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#include "udf.h"
DEFINE_SOURCE(heat_flux,cell,thread,ds,eqn)
{
real x[ND_ND];
real time,r;
real source_heat;
int k,u;
C_CENTROID(x,cell,thread);
time=CURRENT_TIME;
k=(int)((int)(time)/6);
u=(int)(time)%6;
r=0;
if(u>=0&&u<2)
{
        r=sqrt(pow(x[0]+0.2-0.2*(time-6*k),2)+pow(x[1]-0.2,2));
       
        if(r<=0.06&&x[2]>=0&&x[2]<=0.001&&x[1]<=0.2)
                {
                source_heat=8e11*exp(-3000*pow((r-0.005),2));
                ds[eqn] =0;
                }               
        else if(r<=0.06&&x[2]>=0&&x[2]<=0.001&&x[1]>0.2)
                {
                source_heat=4e11*exp(-3000*pow((r-0.005),2));
                ds[eqn] =0;
                }
}
else
{
source_heat= ds[eqn] =0;
}
Message("u=%d,k=%d\n",u,k);
Message("source_heat=%f\n",source_heat);
return source_heat;
}
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r=sqrt(pow(x[0]+0.2-0.2*(time-6*k),2)+pow(x[1]-0.2,2))£»
Message("r=%f\n",r);
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