# Nusselt number

(Difference between revisions)
 Revision as of 08:37, 5 December 2005 (view source)← Older edit Latest revision as of 09:45, 17 December 2008 (view source)Peter (Talk | contribs) m (Reverted edits by LamonEroua (Talk) to last version by Sachinshendge) (5 intermediate revisions not shown) Line 1: Line 1: - =='''Nusselt number'''== + Nusselt number is dimensionless number which is useful for convective heat transfer calculations. heat transfer can be expressed in terms of Nusselt number. It can be defined as follows: - Nusselt number is dimensionless number which is useful for convective heat transfer calculations. heat transfer can be expressed in terms of Nusselt number. it can be defied as follows: + :$Nu = \frac{h*l}{k}$ - + - '''$Nu = h*l/k$''' + Where Where

## Latest revision as of 09:45, 17 December 2008

Nusselt number is dimensionless number which is useful for convective heat transfer calculations. heat transfer can be expressed in terms of Nusselt number. It can be defined as follows:

$Nu = \frac{h*l}{k}$

Where

$Nu = \mbox{Nusselt number}$
$h = \mbox{Convection heat-transfer coefficient (constant of proportionality ) (W/m2 K)}$
$l = \mbox{Characteristic dimension of th esolid object (m)}$
$k = \mbox{Thermal conductivity of the solid (W/m k)}$