[LILILILIBUKAI]

The error you can see in the accessory.
you can connect me with 1255313374@qq.com
Recently，I was using the overset mesh to solve a problem that a rectangle wing flap at its root chord. The wing covered by a smaller inner mesh(figure 1) which boundary condition was overset and a large rectange background mesh(figure 2).The residuals and cd youcan see in the accessory.
the background mesh has velocity inlet \ symmetry\pressure outlet, and i am using euler model.Other set was :Coupled\Least Squares Cell Based
\Pressure:second order \Momentun:Second Order Upwind \ Flow Courant number:200
The wing and the inner mesh was load an UDF which could achieve flapping mtion at its root.this is my udf:
#include "udf.h"
#include "math.h"
#include <stdio.h>
DEFINE_CG_MOTION(heave,dt,vel,omega,time,dtime)
{
real f=10;
omega[0]=15*M_PI/180.0*2*M_PI*f*sin(2*M_PI*f*time);
}
You can see that my wing are able to move periodically.
But everytime i was calculating,Fluent always remaind me"Error:floating point expection" and then stop calculate. this has bother me for quit a long time.I saw the video provided by ANSYS sich as oscillating wing,air wash robot and so on,Don't they have this problem?
sorry ,i can't put picture in the web.

[LILILILIBUKAI]

anybody could help me?