|
[Sponsors] |
June 6, 2011, 23:33 |
udf error
|
#1 |
Senior Member
raymond
Join Date: Nov 2009
Posts: 149
Rep Power: 16 |
I am new in using udf in fluent. I wrote udf to define properties of individual materials and their mixture. Some examples are shown as below:
DEFINE_PROPERTY(nitrous_oxide_viscosity, c, t) { real E; /* self-defined variable for convenience */ real mu; /* calculated viscosity in unit kg/m.s */ real T = C_T(c,t); /* temperature in unit kelvin, K */ const real A = 0.4733; /* dimensionless regression coeficient */ const real B = 21.8; /* dimensionless regression coeficient */ const real C = -0.004923; /* dimensionless regression coeficient */ const real D = -0.000004274; /* dimensionless regression coeficient */ E = A + B/T + C*T + D*T*T; /* self-defined variable for convenience */ mu = 0.001*pow(10, E); /* calculated viscosity in unit kg/m.s */ return mu; /* calculated viscosity in unit kg/m.s */ } DEFINE_PROPERTY(mixture_thermal_conductivity, c, t) { real sum = 0.0; int i; Material *sp; real ktc; Property *prop; mixture_species_loop(THREAD_MATERIAL(t), sp, i) { prop = (MATERIAL_PROPERTY(sp)); ktc = generic_property(c, t, prop, PROP_ktc, C_T(c,t)); sum += C_YI(c,t,i)*ktc; } return sum; } Error appears for simulation. 1 1.#QNBe+00 is shown for all residuals. I did a check and found that udf causing the error. Can pls help me to check is there any mistake to my udf? I totally do not know what wrong is going on. Pls help. Thanks for help. |
|
November 15, 2013, 08:51 |
|
#2 |
Member
mehdimoradi
Join Date: Jun 2013
Posts: 53
Rep Power: 12 |
Hello raymond
Could you sloved the problem associated with UDF? I encountered with the same problem in running of species transport UDF. all of iterations are converged but donot display the residuals. in addition to .QNBe+00 is appered in the iterations. Can you help me? Thanks. Last edited by mehdimoradi.; November 16, 2013 at 11:20. |
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
ParaView for OF-1.6-ext | Chrisi1984 | OpenFOAM Installation | 0 | December 31, 2010 06:42 |
Accessing phi from a fvPatchField at same patch | johndeas | OpenFOAM | 1 | September 13, 2010 20:23 |
Installation OF1.5-dev | ttdtud | OpenFOAM Installation | 46 | May 5, 2009 02:32 |
Problem with compile the setParabolicInlet | ivanyao | OpenFOAM Running, Solving & CFD | 6 | September 5, 2008 20:50 |
Errors running allwmake in OpenFOAM141dev with WM_COMPILE_OPTION%3ddebug | unoder | OpenFOAM Installation | 11 | January 30, 2008 20:30 |