Nusselt Number

Written by Jerry Ratzlaff on . Posted in Dimensionless Numbers

Nusselt Number

Nusselt number ( \(Nu\) ) (dimensionless number) is a ratio of convective heat transfer to conductive heat across a boundary.

Nusselt Number FORMULA

\(\large{ Nu=\frac{h  l}{k}   }\)         

Where:

\(\large{ Nu }\) = Nusselt number

\(\large{ h }\) = heat transfer coefficient

\(\large{ l }\) = characteristic length

\(\large{ k }\) = thermal conductivity

Solve for:

\(\large{ h=\frac{ Nu k }{ l  }   }\)

\(\large{ l=\frac{ Nu k }{ h  }    }\)

\(\large{ k=\frac{ h l }{  Nu  }    }\)

 

Tags: Equations for Temperature