NOMENCLATURE

English:		Greek:
D	Diffusion coefficient [m2/s]	$\alpha$	Volume fraction [unitless]
$\mathcal {F}$	Friction coefficient [kg/(m3 . s)]	$\Gamma_{{xy}}^{}$	Mass transfer rate from x to y [kg/(m3 . s)]
gz	z-component of the gravity vector [m/s2]	$\Delta$Pcap	Capillary pressure difference, Pm - Pl [Pa]
h	Enthalpy [J/kg]	$\epsilon_{v}^{}$	Flow volume fraction in the wick [unitless]
k	Thermal conductivity [W/(m . K)]	$\rho$	Density [kg/m3]
$\mathcal {L}$$\left(\vphantom{ f }\right.$f$\left.\vphantom{ f }\right)$	Linearization functional	$\sigma$	Liquid surface tension [N/m]
P	Pressure [Pa]	Superscripts:
Qxy	Heat transfer rate from x to y [W/m3]	X	Related to a mass fraction
Q$\scriptsize int$$\left(\vphantom{ t }\right.$t$\left.\vphantom{ t }\right)$	Time-integrated heat output [J]	$\Gamma$	Related to interphase transfer
Q$\scriptsize out$$\left(\vphantom{ t }\right.$t$\left.\vphantom{ t }\right)$	Heat output rate [W]	$\nu$	Normal (to the surface) value
rc	Radius of curvature of the meniscus [m]	$\rho$	Related to a density
R	Gas constant [J/(kg . K)]	Subscripts:
t	Time [s]	g	Working fluid gas value
T	Temperature [K]	l	Liquid value
U	Internal energy [J/kg]	m	Mixture value (gas and noncondensible)
V	Velocity [m/s]	n	Noncondensible value
X	Mass fraction [unitless]	s	Solid value
z	Axial distance [m]	w	Wall value
		x, y	Arbitrary species