|September 14, 2011, 15:36||
Water vapor condensation
Join Date: Aug 2011
Posts: 8Rep Power: 7
I'm trying to simulate the condensation of water vapor of moist air as a mass transfer.
I have a multiphase fluid: phase 1 is a mixture of air and water vapor, and phase 2 is water liquid.
I wrote a UDF where I used a macro called "define_mass_transfer" and compiled it in Fluent. But when I try to initialize the calculation, I receive a "segmentation violation error".
Does anyone know why?
Or can anyone tell me another way to simulate condensation?
The UDF I wrote is this:
real H2O_Saturation_Pressure(real T)
DEFINE_MASS_TRANSFER(vap_condensation,c,t,from_pha se_index,from_species_index,to_phase_index,to_spec ies_index)
real x_h2o, x_sat, w_sat; /* w=mv/ma; x=mv/(ma+mv) */
#define p 101325
x_h2o = C_YI(c,t,from_species_index);
w_sat = 0.622*H2O_Saturation_Pressure(C_T(c,t))/(p-H2O_Saturation_Pressure(C_T(c,t)));
x_sat = w_sat/(1+w_sat);
m_lg = 0.;
if (x_h2o > x_sat)
m_lg = (x_h2o-x_sat)*C_R(c,t);
|Thread||Thread Starter||Forum||Replies||Last Post|
|Water subcooled boiling||Attesz||CFX||7||January 5, 2013 04:32|
|Water vapour condensation in CFX-5.7.1||hdj||CFX||1||November 27, 2005 08:15|
|Separation phenomenon of water, droplet and air||Raymond||CFX||0||July 9, 2004 22:59|
|Terrible Mistake In Fluid Dynamics History||Abhi||Main CFD Forum||12||July 8, 2002 09:11|
|uptodate water distribution network||fredius,magige,tanzanian,(e.a)||Main CFD Forum||0||January 27, 2002 08:10|