[Sumalika]

Hi,
I am trying to write a UDF to define a breakage rate in population balance modelling(PBM) where I am using discrete phase PBM considering only breakage as a phenomena but I am encountering a parse error.Please help.

The breakage rate function g1(v) is attached to this post and the UDF is as follows:
#include "udf.h"
#include "sg_pb.h"
#include "sg_mphase.h"

DEFINE_PB_BREAKUP_RATE_FREQ(break_up_freq,cell,thr ead,d_1)
{
real f1, f2, rho_d, v, P;
real K1 = 0.00481, K2=0.08, sigma = 0.01368, P = 150000000 ,phi=0.00559 , rho_d= 909, sigma=0.02;

Thread *tm = THREAD_SUPER_THREAD(thread);

v = (4/3)*3.14*pow((d_1)/2, 3);

f1 = pow(v, -1./3.)*pow(P, 1./2.)*pow(rho_d, -1./2.) ;
f2= (-K2*sigma*pow((1.+phi),2.))/(pow(v, 1./3.)*P) ;
return K1*f1*exp(f2);
}

Kindly suggest some changes so that I can avoid getting a parse error in line 123.

[pakk]

Line 123 of which file? The code you show now does not have 123 lines.

[Sumalika]

Thank you for the response,sir.

Basically I wrote a C source file and interpreted it in ansys and in response I get the following message:

C:\PROGRA~1\ANSYSI~1\v150\fluent\ntbin\win64\cpp.e xe -I"C:\PROGRA~1\ANSYSI~1\v150\fluent\fluent15.0.0/src" -I"C:\PROGRA~1\ANSYSI~1\v150\fluent\fluent15.0.0/cortex/src" -I"C:\PROGRA~1\ANSYSI~1\v150\fluent\fluent15.0.0/client/src" -I"C:\PROGRA~1\ANSYSI~1\
150\fluent\fluent15.0.0/multiport/src" -I. -DUDFCONFIG_H="<udfconfig.h>" "E:\simulation\23.9\150 Mpa_files\dp0\FFF-1\Fluent\udf.c"
Error: E:\\simulation\\23.9\\150 Mpa_files\\dp0\\FFF-1\\Fluent/sg_pb.h: line 123: parse error.

I thought the first three lines meant line 123.
Can you kindly point out where I am going wrong.Really appreciate your help.

[pakk]

Hmm... The error points to one of Fluent's files.

I can think of only one thing: remove '#include "sg_pb.h"' from the code. According to the help, this should be included in udf.h anyway, so it is a bit strange that the in the example in the help this is also included separately.

If that does not help, I don't know... (Except for the advice to compile your code in stead of interpreting.)

[Sumalika]

I tried what you suggested but I continue to get the same error. Also when I try to compile it in visual studio , I get the following error :

Value cannot be null.
Parameter name: solutionDirectory

I need to input this breakage rate in population balance model as a UDF.

Suggestion of any other alternatives would be really helpful.

[nnf]

Hi everyone

I should use population balance method in my simulation and I need to consider the adhesion of second phase to the wall but the problem is that the model is eulerian-eulerian and I don't know how to consider the adhesion to the wall. I appreciate if you help me.