syntax error while interpreting the UDF

rohit chothave · July 13, 2013, 07:00

Hi all.
I am trying to interpret this UDF for density, given below, in ansys 12, linux OS. I am getting syntax error. Can anybody tell me what is the error. Or what is correct program
/************************************************** *******************
UDF for specifying a temperature-dependent density property
************************************************** ********************/
#include "udf.h"

DEFINE_PROPERTY(rho, cell, thread )

{
real rho1;
real t = C_T(cell, thread);

rho1 = 17.836 + 4444.25 * exp(-t/93.77);

return rho1;
}

/************************************************** *******************
UDF for specifying a temperature-dependent specific heat property
************************************************** ********************/
#include "udf.h"

DEFINE_SPECIFIC_HEAT(specificheat,T,Tref,h,yi)

{
real sp1;

sp1 = 2533.8 + ((5.7266 * pow(9,10)) * (exp(-T/37.137)));

*h = sp1 * (T-Tref);

return sp1;
}

blackmask · July 13, 2013, 07:21

It is not a real syntax error except that

Code:

DEFINE_SPECIFIC_HEAT

is used by compiled udf only.

yashganatra · July 13, 2013, 12:09

Just use #include "udf.h" once at the top. Refer to other threads in UDF section.

Yash

July 13, 2013, 07:00	syntax error while interpreting the UDF	#1
rohit chothave New Member rohit chothave Join Date: Jun 2013 Posts: 2 Rep Power: 0	Hi all. I am trying to interpret this UDF for density, given below, in ansys 12, linux OS. I am getting syntax error. Can anybody tell me what is the error. Or what is correct program /************************************************ *************** UDF for specifying a temperature-dependent density property ********************************************** *****************/ #include "udf.h" DEFINE_PROPERTY(rho, cell, thread ) { real rho1; real t = C_T(cell, thread); rho1 = 17.836 + 4444.25 exp(-t/93.77); return rho1; } /************************************************ *************** UDF for specifying a temperature-dependent specific heat property ********************************************** *****************/ #include "udf.h" DEFINE_SPECIFIC_HEAT(specificheat,T,Tref,h,yi) { real sp1; sp1 = 2533.8 + ((5.7266 pow(9,10)) * (exp(-T/37.137))); h = sp1 (T-Tref); return sp1; }

July 13, 2013, 07:21		#2
blackmask Senior Member Join Date: Aug 2011 Posts: 421 Blog Entries: 1 Rep Power: 22	It is not a real syntax error except that Code: DEFINE_SPECIFIC_HEAT is used by compiled udf only.

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July 13, 2013, 12:09		#3
yashganatra Member Yash Ganatra Join Date: Mar 2013 Posts: 67 Rep Power: 13	Just use #include "udf.h" once at the top. Refer to other threads in UDF section. Yash