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December 11, 2007, 08:20 |
parse error while interpreting udf
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#1 |
Guest
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Hello,
I need some help. I've been trying to interpret my udf calculating drag force. I'm running an Euler-Euler simulation of elongated granular bodies. This is my first udf and I'm not entirely familiar with the language. I'm getting several parse error when interpreting, which I have noted in the udf as comments. I've also tried compiling the udf but i only get error:Open_udf_library: The system cannot find the file specified. I have the udf in the same folder as the casefile and when creating the library the udf is copied into the src-folder in the library. Can someone please try to interpret or compile my udf and help me. This is my udf: # include "udf.h" # include "mem.h" # define DCYL 0.0002; # define L 0.010; # define N 10; # define DREF 78e-6; # define PI 3.141592653589; DEFINE_EXCHANGE_PROPERTY(drag_45, cell, mix_thread, s_col, f_col) { Thread *thread_v, *thread_f; real uxf; real uyf; real uzf; real uxv; real uyv; real uzv; real slip_v; real rho_v; real rho_f; real mu_v; double cos_alpha; double sin_alpha; double alfa; double redn; double redp; double cdn; double cf; double cdfiber; real k; real void_v; real void_f; real fn; real fp; real fd; alfa=45; /* find the threads for the gas (primary) */ /* and solids (secondary phases) */ thread_v = THREAD_SUB_THREAD(mix_thread, f_col); /* liquid phase */ thread_f = THREAD_SUB_THREAD(mix_thread, s_col); /* fiber phase*/ /* find phase velocities and properties*/ uxf = C_U(cell, thread_f); uyf = C_V(cell, thread_f); uzf = C_W(cell, thread_f); uxv = C_U(cell, thread_v); uyv = C_V(cell, thread_v); uzv = C_W(cell, thread_v); slip_v = SQR((uxv-uxf)*(uxv-uxf) +(uyv-uyf)*(uyv-uyf)+(uzv-uzf)*(uzv-uzf)); if (slip_v < 1e-12) { slip_v = 1e-12; } else { } rho_v = C_R(cell, thread_v); rho_f = C_R(cell, thread_f); mu_v = C_MU_L(cell, thread_v) void_v = C_VOF(cell, thread_v); /* Vol frac water*//*parse error*/ void_f = 1-void_v; cos_alpha= cos ( alfa); sin_alpha= sin (alfa); /*compute reynoldsnumber*/ redn=rho_v*slip_v*sin_alpha*DCYL/mu_v; /*normal to fiber*/ /*parse error*/ redp=rho_v*slip_v*cos_alpha*DCYL/mu_v; /*parallell to fiber*/ /*parse error*/ if (redn<1e-12) { redn=1e-12; } if (redp<1e-12) { redp=1e-12; } /* compute dragforce coeff in normal direction*/ cdn=6.96*(1/( pow ( redn, 0.440))* pow ( DCYL/DREF, 0.404)); /*parse error*/ cf=0.78*1/(pow (redp,0.61)); cdfiber=(8/3)*(cf*cos_alpha*cos_alpha*cos_alpha+(cdn/PI)sin_alpha*sin_alpha*sin_alpha); /*parse error*/ if (void_f<1e-12) { void_f=1e-12; } fn=1/2*rho_v*slip_v*slip_v*sin_alpha*sin_alpha*DCYL*L*c dn; /*parse error*/ fp=1/2*rho_v*slip_v*slip_v*cos_alpha*cos_alpha*PI*DCYL* L*cf; fd=fp*cos_alpha+fn*sin_alpha; np=4*void_f/(PI*DCYL*L); K=fd*np/slip_v; return K; } Sincerely, Kristin |
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December 11, 2007, 09:27 |
Re: parse error while interpreting udf
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#2 |
Guest
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Hi,
your code contained several minor syntax errors which I corrected and commented below. Now it compiles just fine. Online-tutorials on the language C can help you with the basics. Greetings szz # include "udf.h" # include "mem.h" # define DCYL 0.0002 /* no semicolon in preprocessor declaration*/ # define L 0.010 # define N 10 # define DREF 78e-6 # define PI 3.141592653589 DEFINE_EXCHANGE_PROPERTY(drag_45, cell, mix_thread, s_col, f_col) { Thread *thread_v, *thread_f; real uxf; real uyf; real uzf; real uxv; real uyv; real uzv; real slip_v; real rho_v; real rho_f; real mu_v; real np; // added real K; // added double cos_alpha; double sin_alpha; double alfa; double redn; double redp; double cdn; double cf; double cdfiber; real k; real void_v; real void_f; real fn; real fp; real fd; alfa=45; /* find the threads for the gas (primary) */ /* and solids (secondary phases) */ thread_v = THREAD_SUB_THREAD(mix_thread, f_col); /* liquid phase */ thread_f = THREAD_SUB_THREAD(mix_thread, s_col); /* fiber phase*/ /* find phase velocities and properties*/ uxf = C_U(cell, thread_f); uyf = C_V(cell, thread_f); uzf = C_W(cell, thread_f); uxv = C_U(cell, thread_v); uyv = C_V(cell, thread_v); uzv = C_W(cell, thread_v); slip_v = SQR((uxv-uxf)*(uxv-uxf) +(uyv-uyf)*(uyv-uyf)+(uzv-uzf)*(uzv-uzf)); if (slip_v < 1e-12) { slip_v = 1e-12; } else { } rho_v = C_R(cell, thread_v); rho_f = C_R(cell, thread_f); mu_v = C_MU_L(cell, thread_v); // semicolon added void_v = C_VOF(cell, thread_v); /* Vol frac water*//*parse error*/ void_f = 1-void_v; cos_alpha= cos ( alfa); sin_alpha= sin (alfa); /*compute reynoldsnumber*/ redn=rho_v*slip_v*sin_alpha*DCYL/mu_v; /*normal to fiber*/ /*parse error*/ redp=rho_v*slip_v*cos_alpha*DCYL/mu_v; /*parallell to fiber*/ /*parse error*/ if (redn<1e-12) { redn=1e-12; } if (redp<1e-12) { redp=1e-12; } /* compute dragforce coeff in normal direction*/ cdn=6.96*(1/( pow ( redn, 0.440))* pow ( DCYL/DREF, 0.404)); /*parse error*/ cf=0.78*1/(pow (redp,0.61)); cdfiber=(8/3)*(cf*cos_alpha*cos_alpha*cos_alpha+(cdn/PI)*sin_alpha*sin_alpha*sin_alpha); /* times (*) added before sin */ if (void_f<1e-12) { void_f=1e-12; } fn=1/2*rho_v*slip_v*slip_v*sin_alpha*sin_alpha*DCYL*L*c dn; /*parse error*/ fp=1/2*rho_v*slip_v*slip_v*cos_alpha*cos_alpha*PI*DCYL* L*cf; fd=fp*cos_alpha+fn*sin_alpha; np=4*void_f/(PI*DCYL*L); K=fd*np/slip_v; return K; } |
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December 11, 2007, 10:49 |
Re: parse error while interpreting udf
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#3 |
Guest
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Thanks a million
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March 15, 2012, 07:43 |
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#4 |
New Member
karthik
Join Date: Oct 2010
Posts: 14
Rep Power: 16 |
Dear all, I am getting the same parse error when I try to interpret. The code is quite simple, and I keep getting it on the bottom line of code. I cant understand why, can someone please help.
Thanks, have attached the code below /*UDF for adding sink term for H2 consumption based on current density */ #include "udf.h" DEFINE_SOURCE(sink,c,t,dS,eqn) { real i = 0.4; /* Amps/m2 */ real F = 96485.0; /* Faradays constant (C/mol) */ real M_H2 = 2.0; /* Molecular weight of Hydrogen */ real sink; real area = 0.001*0.001; real volume = C_VOLUME(c,t); /*Thread *t; cell_t c;*/ //sink = -(((i/area)/volume)/(2.0*F))*M_H2; sink = 0.0; return sink } |
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