$SB1-X5.226 þ Function CFFE15(Re,Pr) A=Re*Pr If (A<=2) Then CALL ERROR ('No cumple condiciones de aplicación (Re*Pr<=2).Comprobar Variable Info en el menú Options',A) CFFE15=0.3+((0.62*Re^(1/2)*Pr^(1/3))/((1+(0.4/Pr)^(2/3))^(1/4)))*(1+(Re/282000)^(5/8))^(4/5) End