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{latex}
\large
$$
f = {{0.25} \over {\log \left( {{\varepsilon \over {3.7 \cdot 4 \cdot R_h }} + 5.74 \cdot ({\mathop{\rm Re}\nolimits} ^{ - 1} )^{0.9} } \right)^2 }}
$$
{latex} |