MC	Microchannel
MT	Microtube
man	manifold
$f_f$	Average fanno friction factor
$f_{f,local}$	Local Fanno/Adiabatic friction factor
$\widetilde{f_f}$	Semi local Fanno friction factor
$f_{iso}$	Isothermal friction factor
${\tau }_w$	Wall shear stress
$\rho$	Density of the gas
u	Gas average axial velocity
$D_h$	Hydraluic diamter
$\alpha$	Aspect ratio of MC
$ϵ$	Roughness of MC
$\beta$	Kinetic energy recovery coefficient
$Per$	Wetted perimeter
p	Cross sectional average pressure
$\Delta P$	Minor pressure loss
R	Universal gas constant
T	Cross sectional average temperature
$T_{av}$	Average temperature between two axial locations
$\dot{G}$	mass flow rate per unit area
$c_p$	Specific heat at constant pressure
A	MC cross sectional area
$\dot{m}$	mass flow rate
$\mu$	Kinematic viscosity
$Ma$	Mach number
$\gamma$	Ratio of specific heat
$\Delta P$	Pressure drop
K	Minor loss coefficient
L	MC length
w	MC width
h	MC height
$H_{man}$	Manifold Height
$H_r$	Height of reducer
Subscripts
${}_{in/out}$	MC inlet and outlet
${}_1$	Entrance of inlet manifold
${}_2$	Exit of outlet manifold
${}_{th}$	Theoretical
${}_{atm}$	Atmospheric
${}_{man}$	Manifold