A	Area (m2);
F	Force (N);
g	Gravitational acceleration (m/s2);
a, b, a*, b*, c*, l, L	Length (m);
V	volume (m3);
w	velocity (m/s);
v	vertical displacement (m)
$S_{\dot{Q}} , S_{L_z} , S_{\Delta t} , S_{\tau } , S_{{\lambda }_{x steel}} ,S_{\varsigma }$ $S_F , S_L , S_E , S_{E\cdot I_z}, S_v$	scale factor corresponding to the sizes indicated in the index.
Greek symbols
$\rho$	Density (kg/m3);
$\nabla$ ${\pi }_j, j=1, \dots , n$ $\gamma$	Nabla operator; Dimensionless variables; Specific gravity (N/m3).
Subscripts
x, y, z	Directions.