Air temperature in tunnel increase

Fictitious increase of ambient temperature to account for the ventilation in a tunnel.

Symbol
$\Delta \theta_{0t}$
Unit
K
Formulae
$\frac{\left(\theta_{at,0}-\theta_a\right) \left(T_t+T_e\right)}{T_a+T_t+T_e} e^{\frac{-L_T}{L_0}}$
Used in