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[ÇóÖú] Fluent UDF ÇóÖú

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DEFINE_PROFILE(DFA_outlet,thread,position)
{
        real NV_VEC(A),NV_VEC(FaceVel);
        double Q;
        face_t f;
        int i;
        real t=RP_Get_Real("flow-time";
        real tt;    // define the time in one cycle
        real w=0.8; // period of a cycle
        real p1[100]; // define the pressure after R1
        double R1,R2,C; // define electric modulus
        int TTS; // total time steps
        int h,TS; // time interval and time step

        R1=9.717571*pow(10,8),R2=3.849843*pow(10,9),C=3.712461*pow(10,-10);    // set the values of electric modulus
        TTS=100; // total time steps

        begin_f_loop(f,thread)
        {
                NV_D(FaceVel,=,F_U(f,thread),F_V(f,thread),F_W(f,thread));
                F_AREA(A,f,thread);
                Q=NV_DOT(FaceVel,A);

                //compute the pressure using the explicit Euler method

                h=w/TTS;
                tt=t-floor(t/w)*w;
                TS=floor(tt/h);
                p1[0]=12102.65-Q*R1;
                if(TS=0)
                        F_PROFILE(f,thread,position)=p1[0]+Q*R1;
                else
                        for(i=1;i<=TS;i++)
                                {
                                        p1[TS]=p1[TS-1]+h*(Q-(p1[TS-1]-1333.22)/R2)/C;
                                }
                        F_PROFILE(f,thread,position)=p1[TS]+Q*R1;
        }
        end_f_loop(f,thread)
}

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