parse error while interpreting udf

belenscita86 · June 6, 2018, 23:09

Dear friends,
I have created a UDF to include solubility in crystallization process. I need to use logartithm in base 10 for the solubility equation and I have searched how to writte it but I am still getting parse error when interpreting. If somebody can help me I will be grateful.
Fluent reports an error in the line that is underlined and in red in my code.

This is my UDF:

DEFINE_ADJUST(adjust_func, domain)

{

Thread *tc;
real kcl, solub, S, T, solog;
Thread **pt;

mp_thread_loop_c(tc, domain, pt)

{
cell_t cell;

Thread *tp = pt[P_PHASE];

begin_c_loop_int(cell,tc)

{

kcl = (C_YI(cell,tp,0)/Mw_KCl)/((C_YI(cell,tp,0)/Mw_KCl)+(1-(C_YI(cell,tp,0)))/Mw_H2O);

T = C_T(cell,tp);

solog = 27.769+(-2500.906/T)-8.323*(double log10 (double T));

solub = pow((10),solog);

S = kcl-solub;

C_UDMI(cell,tc,0) = S;

} end_c_loop_int(cell,tc)

}

}

chienfm · June 7, 2018, 02:38

Hello Ana,

Have you tried this one?

Code:

solog = 27.769+(-2500.906/T)-8.323*log10(T);

belenscita86 · June 7, 2018, 08:16

Hello Ngo,
thank you very much for your response. Actually I tried that one and it worked. Since I saw in ANSYS manual the double one I used initially that one.

June 6, 2018, 23:09	parse error while interpreting udf	#1
belenscita86 New Member Ana Belen Cueva Join Date: Nov 2017 Location: South Korea Posts: 4 Rep Power: 8	Dear friends, I have created a UDF to include solubility in crystallization process. I need to use logartithm in base 10 for the solubility equation and I have searched how to writte it but I am still getting parse error when interpreting. If somebody can help me I will be grateful. Fluent reports an error in the line that is underlined and in red in my code. This is my UDF: DEFINE_ADJUST(adjust_func, domain) { Thread tc; real kcl, solub, S, T, solog; Thread pt; mp_thread_loop_c(tc, domain, pt) { cell_t cell; Thread tp = pt[P_PHASE]; begin_c_loop_int(cell,tc) { kcl = (C_YI(cell,tp,0)/Mw_KCl)/((C_YI(cell,tp,0)/Mw_KCl)+(1-(C_YI(cell,tp,0)))/Mw_H2O); T = C_T(cell,tp); solog = 27.769+(-2500.906/T)-8.323*(double log10 (double T)); solub = pow((10),solog); S = kcl-solub; C_UDMI(cell,tc,0) = S; } end_c_loop_int(cell,tc) } }

June 7, 2018, 02:38		#2
chienfm New Member Ngo Bao Chung Join Date: Sep 2012 Posts: 14 Rep Power: 13	Hello Ana, Have you tried this one? Code: solog = 27.769+(-2500.906/T)-8.323*log10(T);

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June 7, 2018, 08:16		#3
belenscita86 New Member Ana Belen Cueva Join Date: Nov 2017 Location: South Korea Posts: 4 Rep Power: 8	Hello Ngo, thank you very much for your response. Actually I tried that one and it worked. Since I saw in ANSYS manual the double one I used initially that one.