UDF for coding CFD ANSYS FLUENT

zuraidah rasep · September 2, 2020, 03:08

Hye

I have question related with coding of UDF that used in ANSYS FLUENT. Viscosity fluid (SAE20W40) change with temperature.

EQUATION: y=438.13e^-0.036x

THE CODING IS:
/************************************************** *******************
UDF for specifying a temperature-dependent viscosity property
************************************************** ********************/

#include "udf.h"

DEFINE_PROPERTY(cell_viscosity, cell, thread)
{
real mu_lam;
real temp = C_T(cell, thread);
mu_lam = 438.13*exp(-0.036*temp);
return mu_lam;
}

is it correct the coding..need advice from here.Thanks again.

AlexanderZ · September 3, 2020, 01:41

code is correct

zuraidah rasep · September 5, 2020, 22:22

thanks a lot..really appreciated your help

September 2, 2020, 03:08	UDF for coding CFD ANSYS FLUENT	#1
zuraidah rasep New Member zuraidah rasep Join Date: Sep 2020 Location: Johor, Malaysia Posts: 4 Rep Power: 5	Hye I have question related with coding of UDF that used in ANSYS FLUENT. Viscosity fluid (SAE20W40) change with temperature. EQUATION: y=438.13e^-0.036x THE CODING IS: /************************************************ *************** UDF for specifying a temperature-dependent viscosity property ********************************************** *****************/ #include "udf.h" DEFINE_PROPERTY(cell_viscosity, cell, thread) { real mu_lam; real temp = C_T(cell, thread); mu_lam = 438.13exp(-0.036*temp); return mu_lam; } is it correct the coding..need advice from here.Thanks again.

September 3, 2020, 01:41		#2
AlexanderZ Senior Member Alexander Join Date: Apr 2013 Posts: 2,363 Rep Power: 34	code is correct zuraidah rasep likes this. __________________ best regards ****************************** press LIKE if this message was helpful

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September 5, 2020, 22:22		#3
zuraidah rasep New Member zuraidah rasep Join Date: Sep 2020 Location: Johor, Malaysia Posts: 4 Rep Power: 5	thanks a lot..really appreciated your help