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clingch

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²ÉÓÃFLUENT 6.3 UDF Manual.pdf ÖÐË®Õô·¢µÄ³ÌÐò£¬
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DEFINE_HET_RXN_RATE(user_evap_condens_react, c, t, hr, mw,
                     yi, rr, rr_t)
{
    Thread **pt = THREAD_SUB_THREADS(t);
    Thread *tp = pt[0];
    Thread *ts = pt[1];
    int i;
    real concentration_evap_primary, accum = 0., mole_frac_evap_prim,
         concentration_sat ;
    real T_prim = C_T(c,tp); /*primary phase (gas) temperature*/
    real T_sec = C_T(c,ts);  /*secondary phase (droplet) temperature*/
    real diam = C_PHASE_DIAMETER(c,ts);  /*secondary phase diameter*/
real D_evap_prim = C_DIFF_EFF(c,tp,index_evap_primary)       - 0.7*C_MU_T(c,tp)/C_R(c,tp);   
        /*primary phase species turbulent diffusivity*/
    real Re, Sc, Nu, urel, urelx,urely,urelz=0., mass_coeff, area_density,
        flux_evap ;

    if(Data_Valid_P())                          
    {
      urelx = C_U(c,tp) - C_U(c,ts);
      urely = C_V(c,tp) - C_V(c,ts);

      #if RP_3D
        urelz = C_W(c,tp) - C_W(c,ts);
      #endif
      
      urel = sqrt(urelx*urelx + urely*urely + urelz*urelz);
        /*relative velocity*/
     
       Re = urel * diam * C_R(c,tp) / C_MU_L(c,tp);
     
       Sc = C_MU_L(c,tp) / C_R(c,tp) / D_evap_prim ;

       Nu =  2. + 0.6 * pow(Re, 0.5)* pow(Sc, 0.333);

       mass_coeff = Nu * D_evap_prim / diam ;

       for (i=0; i < MAX_SPE_EQNS_PRIM ; i++)
         {
           accum = accum + C_YI(c,tp,i)/mw[prim_index];
         }

       mole_frac_evap_prim = C_YI(c,tp,index_evap_primary )
                   / mw[index_evap_primary][prim_index] / accum;

       concentration_evap_primary = mole_frac_evap_prim * P_OPER
                   / UNIVERSAL_GAS_CONSTANT / T_prim ;

       concentration_sat = psat_h2o(T_sec)/UNIVERSAL_GAS_CONSTANT/T_sec ;

       area_density = 6. * C_VOF(c,ts) / diam ;

       flux_evap = mass_coeff *
            (concentration_sat - concentration_evap_primary ) ;

       *rr = area_density * flux_evap ;                                       
       }
}
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47425804

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clingch(½ð±Ò+1): ¶àлӦÖú£¬³ÌÐòÖÐÓж¨Ò壬ӦΪȫ¾Ö±äÁ¿0¡£ 2011-05-25 08:12:20
index_evap_primary
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2Â¥2011-05-10 09:46:27
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xiegangmai(½ð±Ò+2): ллӦÖú£¡ 2011-05-10 22:33:26
clingch(½ð±Ò+1): ¶àл²ÎÓ룿 2011-07-17 16:37:11
ÒýÓûØÌû:
Originally posted by 47425804 at 2011-05-10 09:46:27:
index_evap_primary
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UDFÊÖ²áµÄÔ­³ÌÐòÓÐÕâôһ¾ä£º
#define  index_evap_primary 0
3Â¥2011-05-10 09:48:03
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clingch

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4Â¥2011-07-14 21:48:33
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yulinjun1986

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xiegangmai: ½ð±Ò+1, лл²ÎÓ룡 2012-05-07 22:37:54
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13386846246

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ÒýÓûØÌû:
4Â¥: Originally posted by clingch at 2011-07-14 21:48:33
ÎҵijÌÐò¶¨ÒåÁË£¬ÁíÍâ²ÉÓñàÒëÐͺͽâÊÍÐ͵Ľá¹û²»Í¬¡£±àÒëµÄ¿Éͨ¹ý£¬µ«³öÏÖÁËеĴíÎó¡£ÓÐÓùýÇÒͨ¹ýµÄ¸ø¸ö½âÊÍ¡£ÊÇ·ñÊÇÈí¼þ°²×°ÎÊÌ⣿

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