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UDF for inlet velocity alongwith UDF for properties |
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February 1, 2018, 10:17 |
UDF for inlet velocity alongwith UDF for properties
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Akshayy Tiwari
Join Date: Apr 2017
Location: Allahabad, India
Posts: 2
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Hello,
I want to use velocity UDF alongwith UDF for temperature dependent thermal conductivity and viscosity. For that I've created following UDF: /* UDF for specifying inlet velocity , nanofluid thermal conductivity and viscosity */ #include "udf.h" #define Br 0.1 DEFINE_PROPERTY(cell_conductivity,cell,thread) { real ktc; real temp = C_T(cell,thread); ktc=0.6+38.82*(pow(temp,1.2321)); return ktc; } DEFINE_PROPERTY(cell_viscosity,cell,thread) { real mu; real temp = C_T(cell,thread); mu=-0.155-2.1754*0.01*(pow(temp,-2)); return mu; } DEFINE_PROFILE(inlet_x_velocity,thread,position) { face_t f; real temp = C_T(cell,thread); begin_f_loop(f,thread) { F_PROFILE(f,thread,position) = pow(0.5035*Br*(pow(-0.155-2.1754*0.01*(pow(temp,-2)),-1)),0.5); } end_f_loop(f,thread) } It is showing an Error: line 24:cell: undeclared variable i.e. in real temp = C_T(cell,thread); I'm new in writing UDF and so I can't understand what FLUENT is indicating. I'd be grateful if someone help me by rectifying it. Thanks |
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