changes.mady.by.user Arthur Aslanyan (Nafta College)
Saved on Jun 20, 2020
...
f = \frac{64}{\rm Re} \cdot \Phi
\Phi = \left [ 1+ \frac{\left(\rm Re / 8 \right)^{12} }{ \lefftleft( \Theta_1 + \Theta_2 \right)^{1.5} } \right]^{1/12}
\Theta_1 = \left[ 2.457 \, \ln \left( \left( \frac{7}{\rm Re} \right)^{0.9} + 0.27 \, \frac{\epsilon}{d} \right) \right]^{16}
\Theta_2 = \left( \frac{37530}{\rm Re} \right)^{16}
