UDF Cavitation problems: Error: chip-exec: function "mass_source_init::libudf" not fo
 

I try to implement UDF:

DEFINE_CAVITATION_RATE

The udf:

/************************************************** *********************
UDF that is an example of a cavitation model different from default.
Can be interpreted or compiled.
************************************************** **********************/
#include "udf.h"
#define c_evap 1.0
#define c_con 0.1

DEFINE_CAVITATION_RATE(c_rate,c,t,p,rhoV,rhoL,mafV ,p_v,cigma,f_gas, m_dot)
{
real p_vapor = *p_v;
real dp, dp0, source;
p_vapor += MIN(0.195*C_R(c,t)*C_K(c,t), 5.0*p_vapor);
dp = p_vapor - ABS_P(p[c], op_pres);
dp0 = MAX(0.1, ABS(dp));
source = sqrt(2.0/3.0*rhoL[c])*dp0;
if(dp > 0.0)
*m_dot = c_evap*rhoV[c]*source;
else
*m_dot = -c_con*rhoL[c]*source;
}

After compilation I see announcement:

Creating user_nt.udf file for 3d ...
(system "copy "C:\PROGRA~1\ANSYSI~1\v145\fluent"\fluent14.5.0\sr c\makefile_nt.udf "libudf\ntx86\3d\makefile" ")
Liczba skopiowanych plik˘w: 1.
(chdir "libudf")()
(chdir "ntx86\3d")()
# Generating ud_io1.h
c_rate1.c
# Generating udf_names.c because of makefile c_rate1.obj
udf_names.c
# Linking libudf.dll because of makefile user_nt.udf udf_names.obj c_rate1.obj
Microsoft (R) Incremental Linker Version 9.00.30729.01
Copyright (C) Microsoft Corporation. All rights reserved.

Creating library libudf.lib and object libudf.exp

Done.

During calculation:

Error: chip-exec: function "mass_source_init::libudf" not found.
Error: chip-exec: function "singhal_fluent::libudf" not found.

iter continuity x-velocity y-velocity z-velocity k epsilon vf-water-vap time/iter
Error: chip-exec: function "mass_source_adjust::libudf" not found.
Error: chip-exec: function "singhal_fluent::libudf" not found.


Where is the problem?

I have no problem with your compiled udf.
Turn on the Singhal et al cavitation model (in fluent command window, solve-->set-->expert), retain all defaults and change to yes to use the Singhal model.
Then compile the udf and hook the udf in function hooks in cavitation mass rate.

Daniele

Thank you very much, now it's working, but I don't have the results, that I expected. Nothing has happend, there is no vapour in my model and I don't know why. I compared with the Zwart model, which is in Fluent and in this solutions I see vapour.