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#include "udf.h" #define TSTART 0.0 #define d 0.00085 #define pi 3.14 #define a 3e-7 #define m0 20 #define R 0.0005 #define c 0.1 #define u 1.256e-6 DEFINE_DPM_BODY_FORCE(particle_body_force, p, i) { real VCP,cc,m,z0,r,x,y,z,bforce; if(P_TIME(p)>=TSTART) { x=P_POS(p)[0];/¿ÅÁ£ÔÚXÖáÉϵÄ×ø±ê y=P_POS(p)[1];/¿ÅÁ£ÔÚYÖáÉϵÄ×ø±ê z=P_POS(p)[2];/¿ÅÁ£ÔÚZÖáÉϵÄ×ø±ê VCP=4.0*pi*a*a*a/3.0;/¿ÅÁ£µÄÌå»ý cc=c/(3+c); m=pow(m0,2); z0=z+R+d; r=sqrt(x*x+y*y+z0*z0); if(i==0) bforce=-9.0*u*cc*VCP*m*x*(4*z0*z0+r*r)/(16*pi*pi*(pow(r,10)));/X·½ÏòµÄÌå»ýÁ¦ else if(i==1) bforce=-9.0*u*cc*VCP*m*y*(4*z0*z0+r*r)/(16*pi*pi*(pow(r,10)));/Y·½ÏòµÄÌå»ýÁ¦ else if(i==2) bforce=-9.0*u*cc*VCP*m*(4*z0*z0*z0)/(16*pi*pi*(pow(r,10)));/Z·½ÏòµÄÌå»ýÁ¦ } else bforce=0.0; /* an acceleration should be returned */ return (bforce/P_MASS(p)); } [ Last edited by ÍõÖÜÅô on 2014-1-6 at 21:17 ] |
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