Graetz Number

Written by Jerry Ratzlaff on . Posted in Dimensionless Numbers

Graetz Number

Graetz number ( \(Gz\) ) (dimensionless number) characterizes laminar flow with heat transfer in a conduit.    

Graetz Number formula

\(Gz = \frac {d}{l} Re Pr \)          \( Graetz \; number  \;=\;   \frac { diameter }  {  length } \; Reynolds \; number  \;\;x\;\;  Prandtl \; number  \)

Where:

\(Gz \) = Graetz number

\(d\) = diameter

\(l\) = length

\(Re\) = Reynolds number

\(Pr\) = Prandtl number

 

Tags: Equations for Heat Transfer Equations for Heat