Nusselt Number & h

Compute heat-transfer coefficient h from Nusselt-number correlations.

visual calculatorHeat Transfer

Read the flow shape before trusting the number.

This page turns a CFD setup into regime, scale, and dominant-effect cues. Adjust the calculator below and compare the moving graphic with the computed result.

input scale

model

check

Nusseltconvectionheat transfer

formula

KaTeX rendered

\begin{aligned}\text{Nu = h L / k}\\[0.35em]\text{h = Nu k / L}\end{aligned}

ASCII source

Nu = h L / k, h = Nu k / L

Re — Reynolds numberPr — Prandtl numberk — thermal conductivity (W/m·K)L — length scale (m)

—

h (W/m²·K)

—

Outside Dittus-Boelter range (Re>10⁴, 0.6<Pr<160)

Nusselt convection heat transfer