Cableizer ®

Biot number ground

Symbol
$\mathrm{Bi}_g$
Formulas
$\frac{h_{amb} D_{ext}}{2k_{4}}$Ovuworie
$\frac{h_{amb} D_{ref}}{2k_{4}}$OTC 23033
Related
$D_{ext}$
Diameter external [m]
$D_{ref}$
Diameter OHTC reference [m]
$h_{amb}$
Pseudo film coefficient of ambient fluid at ground level [W/(K.m$^2$)]
$k_{4}$
Thermal conductivity soil [W/(m.K)]
Used in
$h_{buried}$
Heat transfer coefficient pipe fully buried [W/(K.m$^2$)]
$h_{ground}$
Heat transfer coefficient part of pipe in contact with ground [W/(K.m$^2$)]
$K_{par}$
Constant $K_{par}$ (Ovuworie)