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#include"udf.h"
DEFINE_PROPERTY(mykongxilv, cell, thread)
{
  real kongxilv;

  cell_t c;
  Thread *t;
  face_t f;
   real x[ND_ND];
   real xx1,xx2,xx3;
  begin_f_loop(f,thread)
  {
  
   C_CENTROID(x,c,t);
  xx1=x[0];
  xx2=x[1];
  xx3=x[2];
  
  if((xx1<=200)&&(xx1>=0)&&(xx2<=170)&&(xx2>=0))
  {
  if((xx3<=20)&&(xx3>=0.23*xx2))
      kongxilv=0.0000195*xx1*xx1+0.000028607*xx2*xx2-0.005165*xx1-0.006721*xx2+0.0000014244*xx1*xx2+0.73455;
  else if((xx3<=30)&&(xx3>20))
      kongxilv=0.000015265*xx1*xx1+0.00002147*xx2*xx2-0.0041616*xx1-0.005054*xx2+0.0000011186*xx1*xx2+0.6066;
  else if((xx3<=40)&&(xx3>30))
      kongxilv=0.00001072*xx1*xx1+0.0000143*xx2*xx2-0.00299756*xx1-0.003373*xx2+0.00000077545*xx1*xx2+0.46125;
      }
   else kongxilv=0;
   return kongxilv;
   }
   end_f_loop(f,thread)
}
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