[lazze12]

Hello!

I am doing a VIV investigation on a square cylinder in ANSYS Fluent and Im trying to replicate the results from this article;

http://scitation.aip.org/content/aip...1063/1.4792351

But so far without any luck. A recent test showed that the lift coefficient changed with changed stiffness of the cylinder which feels strange?

My UDF looks like follows:

#include "udf.h"


DEFINE_SDOF_PROPERTIES(sdof_props,prop,dt,time,dti me)
{
real cg;
real k = 118.435;
cg = DT_CG(dt)[1];
prop[SDOF_MASS] = 3;
prop[SDOF_LOAD_F_Y] = -k*cg;
prop[SDOF_ZERO_TRANS_X] = TRUE;
prop[SDOF_ZERO_ROT_X] = TRUE;
prop[SDOF_ZERO_ROT_Y] = TRUE;
}

The lift coefficient should be indepedent of the stiffness, k, right?

Thanks in advance

[bradjas3]

im also doing the same thing may I know how to use udf its self, from what I know is by using the dynamic mesh and select the square ?