UDF for time-dependent velocity polynomial using VOF model
 

For 2D water entry problem with VOF model I want to input the following inlet velocity polynomial

v(t)=2.436+3.82t+326.3t2-7255t3+39381t4
0.0<=t<=0.08
I worte the following UDF but it is not working , if possible please help me. I am beginner in writing UDF
#include"udf.h"
DEFINE_PROFILE(unsteady_velocity, thread, position)
{
face_t f;
real t=RP_Get_Real("flow-time")
begin_f_loop(f,thread)
{
F_PROFILE(f,thread,position)=2.436+3.82 *t+ 326.3*pow(t,2)-7255*pow(t,3)+39381*pow(t,4);
}
end_f_loop(f,thread)
}

Thank you very much

Can you tell about the error you are getting

thank you very much for your reply. actually it does not give any error when i compile it but i am not sure is it ok for my simulation case or not. Do u know what type of boundary condition to need to use for flow separation from sharp corner in case of inviscid model in FLUENT?

Thank you once again for your reply.

hi im soory .have guive mi your tim
 

how to calcul A1.A2.A3....
http://jullio.pe.kr/fluent6.1/help/html/ug/node282.htm

im in th big pb .halp me soory and thanks

How to write UDF for defining the fluid properties???
 

I have set of polynomial equations which defines the water properties like density, thermal conductivity,dynamic viscosity, specific heat capacity and i want to write UDF for my research work. kindly explain me with example.


Link:(https://syeilendrapramuditya.wordpre...ic-properties/)