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求解:当UDF在fluent里面编译的时候出现如下错误,..\..\src\density.c(16) : error C2063: 'sqrt' : not a function
..\..\src\density.c(29) : error C2063: 'pow' : not a function,这个问题如何解决呢!程序如下
#include "udf.h"
#define TC 305.25
#define PC 7380000
#define W 0.225
#define R 8.314
DEFINE_PROPERTY(cell_density, cell, thread)
{
real dd;
real temp = C_T(cell, thread);
real pres = C_P(cell, thread);
real tr,k,a1,a2,a,b,a3,a4,a5,a6,b1,b2,b3,sqrt,pow,m1,m2,x;
tr = temp/TC;
k = 0.37464+1.54226*W-0.26992*W*W;
a1 = (1+k*(1-sqrt(tr)))*(1+k*(1-sqrt(tr)));
a2 = 0.45724*R*R*TC*TC/PC;
a = a1*a2;
b=0.0778*R*TC/PC;
a3=pres;
a4=pres*b-R*temp;
a5=a-3*pres*b*b-2*R*temp*b;
a6=pres*b*b*b+R*temp*b*b-a*b;
b1 = a4*a4-3*a3*a5;
b2 = a4*a5-9*a3*a6;
b3 = a5*a5-3*a4*a6;
m1 = b1*a4+3*a3*(-b2+sqrt(b2*b2-4*b1*b3))/2;
m2 = b1*a4+3*a3*(-b2-sqrt(b2*b2-4*b1*b3))/2;
x = (-a4-(pow(m1,1/3.)+pow(m2,1/3.)))/(3*a3);
dd =1000*x/44;
return dd;
} |