NOMENCLATURE [Pa·s] Liquid viscosity µL [m2/s] Liquid kinematic viscosity letters νL [kg/m3] Density ρ [m2] Cell lateral surface Ah, Av [Pa·m] Surface tension σ [J/(kg·K)] Specific heat of liquid cL [-] Contact angle φ [-] Dimensionless factor f Subscripts [m/s2] Gravity acceleration g Activation act [W/(m2K)] h Air air Average av Heat transfer coefficient Bubble [W/(m2K)] b HTC Bubble departure bd Contact area Heat transfer coefficient c ca [J/kg] Latent heat of evaporation Hfg Cavity cav [-] Numerical identifier i, j, k Contact line CL conductivity k Dome of the bubble D [Pa] Pressure p Decreasing decr [W/m2] Heat flux q” Effective eff [W/m3] Volumetric heat source qvol Enhancement enh [J] Heat contributions Q Equivalent eq [m] Bubble radius r Growth [m] Distance g S Heater substrate H [s] Time t Generic site [K] Temperature i, j, k T Initial value in [m3] Volume V Liquid [m] Cartesian coordinates L x, y, z Mesh m [m] Radial coordinate xr Maximum max [m] Mesh width wxy, ML Greek letters Natural convection NC [m2/s] Thermal diffusivity α Nucleation site NS [1/K] Volumetric thermal γvol Shape of the bubble S expansion coefficient Saturation sat [m] Thickness δ Scaled scal [Pa] Pressure drop Δp Sensor SEN [s] Time step Δt Total tot [K] Superheat ΔT Wall W [m] Thickness of the layer Δz Vapour V
NOMENCLATURE letters Ah, Av [m2] Cell lateral surface cL [J/(kg·K)] Specific heat of liquid f [-] Dimensionless factor g [m/s2] Gravity acceleration h [W/(m2K)] Heat transfer coefficient HTC [W/(m2K)] Heat transfer coefficient Hfg [J/kg] Latent heat of evaporation i, j, k [-] Numerical identifier k conductivity p [Pa] Pressure q” [W/m2] Heat flux qvol [W/m3] Volumetric heat source Q [J] Heat contributions r [m] Bubble radius S [m] Distance t [s] Time T [K] Temperature V [m3] Volume x, y, z [m] Cartesian coordinates xr [m] Radial coordinate wxy, [m] Mesh width Greek letters α [m2/s] Thermal diffusivity γvol [1/K] Volumetric thermal expansion coefficient δ [m] Thickness Δp [Pa] Pressure drop Δt [s] Time step ΔT [K] Superheat Δz [m] Thickness of the layer µL [Pa·s] Liquid viscosity νL [m2/s] Liquid kinematic viscosity ρ [kg/m3] Density σ [Pa·m] Surface tension φ [-] Contact angle Subscripts act Activation air Air av Average b Bubble bd Bubble departure c Contact area ca cav Cavity CL Contact line D Dome of the bubble decr Decreasing eff Effective enh Enhancement eq Equivalent g Growth H Heater substrate i, j, k Generic site in Initial value L Liquid m Mesh max Maximum ML NC Natural convection NS Nucleation site S Shape of the bubble sat Saturation scal Scaled SEN Sensor tot Total W Wall V Vapour
Numerical_Investigation_on_Nucleate_Boiling_IJHMT_27_5_12.docx