UDRGM Error
 

Hi everyone!

I would like to model a condensing R22 vapor, and initially I started an example by modelling the User Defined Real Gas Model (UDRGM) given in the manual : https://www.afs.enea.it/project/nept...ug/node337.htm

I have compiled and built the code, but when I load it, I receive this warning message:

myGas.c

..\..\src\myGas.c(135): warning C4113: 'double (*)(double,double,double *)' differs in parameter lists from 'double (*)(cxboolean,double,double,double *)'





If I ignore the message and Hybrid Initialize, I get a message indicating:

turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 6250 cells



Then, when I run the calculation,

# Divergence detected in AMG for temperature, protective actions enabled!

and the calculation stops.

When I change relaxation, I only achieve 5-10 iterations which diverge dramatically. When I checked the results in Post-Processing, I realized that the pressure values are unrealistic, and std. initialization by default tries to initialize pressure to 2.e-11 Pa



Additional background info:

I run fluent from VS 2019 Command Prompt and then load my .MSH file from dp0/FFF/mech in order to build the UDF properly.
The geometry is a simple 2D rectangle (10mm x 100mm)
BC's:

Inlet: mass flow (0.001 kg/s)
Outlet: pressure outlet (0 pa gauge)
Temperature is patched to 300K


Any help is appreciated. Thanks.

SOLVED. The UDRGM provided in the link is outdated, the one in the ANSYS software user's guide is working flawlessly.