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#include "udf.h"
#include "math.h"
#include "sg_udms.h"
#include "mem.h"

double EA=1.5e5;       /*Aktivierungsenergie*/
double k0=1.0e28;
double m=4.0;
const double pi=3.141593;
const double T=296.15;         /*Temperatue*/
const double Nav=6.02e23;     /*Avogadro*/
const double R_g=8.31;                        /* gas constant */
double A;              /*oberflaechenkonzentration*/
double kg;
double ks;

double m_0,m_1,m_2;

DEFINE_DIFFUSIVITY(partical_diffusivity,c,t,i)
{
        double Sct=0.7;
        double D_tur;
        double D_mol=5e-9;/*¼ÆËãµÃ³ö£¬µ«ÊÇ·¢ÏÖÁ£¾¶Ö±½ÓÓ°Ïì×ÅÊýÁ¿¼¶*/
        real D_eff;

        D_tur=C_MU_T(c,t)/Sct;
        D_eff=D_mol+D_tur;

        return D_eff;
}

DEFINE_SOURCE(surface_source,c,t,dS,eqn)
{
        real a_p0 = 0.4991e-16;           /*TiO2:±íÃæ»ý*/       
        real A ;              /*±íÃæ»ýŨ¶È*/
        double Amin;           /*¿ÅÁ£µÈЧԲ±íÃæ»ý*/
        double Rs;
        double tf;
        double d_p;             /*Ö±¾¶*/
        double a_p;              /**/
        double n_p;              /*ÊýÁ¿ */
        double d_v;
        double v_a;
        double J;
        real source;
        real Y_1 = C_YI(c,t,1);
        m_0        =        C_UDSI(c,t,0);
        m_1        =        C_UDSI(c,t,1);
        m_2        =        C_UDSI(c,t,2);
        A         = C_UDSI(c,t,3);
        d_p = 6.0*m_1/A;
        a_p = pi*pow((6*m_1/A),2.0);
        n_p = (1./(36*pi))*((pow(A,3.0))/(pow(m_1,2.)*m_0));


        v_a=m_1/m_0;    /* solve for v_a */

        d_v=pow(6.0*(v_a/2.0)/pi,1./3.);  /*v_a is Unknown number*/

        tf=k0*pow(d_p,m)*(C_T(c,t)/T)*exp((EA/R_g)*(1./C_T(c,t)-1./T));

        Amin=pow(pi*m_0,1./3.)*pow(6.0*m_1,2./3.);

        if(n_p<2.0)
                Rs=(A-Amin)/(tf*(d_v));
        else
        {
                Rs=(n_p-1.0)*(0.41*a_p/(tf*d_p));
        }

        kg=3.96e5*exp(-8479.7/C_T(c,t));

        J=kg*Y_1*Nav;

        source=J*a_p0-Rs;
        dS[eqn]=0;

        return source;
}



DEFINE_SOURCE(TTIP_source,c,t,dS,eqn)
{


        real x[ND_ND];
        real w_1,w_2;
        real Y_1=C_YI(c,t,1);
        kg=3.96e5*exp(-8479.7/C_T(c,t));
        ks=1e9*exp(-8479.7/C_T(c,t));

        w_1=-(kg+ks*A)*Y_1;

        dS[eqn]=0;

        return w_1;
}


DEFINE_SOURCE(TiO2_source,c,t,dS,eqn)
{



        real x[ND_ND];
        real w_1,w_2;
        real Y_1=C_YI(c,t,1);
        kg=3.96e5*exp(-8479.7/C_T(c,t));
        ks=1e9*exp(-8479.7/C_T(c,t));

        w_1=-(kg+ks*A)*Y_1;
        w_2=-w_1;

        dS[eqn]=0;

        return w_2;
}
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