Symbols and acronyms
AWJ	Abrasive waterjet
$C,L$	Constants
CAM	Computer Aided Manufacturing
CFD	Computational Fluid Dynamics
$c_{\mathrm{c}}$	Contraction coefficient
$c_{\mathrm{d}}$	Discharge coefficient
$c_{\mathrm{v}}$	Velocity coefficient
$d_{\mathrm{n}}$	Orifice diameter
$d_{\mathrm{m}}$	Focusing tube diameter
EDM	Electrical Discharge Machining
f	Feed rate
FEM	Finite Elements Method
IIoT	Industrial Internet of Things
LDV	Laser Doppler Velocimetry
microAWJ	Micro Abrasive Waterjet
microEDM	Micro Electrical Discharge Machining
microWEDM	Micro Wire Electrical Discharge Machining
${\dot{m}}_{\mathrm{a}}$	Abrasive mass flow rate
${\dot{m}}_{\mathrm{w}}$	Water mass flow rate
Oh	Ohnesorge number
$p$	Water pressure
$P_{\mathrm{part}}$	Kinetic power of the abrasive particles (for the sake of brevity jet power)
$P_{\mathrm{part},\mathrm{spec}}$	Specific kinetic power of the abrasive particles (for the sake of brevity jet specific power)
$Q_{\mathrm{w}}$	Water volume flow rate
Re L	Reynolds number of liquid
$r_{\mathrm{d}}$	Abrasive loading ratio
$S_0$	Nominal cross-sectional area of the orifice
$S_{\mathrm{j}}$	Jet cross-sectional area at the vena contracta
$v_{\mathrm{abr}}$	Abrasive waterjet velocity
$v_{\mathrm{j}}$	Real jet velocity (or pure waterjet velocity)
$v_{\mathrm{th}}$	Theoretical velocity (Bernoulli)
$v_{\mathrm{th},\mathrm{c}}$	Theoretical compressible velocity
WJ	Waterjet
W top	Kerf width at the top
W bot	Kerf width at the bottom
$\rho$	Water density
$\psi$	Compressibility coefficient
Subscripts
$0$	Upstream section of the orifice (Figure 4)
$1$	Downstream section of the orifice (Figure 4)