[A.Rah]

Hi
I want to see the effect of gravity acceleration. I see different result in these situations:

1.DEFINE_SOURCE UDF
2. Without UDF (by enabling gravity option in FLUENT)


Gravity Force by UDF= 679596.5
Gravity Force without UDF= 658589


Any idea please!



--------------------------------------------------------------
#include "udf.h"
DEFINE_SOURCE(z_mom_source, cell, cell_thread, dS, eqn)
{
real source;

real time=CURRENT_TIME;


source = C_R(cell,cell_thread) *9.81;

dS[eqn] = 0;

return source;
}

--------------------------------------------------------------

[A.Rah]

This is strange!
please guide me