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kehuanshukan

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[ÇóÖú] Çë½ÌfluentÖÐhelpÀïDEFINE_VR_RATEÖР*rateµÈº¬Òå

/*********************************************************************
   UDF for specifying a volume reaction rate
   The basics of ANSYS FLUENT¡¯s calculation of reaction rates: only an
   Arrhenius ("finite rate" reaction rate is calculated
   from the inputs given by the user in the graphical user interface
 **********************************************************************/
 
 #include "udf.h"
 
 DEFINE_VR_RATE(vol_reac_rate,c,t,r,wk,yk,rate,rr_t)
 {
    real ci, prod;
    int i;
 
   /* Calculate Arrhenius reaction rate */
    prod = 1.;
    for(i = 0; i < r->n_reactants; i++)
      {
        ci  = C_R(c,t) * yk[r->reactant] / wk[r->reactant];
        prod *= pow(ci, r->exp_reactant);
      }
      *rate = r->A * exp( - r->E / (UNIVERSAL_GAS_CONSTANT * C_T(c,t))) *
               pow(C_T(c,t), r->b) * prod;
      *rr_t = *rate;
      /* No "return..;" value. */
 } 

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