Re=10^5:10^5:10^6;C_D = 24./Re + (2.6.*(Re./5))/(1+(Re./5.0).^(1.52))+(0.411*(Re./263000).^(-7.94))./(1+(Re./263000).^(-8))+(0.25*Re./(10^6))/(1+Re./(10^6))
the result above the code is
C_D = 0.4871 0.4629 0.2064 0.1135 0.1017 0.0998 0.0994 0.0993 0.0992 0.0992
In this code, when Re is 10^6, C_D is 0.0992.
But, I calculate Re=10^6 in manual
the result of C_D value is 0.1296
>> Re=10^6Re = 1000000>> C_D = 24./Re + (2.6.*(Re./5))/(1+(Re./5.0).^(1.52))+(0.411*(Re./263000).^(-7.94))./(1+(Re./263000).^(-8))+(0.25*Re./(10^6))/(1+Re./(10^6))C_D = 0.1296
Why this problem happen?
And can I solve this problem?
Best Answer