# Convection heat transfer, object to gas

Radiation heat transfer from cable surface to gas in duct used for riser/J-tube.

Symbol
$W_{conv_{og}}$
Unit
W/m
Formulae
$D_{o} F_{eq} h_{conv_{og}} \pi \left(\theta_{e} - \theta_{gas}\right)$
Related
$D_{o}$
$\theta_{e}$
$\theta_{gas}$
Used in
$T_{4i}$