnr]

Hi,
I have made a udf ".c" file. now i don't know how to load this file in fluent. It basically takes outlet temp at each time step and regulates x momentum source term from that.

I am new to udfs....Help is needed...

[jyothsna k]

1. copy your .c file to your project's 'Fluent' folder
2. In Fluent, go to
Define->User Defined-> Functions->Compiled->Add->(select your file)-> Build
3. if you see any error, rectify it in your .c file , save and compile again(no need to add again. just click 'compile')
4. when you have no errors click on 'Load'
5. hook the udf's and run

[macfly]

Originally Posted by macfly

Only 2 steps did the trick for me in order to compile UDFs in Fluent 14.5 or 15 on Windows 8.1:

- Installing Microsoft Visual Studio Express 2012 for Windows 8: http://www.microsoft.com/en-ca/downl....aspx?id=30664

- Add the path to nmake.exe to the Path environment variable.

Hi all,
I just want to mention that the same setup works just fine for compiling UDFs with Windows 10 64 bit/Fluent 17.0 (even if the Visual Studio version is supposedly for Windows 8).

[jpap87]

Originally Posted by macfly

Hi all,
I just want to mention that the same setup works just fine for compiling UDFs with Windows 10 64 bit/Fluent 17.0 (even if the Visual Studio version is supposedly for Windows 8).

Hey macfly

Pardon my "noobness" but what exactly is/meant by "- Add the path to nmake.exe to the Path environment variable." what do you do exactly?

Thank you very much

[macfly]

How to add the path to nmake.exe to the Path environment variable:
- Go to Control Panel => System => Advanced System Properties => Advanced tab and you should get the window shown on the 1st attached picture.
- Click on Environment Variables...
- Select the Path environment variable and click Edit... (see 2nd attached picture)
- In the Edit environment variable window, click New and add the path where nmake.exe is located under the Visual Studio installation. On my computer it's C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\bin (see 3rd attached picture)

That's it

[jpap87]

Originally Posted by macfly

How to add the path to nmake.exe to the Path environment variable:
- Go to Control Panel => System => Advanced System Properties => Advanced tab and you should get the window shown on the 1st attached picture.
- Click on Environment Variables...
- Select the Path environment variable and click Edit... (see 2nd attached picture)
- In the Edit environment variable window, click New and add the path where nmake.exe is located under the Visual Studio installation. On my computer it's C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\bin (see 3rd attached picture)

That's it

Thank you very much for your help!

[osamaajaz]

i am using MSVB2010 and getting error that is displayed in attached pictures

[osamaajaz]

respected mates, there is a problem i am facing with UDF file. Kindly check and pont out what is the main error

this is code i am using for 2D
and getting the error that is showed in the attached picture


#include "udf.h"
DEFINE_CG_MOTION(move,dt,vel,omega,time,dtime)
{
vel[1] = 0.0942*sin(0.628*time);

}

DEFINE_CG_MOTION(ball1,dt,vel,omega,time,dtime)
{
if (time>0 && time<1)
vel[1]=0.018*time;
else if (time>5 && time<5.1)
vel[1]=-0.0005;
else if (time>5.1 && time<5.5)
vel[1]=-0.035;
else
vel[1]=-0.00;

}

DEFINE_CG_MOTION(ball2,dt,vel,omega,time,dtime)
{
if (time>0 && time<0.4)
vel[1]=-0.01;
else if (time>0.4 && time<5.5)
vel[1]=0.0942*sin(0.628*time);
else if (time>5.5 && time<6.17)
vel[1]=-0.0028;
else
vel[1]=0.0942*sin(0.628*time);
}

[pakk]

You are showing the error that you get when you try to load the UDF. But the problem happened when you tried to compile ("build") the UDF. Show the text that is printed after you click 'build'.

[KevinZ09]

It's saying you don't have a library compiled for your 64-bits OS and 2D solver So compile it and load the library. If it still doesn't work, go through the suggestions in this thread.

[osamaajaz]

how to compile for that
kindly guide me...
do i need to change all coding or some part in that?

[osamaajaz]

Originally Posted by pakk

You are showing the error that you get when you try to load the UDF. But the problem happened when you tried to compile ("build") the UDF. Show the text that is printed after you click 'build'.

it is building but the problem occurs in loading, as showing in the corresponding pictures. i dont know how to fix it
need your guidance

[Boh]

Originally Posted by macfly

How to add the path to nmake.exe to the Path environment variable:
- Go to Control Panel => System => Advanced System Properties => Advanced tab and you should get the window shown on the 1st attached picture.
- Click on Environment Variables...
- Select the Path environment variable and click Edit... (see 2nd attached picture)
- In the Edit environment variable window, click New and add the path where nmake.exe is located under the Visual Studio installation. On my computer it's C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\bin (see 3rd attached picture)

That's it

I think you need to do this to fix the problem

[pakk]

Originally Posted by osamaajaz

it is building but the problem occurs in loading, as showing in the corresponding pictures. i dont know how to fix it
need your guidance

Your first picture clearly indicates that the problem occurs in building. I see the following text:

'nmake' is not recognized as an internal or external command, ...

Your installation of Fluent can not find the compiler. The problem is not in your code.

[osamaajaz]

Originally Posted by pakk

Your first picture clearly indicates that the problem occurs in building. I see the following text:

Your installation of Fluent can not find the compiler. The problem is not in your code.

how to fix it?

[macfly]

Originally Posted by osamaajaz

how to fix it?

UDF - Error loading libudf

Please read the whole thread before participating in it, it's a minimum.