[gholamghar]

hello
i tried to build a udf library throught:define-user defined-functions-compiled
but i got this error when i tried to build:

fatal error C1083: Cannot open include file: 'stdio.h': No such file or directory.

i copied stdio.h from "D:\Program Files\Microsoft Visual Studio 9.0\VC\crt\src" to "E:\Fluent.Inc\fluent6.3.21\src" then i built it again and it gave me this error:

fatal error C1083: Cannot open include file: 'crtdefs.h': No such file or directory

i did the same and when i tried to build it again i got this one:

E:\Fluent.Inc\fluent6.3.21\src\crtdefs.h(36) : fatal error C1189: #error : ERROR: Use of C runtime library internal header file.


any ideas what should i do to get rid of this error?
thanks

[rohit.mukare7]

hi i m also getting the same reply kindly let me knw if you have solved this problem..

[usman nazir]

If you people have solved the error kindly share how to did this?

[AlexanderZ]

https://www.cfd-online.com/Wiki/Flue...UDF.29_Related

best regards

[usman nazir]

I can only see the following page as shown in the link below with no information.
https://imgur.com/a/zdULh76

[AlexanderZ]

https://www.cfd-online.com/Wiki/Fluent_FAQ

chapter 2.4

best regards

[usman nazir]

Sorry but this specific error is not mentioned on this link.

[AlexanderZ]

Originally Posted by usman nazir

Sorry but this specific error is not mentioned on this link.

you have problems with visual studio, install it properly and set environment variables

best regards

[Stac93]

hi guys,

i have a similar error and couldn't fix it with the steps mentioned before. I use Fluent 19 and VS 2015. i opened fluent via the prompt command and set the working directory to the case and data files. When i try to compile the udf i get the following error:

Copied D:\Christoph\Test 40 udf\zahn_files\dp0\FFF\Fluent/D:\Christoph\Test 40 udf\zahn_files\dp0\FFF\Fluent\Density_Viscosity_ud f.c to libudf1\src Creating user_nt.udf file for 3d_host ...
(system "copy "C:\Programme\ansys inc\v190\fluent"\fluent19.0.0\src\udf\makefile_nt. udf "libudf1\win64\3d_host\makefile" ")
1 Datei(en) kopiert.
(chdir "libudf1")(chdir "win64\3d_host")# Generating ud_io1.h
Density_Viscosity_udf.c
C:\Programme\ansys inc\v190\fluent\fluent19.0.0\src\main\global.h(9): fatal error C1083: Datei (Include) kann nicht ge”ffnet werden: "stdio.h": No such file or directory
Creating user_nt.udf file for 3d_node ...
(system "copy "C:\Programme\ansys inc\v190\fluent"\fluent19.0.0\src\udf\makefile_nt. udf "libudf1\win64\3d_node\makefile" ")
1 Datei(en) kopiert.
(chdir "libudf1")(chdir "win64\3d_node")# Generating ud_io1.h
Density_Viscosity_udf.c
C:\Programme\ansys inc\v190\fluent\fluent19.0.0\src\main\global.h(9): fatal error C1083: Datei (Include) kann nicht ge”ffnet werden: "stdio.h": No such file or directory

Done.

"Datei (Include) kann nicht ge”ffnet werden" means translated: File(Include) cann't be opened(Sorry for the german).
I cann't find the files stdio.h and i am desperate finding a solution.

i appreciate any kind of help
Thanks

[AlexanderZ]

#include <stdio.h>

best regards

[Stac93]

thanks for replying,
do you mean to include this in my code?
like this


/************************************************** *******************
UDF that simulates solidification by specifying a temperature-
dependent viscosity property
************************************************** ********************/
#include "udf.h"
#include "stdio.h"


DEFINE_PROPERTY(HLP46_density, c, t)
{
real rho;

real temp = C_T(c,t);
real pska, A0, A1, B, C, CP0, D, E1, E2, EO, G, RhoO, Toff;
real p = C_P(c,t);

pska = 10 / ((p / 100000)); /*[kg m^-1 s^-2])/(1 [kg m^-1 s^-2])*/
Toff = temp-273.15;
A0 = 0.640157 * 100;
A1 = 0.443242 * 10000; /*[K^-1]*/
B = 0.171801 * 10000;
C = 0.215003;
CP0 = 10000*(A0+A1*temp); /**[J kg^-1 K^-1]**/
D = -0.618199; /** [kg m^-3] **/
E1 = 0.115299 * 10000;
E2 = -0.134291 * 10000;
EO = 0.269774; /** [kg m^-3] **/
G = 0.001; /** [Pa s] **/
RhoO = 0.886860 * 1000; /**[kg m^-3] *10^3**/

rho = Toff*(EO*(1-(exp(-pska/E1)+E2*pska))+D)+RhoO/(1-C*log10((B+pska)/B));
return rho;
}
DEFINE_PROPERTY(cell_viscosity,c,t)
{
real mu_lam, Toff, G, a0, a1, a2, a3, a4, a5, a6, a7, a8, pska;
real T = C_T(c,t);
real p = C_P(c,t);

Toff = T - 273.15 ;/*(1[K])-1*/
G = 0.001;
a0 = 0.716789 * 1000;
a1 = 0.116482 * 1000;
a2 = 0.361897 * 10;
a3 = 0.822870 / 100;
a4 = -0.311457 * 100000;
a5 = 0.570805 * 1000;
a6 = -0.228366;
a7 = -0.562193 / 100;
a8 = 0.300900 / 100000;
pska = 1 / ((p / 100000));
mu_lam = G * exp((a0 - a2 * Toff) / (a1 + Toff)) * exp(((a3 + a4 * pska) * exp(-Toff / (a5 + a6 * pska)) + (a7 + a8 * pska)) * pska);

return mu_lam;
}

because i still have the same error

[AlexanderZ]

I'm not sure about direct solution.
stdio.h is C library, which shold be installed with visual studio

in your case you can just remove

#include "stdio.h"

Ive compiled this code successfully

best regards

[Stac93]

Thanks for your help.

I updated the windows 10 sdk library vor VS and then the code could compile successfully.
i initialized my case with a pressure from 100000Pa and then i applied the density udf in my material settings. Then the following message occured:

999999: mpt_accept: error: accept failed: Invalid argument
999999: mpt_accept: error: accept failedMPI Application rank 0 exited before MPI_Finalize() with status 2


The fl process could not be started.


I tried to look for a solution but i couldn't solve this yet. Has anyone an idea how to solve this error?
Best regards

[pakk]

Print rho to the screen.

Your equation might return a negative value or an extremely high value, that gives problems to Fluent. If this is the case: you have a problem in your equations.