[Fuergrissa]

I think I have a very simple request, I would like a particular edge in my 2D simulation to oscillate back and forth along the X axis with a specified magnitude and frequency. I made the edge it's own zone and specified rigid body motion and set the adjacent edges to deform.

I'm trying to accomplish this with the 6DOF solver since i've found more examples to look off, but it seems like a UDF specifying the motion or a profile would be easier and more simple then specifying a periodic force and letting the 6DOF solver determine the motion. Any advice for any of these solutions would be very much appreciated. Currently I'm trying to adapt the script shown in the piston and reed valve tutorial (https://youtu.be/BuA6uI2tWuA)

#include "udf.h"
#include "math.h"

DEFINE_SDOF_PROPERTIES(fin1_6dof, prop, dt, time, dtime)
{
prop[SDOF_MASS] = 0.01;
prop[SDOF_IZZ] = 1e-4;
prop[SDOF_ZERO_TRANS_X] = False;
prop[SDOF_ZERO_TRANS_Y] = TRUE;
prop[SDOF_ZERO_TRANS_Z] = TRUE;
prop[SDOF_ZERO_ROT_X] = TRUE;
prop[SDOF_ZERO_ROT_Y] = TRUE;
prop[SDOF_ZERO_ROT_Z] = TRUE;
prop[SDOF_LOAD_F_X] = .001* sin( 3800 * time );
Message("\n 2d : Updated 6DOF properties %e,Fx,%e\n", prop[SDOF_LOAD_F_X], prop[SDOF_MASS]);
}

If I get this to work I will have to experiment with the values to get the displacement I'm looking for.

I'm not well experienced in fluent and especially in C programming so I greatly appreciate as much detail in your response as you are able to give.