# Thom correlation

## Description

There exist simple fluid-specific correlations for heat transfer coefficient in boiling. The Thom correlation is for the flow of boiling water (subcooled or saturated at pressures up to about 20 MPa) under conditions where the nucleate boiling contribution predominates over forced convection. This correlation is useful for rough estimation of expected temperature difference given the heat flux.

Note that this empirical correlation is specific to the units given.

Related formulas## Variables

Δ_{Tsat} | wall temperature elevation above the saturation temperature (K) (dimensionless) |

q | heat flux (MW/m^2) (dimensionless) |

P | pressure of water (MPa) (dimensionless) |