English: | Greek: | ||
D | Diffusion coefficient [m2/s] |
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Volume fraction [unitless] |
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Friction coefficient [kg/(m3 . s)] |
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Mass transfer rate from x to y [kg/(m3 . s)] |
gz | z-component of the gravity vector [m/s2] |
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Capillary pressure difference, Pm - Pl [Pa] |
h | Enthalpy [J/kg] |
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Flow volume fraction in the wick [unitless] |
k | Thermal conductivity [W/(m . K)] |
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Density [kg/m3] |
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Linearization functional |
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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![]() ![]() ![]() |
Time-integrated heat output [J] |
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Related to interphase transfer |
Q![]() ![]() ![]() |
Heat output rate [W] |
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Normal (to the surface) value |
rc | Radius of curvature of the meniscus [m] |
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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 |