Cableizer
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Air velocity

For cables in tunnels, this is the velocity of the air inside the tunnel.

For cables in troughs, this is the velocity of the air above ground (optional parameter).

Symbol
$V_{air}$
Unit
m/s
Used in
$C_{av}$
Heat capacity of the air flow [W/K]
$\Delta \theta_{sun}$
Temperature rise by solar radiation [K]
$h_{conv,sa}$
Convection heat transfer coefficient, surface to air [W/(K.m$^2$)]
$H_{ts}$
Parameter H depending on air velocity
$\mathrm{Re}_{air}$
Reynolds number for air
$T_{tr}$
Thermal resistance of trough [K.m/W]
$W_{a,L}$
Heat removed by air at outlet [W/m]