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#include"udf.h"
#include"mem.h"
#define MW_N2 28.0
#define MW_C2H4 28
#define Q_N2 0
#define Q_C2H4 0.0000002435
#define P_outer  2160000
#define P_inner  120000
#define feed_domain 17
#define perment_domain 18

real molefrac( real frac, real molarone, real molartwo)
{
        real a = frac / molarone ;
        real b = (1-frac)/molartwo ;
        return a/(a+b) ;
}
DEFINE_ADJUST(filter_adjust, domain)
{
        cell_t c1, c0;
        Thread*  wall_thread;
        Thread*  wall_shadow_thread ;
        Thread*  t0;
        Thread*t1;
        face_t wall = 27;
        face_t wall_shadow = 2;
        real A[ND_ND] ;
        real x_C2H4_outer, x_N2_outer, x_C2H4_inner, x_N2_inner, At, flux_C2H4,  flux_N2, tot_flux ;
        int  memb_id = 17 ;
        wall_thread= Lookup_Thread(domain,wall);
         tot_flux = 0 ;
        begin_f_loop (wall, wall_thread)
        {
                c0  = F_C0(wall,wall_thread);
                wall_shadow_thread = THREAD_SHADOW(wall_thread);
                wall_shadow = F_SHADOW(wall,wall_thread);
                c1 = F_C0(wall_shadow,wall_shadow_thread);
                t0 = F_C0_THREAD(wall,wall_thread);
                t1 =THREAD_T0(wall_shadow_thread);
                x_C2H4_outer = molefrac(C_YI(c0, t0, 0), MW_C2H4, MW_N2);
                x_N2_outer = 1.0 - x_C2H4_outer;
                 x_C2H4_inner = molefrac(C_YI(c1, t1, 0), MW_C2H4, MW_N2);
                 x_N2_inner = 1.0 - x_C2H4_inner;
                F_AREA(A,wall, wall_thread);
                 At = NV_MAG(A);
                 flux_C2H4 = Q_C2H4 * ( x_C2H4_outer * P_outer - x_C2H4_inner * P_inner);
                 flux_N2 = Q_N2 * ( x_N2_outer * P_outer - x_N2_inner * P_inner);
                  tot_flux = tot_flux + MW_C2H4*flux_C2H4*At + MW_N2*flux_N2*At;
                C_UDMI(c0, t0, 0) = -(MW_C2H4*flux_C2H4)*At/C_VOLUME(c0,t0);
                C_UDMI(c1, t1, 1) =  (MW_C2H4*flux_C2H4)*At/C_VOLUME(c1,t1);
                C_UDMI(c0, t0, 2) = -(MW_N2*flux_N2)*At/C_VOLUME(c0,t0);
                C_UDMI(c1, t1, 3) =  (MW_N2*flux_N2)*At/C_VOLUME(c1,t1);
        }
        end_f_loop (wall,wall_thread)
}
DEFINE_SOURCE(gas1, c, t, dS, eqn)
{  
        Thread*  tf;
        int n ;
        real source=0.0;
        Domain *domain = Get_Domain(feed_domain);
        face_t wall = 27;
        Thread* wall_thread=Lookup_Thread(domain,wall);
        Thread* wall_shadow_thread = THREAD_SHADOW(wall_thread);
        c_face_loop( c, t, n)  
        {tf = C_FACE_THREAD(c,t,n);
                if(tf==wall_thread)
                        return source=C_UDMI(c, t, 0);       
        }
        return source;
}
DEFINE_SOURCE(gas2, c, t, dS, eqn)
{  
        Thread*  tf;
        int n ;
        real source=0.0;
        Domain *domain = Get_Domain(perment_domain);
        face_t wall = 27;
        Thread* wall_thread=Lookup_Thread(domain,wall);
        Thread* wall_shadow_thread = THREAD_SHADOW(wall_thread);
        c_face_loop( c, t, n)  
        {tf = C_FACE_THREAD(c,t,n);
                if(tf==wall_shadow_thread)
                        return source=C_UDMI(c,t,1);
        }
        return source;
}
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