[maccheese]

Hi guys,

I am sorry to ask this question, as i know that the topic udf is somewhat shopworn.

I want to use udfs in ANSYS Fluent. I learned, that I need a C++ Compiler in order to get these to work in ANSYS. Visual Studio is often recommended, since there are versions which can be used for free.

However, Visual Studio 2017 Community has 18 modules which can be choosen during installation process. All these together would take a memory of 50 GB, and this amount of memory is simply not available on my laptop.

The modules are the following:

3 Windows modules:

Development Universal Windows Platform
NET Desktop-Development
Desktop-Development with C++

7 Web and Cloud modules:

ASP.NET and Webdevelopment
Azure-Development
Python-Development
Node.js-Development
Data Storage
Data Science and Analytic Applications
Office-/SharePoint-Development

5 Mobile and Gaming modules:

Mobile Development with .NET
Game Development with Unity
Mobile Development with Java Script
Mobile Development with C++
Game Development with C++

And 3 other Toolsets:

Visual Studio Extension Development
Linux Development with C++
Multi Platform .Net-Core Development

Do I really need to install all the listed modules? The first time I tried to only install the 3 Windows modules, but sadly it didnt work out. So I thought I would better ask some more experienced users, before I start to think about which files on my laptop have to be deleted or transferred to other external hard drives in order to create the necessary space for the 50 GB VS. I still cant imagine that i need the full package to get the desired Compiler. Somewhere around the internet I read an instruction where someone used a older version of VS, and the space mentioned required for the necessary files were below 1 GB...

Thanks in advance, a little help would be highly appreciated.

[Far]

have you gone through this video https://www.youtube.com/watch?v=l4wcXAQ5IGY

[maccheese]

Yes, but it doesnt help me at all regarding the question, which modules of VS 17 I need for using udfs in ANSYS.

I am using the student version of ANSYS 19 by the way.

I will try to get my hands on an older version of VS in the meantime...

[obscureed]

I've had good experience with Microsoft Visual Studio Express 2012 and Fluent UDFs on Windows. Unlike some earlier versions of VS Express, it sets enough environment variables that you can ignore the instructions about "launch Fluent from a yellow command prompt" that used to be thrown around.

[pakk]

Originally Posted by maccheese

I learned, that I need a C++ Compiler in order to get these to work in ANSYS.

This is not correct, unlearn this.
You need a C-compiler.

C++ and C are two different programming languages. They are related, but different. Most compilers for c++ can also compile c, so for your current situation the distinction is not so relevant, but it is good to be aware of this...

[maccheese]

Okay, seems that I misunderstood that.

Anyway, I installed Visual Studio 2012 Express Version and it seems to work now. No need to start Fluent from the command tool or anything, it just works fine automatically. Very nice.

Thanks for your help guys!

[VaishnaviD]

Hello maccheese,

Did you figure out the modules required? Or you are convinced working with visual studio12?

I am trying to download 2 modules only. Will see if it works

[maccheese]

Hi,

no, I still dont know till today. As I wrote, VS 2012 works for me nicely. It works directly after the installation, I tried it on 2 different Computers so far and it worked in both cases.

There is still a VS 2012 exe out there in the internet. I suggest you to give it a try.

[VaishnaviD]

Hey! It worked for me after almost 10 days of working on solution./
I have VS 17, Ansys 19, and Windows 8. having the .c and .h file in same folder helped me. Thank you so much for your solutions!

Originally Posted by maccheese

Hi,

no, I still dont know till today. As I wrote, VS 2012 works for me nicely. It works directly after the installation, I tried it on 2 different Computers so far and it worked in both cases.

There is still a VS 2012 exe out there in the internet. I suggest you to give it a try.

[mrishi]

Hey Vaishnavi,
What modules did you install? My VS Community 17 installation does not have stdio.h file in VC/.../include folder. I tried to jerry rig it copying the header from MingW but it eventually ran into definition errors (understandable, since its gcc).
Anyways, so right now I am trying to get stdio.h into the include folder of VS 17 without installing unnecessary modules.

Originally Posted by VaishnaviD

Hey! It worked for me after almost 10 days of working on solution./
I have VS 17, Ansys 19, and Windows 8. having the .c and .h file in same folder helped me. Thank you so much for your solutions!

Thanks!

[Spicy]

I did not quiet understand what you meant. because I am also facing same problem

[Spicy]

Originally Posted by VaishnaviD

Hey! It worked for me after almost 10 days of working on a solution./
I have VS 17, Ansys 19, and Windows 8. having the .c and .h files in the same folder helped me. Thank you so much for your solutions!

I did not understand. can you explain in which folder we have to put it together?

[AlexanderZ]

having the .c and .h files in the same folder helped me

he is talking here about source files of UDF he was compiling

install VS and run fluent from VS terminal