using UDS in DEFINE_SPECIFIC_HEAT

cypsela · October 26, 2010, 09:05

Hey all,

I'm currently having a problem with using DEFINE_SPECIFIC_HEAT.

From the UDF guide, the macro should be defined by
DEFINE_SPECIFIC_HEAT(name, T, Tref, h,yi)

Hówever for my work, instead of yi, I would like to use the mass fraction entered separately as User Defined Scalars. And to access the UDS I use C_UDSI(c,t,i) of course.

Since c and t is not defined in the parentheses, i included
cell_t c;
Thread *t;
in the macro. Still, it doesnt allow me to get the values of C_UDSI(c,t,i) that I need for my calculations.

Am I doing it wrongly or is there another way to actually get the UDS values to be used in my DEFINE_SPECIFIC_HEAT?
Language used is C.
Thanks loads!

highhopes · June 25, 2012, 13:21

I too need an answer to this question. I am desperately trying to find a way to find the specific heat capacity of a mixture.

estevaotolentino · June 13, 2017, 13:58

Hi,

I'm having a similar problem and I would like to know if this issue has been solved. If so, how was it solved? Thank you.

October 26, 2010, 09:05	using UDS in DEFINE_SPECIFIC_HEAT	#1
cypsela New Member Lorreine Join Date: Aug 2010 Posts: 4 Rep Power: 16	Hey all, I'm currently having a problem with using DEFINE_SPECIFIC_HEAT. From the UDF guide, the macro should be defined by DEFINE_SPECIFIC_HEAT(name, T, Tref, h,yi) Hówever for my work, instead of yi, I would like to use the mass fraction entered separately as User Defined Scalars. And to access the UDS I use C_UDSI(c,t,i) of course. Since c and t is not defined in the parentheses, i included cell_t c; Thread *t; in the macro. Still, it doesnt allow me to get the values of C_UDSI(c,t,i) that I need for my calculations. Am I doing it wrongly or is there another way to actually get the UDS values to be used in my DEFINE_SPECIFIC_HEAT? Language used is C. Thanks loads!

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June 25, 2012, 13:21		#2
highhopes Member Join Date: Feb 2011 Posts: 62 Rep Power: 15	I too need an answer to this question. I am desperately trying to find a way to find the specific heat capacity of a mixture.

June 13, 2017, 13:58		#3
estevaotolentino New Member Estêvão Lannes Tolentino Join Date: Oct 2016 Posts: 9 Rep Power: 10	Hi, I'm having a similar problem and I would like to know if this issue has been solved. If so, how was it solved? Thank you.