[rahulmule797@gmail.com]

I am trying to compile the UDF code as given below...I want to interpolate the property of argon at desired temperature. But after interpreting it shows error at last line of table definition.
*=>Error: Invalid Type Conversion float-> array 2 of double*
Please help me out...



DEFINE_PROPERTY(Argon_density, c,t)

{

double T;

double table[24][2]={ //table of computed density data for Argon at 1bar {5500,8.86E-02},

{6000,8.12E-02},{6500,7.49E-02},{7000,6.96E-02},{7500,6.49E-02},{8000,6.08E-02},

{8500,5.71E-02},{9000,5.38E-02},{9500,5.06E-02},{10000,4.77E-02},{10500,4.48E-02},

{11000,4.19E-02},{11500,3.90E-02},{12000,3.60E-02},{12500,3.30E-02},{13000,3.00E-02},

{13500,2.71E-02},{14000,2.45E-02},{14500,2.21E-02},{15000,2.01E-02},{15500,1.85E-02},

{16000,1.72E-02},{16500,1.62E-02},{17000,1.53E-02},{17500,1.47E-02},{18000,1.41E-02},

{18500,1.36E-02},{19000,1.31E-02},{19500,1.27E-02},{20000,1.23E-02},{20500,1.19E-02},

{21000,1.15E-02},{21500,1.11E-02},{22000,1.07E-02},{22500,1.03E-02},{23000,9.89E-03},

{23500,9.46E-03},{24000,9.02E-03},{24500,8.60E-03},{25000,8.19E-03},{25500,7.80E-03},


};

int n;

double x[2],y[2],rho;

T=C_T(c,t);

for(n = 0; n < TABLESIZE-1; n++){

if((T > table[n][0]) && (T <= table[n+1][0])){

x[0]=table[n][0];

x[1]=table[n][1];

y[0]=table[n+1][0];

y[1]=table[n+1][1];

rho=(y[1]-x[1])/(y[0]-x[0])*(T-x[0])+x[1];
}}

return rho

[AlexanderZ]

as far as I know standard libraries which are available in Fluent, are not suitable for 2D arrays
make 2 separated arrays
or make an object (which is tricky)

best regards