$A_a$	nominal area of the contact region between brake shoe and wheel (m2)
$c$	specific heat capacity (J/(kg K))
$d_{eq}$	nominal wheel outer diameter $d_{eq}=2r_{eq}$ (m)
$f$	coefficient of friction (dimensionless)
$F_c$	contact force (N)
$h$	heat transfer coefficient (W/(m2 K))
$k$	thermal diffusivity (m2/s)
$K$	thermal conductivity (W/(m K))
$m$	braking mass per one wheel (kg)
$M$	braking torque (N m)
$p$	contact pressure (MPa)
$q$	specific friction power (W/m2)
$r$	radial coordinate (m)
$r_{eq}$	equivalent radius of the contact region (m)
$R_w$	equivalent radius of the wheel $R_w=r_{eq}$ (m)
$t$	time (s)
$t_s$	total braking time (s)
$T$	temperature (°C)
$T_a$	ambient temperature (°C)
$T_0$	initial temperature (°C)
$T_{1-3}$	average temperature from $T_1$, $T_2$ and $T_3$ (°C)
$T_{4-6}$	average temperature from $T_4$, $T_5$ and $T_6$ (°C)
$T_1,\hspace{0.17em}{T}_2,\hspace{0.17em}{T}_3$	temperature at specific location inside the wheel (°C)
$T_4,\hspace{0.17em}{T}_5,\hspace{0.17em}{T}_6$	temperature at specific location on the contact surface of the wheel (°C)
$V$	velocity on the equivalent radius of the wheel (vehicle velocity) (m/s)
$V_0$	initial vehicle velocity (m/s)
$z$	axial coordinate (m)
Greek symbols
$\gamma$	heat partition coefficient (dimensionless)
$\mathrm{\Gamma }$	contact region of the brake shoe and wheel (m2)
$\eta$	coverage factor (dimensionless)
$\theta$	circumferential coordinate (rad)
$\rho$	mass density (kg/m3)
$\omega$	angular velocity of the wheel (rad/s)
${\omega }_0$	initial angular velocity of the wheel (rad/s)
${\mathrm{\Omega }}_s$	region within the volume of the brake shoe (m3)
${\mathrm{\Omega }}_w$	region within the volume of the wheel (m3)
Subscripts
$s,\hspace{0.17em}w$	brake shoe, wheel
$E$	experiment