Hello CFD community

I wonder if someone knows a function similar to scanf, which could read string from the screen window. Unfortunately, it seems that Fluent does not support this C function in its UDF.

I really appreciate a suggestion of how to read strings from the window screen by a UDF.

Regards

Alex

Hello Alex

Indeed it is not posible to use SCANF in FLUENT, you must use FSCANF instead ! (Fluent.Inc/fluent6.1/help/html/udf/node39.htm).

Maybe you can put your filename in a special file, which name is unvariant, and read this file with fscanf.

Thierry.

Hello both, function fscanf can read from standard input in C nad C++, I am not sure if it works in Fluent. The only difference is that you use 'stdin' instead of a your pointer to a file. The screen terminal (standard input and output) is treated as a file in this programming language. Hope it helps. Vladimir

Hello Thierry!

Thanks you for thinking a solution for my problem

Actually, I an using fscanf to read the file with invariant name. However, in my case I need to several data file, where the only difference between them is the name. Consequently I am looking for a C function which be able to read the name files from the MAIN FLUENT WINDOW

If you know a way to read these file without changing the name in the user define, compiling and running fluent over and over it will be great.

Best Regards

Alex Munoz

Hello Alex !

I have well understood your problem...and I think it's not possible to access directly to the main fluent window. What I suggested you is reading a file with fscanf, which name is invariant (names.txt for instance), and that includes all the filenames you need.

Example :

names.txt contains : filename_1 filename_2 filename_3

and you use something like that !

char filename[20]; FILE *f; FILE *g;

if ((f=fopen("names.txt","r"))==NULL)

{

Internal_Error("NAMES.TXT NOT FOUND !!\n");

} else nb_files=3; for (i=0; i<nb_files; i++)

{

fscanf(f,"%s\n",filename);

g=fopen(filename,"r");

...

...

fclose(g)

}

fclose(f)

Of course you have to modify this file each time the filenames change, but you can avoid compiling the UDF.

Best regards

Thierry

Hi Thieery

Thanks you for your suggestion, unfortunately i can not do it, The files are extremely large and If I save the cas and data file plus several scalar files, I will run out of computer storage.

I guess I have to live with the problem!

Thank you

Alex