Nusselt Number

Written by Jerry Ratzlaff. Posted in Dimensionless Numbers

Nusselt Number is a dimensionless number ratio of convective heat transfer to conductive heat across a boundary.

FORMULA

\(Nu=\frac{h  l}{k}\)

Where:

\(Nu\) = Nusselt Number

\(h\) = heat transfer coefficient

\(l\) = characteristic length

\(k\) = thermal conductivity

Solve for:

\(h=\frac{ Nu k }{ l  }\)

\(l=\frac{ Nu k }{ h  }\)

\(k=\frac{ h l }{  Nu  }\)