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#include "udf.h"
#include "dpm.h"
#include "surf.h"
#include "math.h"
DEFINE_DPM_HEAT_MASS(multiabs,p,Cp,hgas,hvap,cvap_surf,dydt,dzdt)
{
cell_t c=P_CELL(p); /* cell and thread*/Õâ¾äÓÐÎÊÌâô
Thread *t=P_CELL_THREAD(p);/* where the particle is in*/Õâ¾äÓÐÎÊÌâô

real Tp=P_T(p);/* particle temperature*/
real Tg=C_T(c,t);
real mp=P_MASS(p);/* particle mass*/Õâ¾äÓÐÎÊÌâô
real Dp=P_DIAM(p);/* particle diameter*/
real Ap=3.14*Dp*Dp;/*particle surface*/

real x_vel_g,x_vel_p,y_vel_g,y_vel_p,abs_v,slip_x,slip_y,reyp,rho_g,rho_p,mu_g,YI,pg,vol_c,D,Sc,Sh,kg,p_so2,pe_so2,Ns,mp_dot;

x_vel_g=C_U(c,t)+1.e-8;
y_vel_g=C_V(c,t)+1.e-8;
x_vel_p=P_VEL(p)[0];
y_vel_p=P_VEL(p)[1];
slip_x=x_vel_g-x_vel_p;
slip_y=y_vel_g-y_vel_p;

rho_g=C_R(c,t)+1.e-8;
rho_p=2.716;
mu_g=C_MU_T(c,t)+1.e-8;
YI=C_YI(c,t,0);
pg=C_P(c,t)+1.e-8;
vol_c=C_VOLUME(c,t)+1.e-8;

/*compute slip*/
abs_v=sqrt(slip_x*slip_x+slip_y*slip_y);

/*compute Reynold's number*/
reyp=rho_g*abs_v*Dp/mu_g;
/* diffusion coefficient*/
D=1.e-7*pow(Tp,1.75)*pow(1.0/29+1.0/64,0.5)/(pg*pow(pow(41.8,1./3)+pow(20.1,1./3),2.)+1.e-8);
/* Schmidt number*/
Sc=mu_g/(rho_g*D+1.e-8);
Sh=2.+0.55*pow(reyp,0.5)*pow(Sc,1./3);
kg=Sh*D/(Dp*8.314*Tp+1.e-8);/*solve kg*/

p_so2=rho_g/(rho_p+1.e-8)*YI*pg;
pe_so2=103.9951*exp(-7.5778*Tg);

Ns=kg/(Tg*8.314+1.e-8)*(p_so2-pe_so2);


dydt[1]-=mp_dot;ÕâÀïµÄ1´ø±íʲô
dzdt->species[0]+=mp_dot;ÕâÀïµÄ0´ú±íʲô

}
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