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zhuangzk

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[ÇóÖú] ÔÚDPMÄ£ÐÍÖÐÈçºÎÇóÒºµÎÓëÆøÌåÏà¶ÔËٶȵÄÀ×ŵÊý

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DEFINE_DPM_DRAG(particle_drag_force, Re, p) ÖеÄRe¾ÍÊÇÏà¶ÔÀ×ŵÊý¡£ÎÒĿǰÏëµ½µÄ·½·¨¾ÍÊÇÓÃUDF¶¨ÒåÏà¶ÔËÙ¶È£¬µ«ºÃÏñ²»¶Ô¡£UDFÈçÏÂÈçÏÂ
real urel£¨cell_t c,Thread *t£©
{
        Thread *t=P_CELL_THREAD(p);
  cell_t c=P_CELL(p);
  real urelx=abs(C_U(c,t)-P_VEL(p)[0]);
  real urely=abs(C_V(c,t)-P_VEL(p)[1]);
  real urelz=abs(C_W(c,t)-P_VEL(p)[2]);
  real urel=sqrt(urelx*urelx+urely*urely+urelz*urelz);
  return urel;
}
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