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/********************************************************************* 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 calculatedfrom 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. */ } Óï¾äÖв»Ã÷°×*rateºÍ*rr_tÖÐ*±íʾʲôº¬Òå |
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2Â¥2018-05-23 21:25:14














reaction rate is calculated
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