ThermodynamicsのA-Zガイド、熱&アンプ、質量移動、流体工学

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 Quantity Symbol Coherent SI unit
 Absorptivity (radiation) α — Amount of substance N mol Molar flow rate mol/s Molar mass velocity(= N/Ac) mol/m2s Angle Plane α, β, γ, θ, Ø rad Solid ω sr Area Cross-sectional S m2 Surface A m2 Coefficient of cubic expansion (1/v)(∂v/∂T)p β K−1 Concentration Mass (= M/V) c kg/m3 Molar (= N/V) mol/m3 Contact angle θ rad. Density Mass (= M/V) ρ kg/m3 Molar (= N/V) mol/m3 Diameter D m Diffusion coefficient D m2/s Diffusivity δ m2/s Thermal (= λ/ρcp) κ m2/s Dryness fraction (quality) x — Emissivity (radiation) ε — Energy E J = kg m2/s2 Enthalpy (= U + pV) H J = kg m2/s2 Specific, molar h, J/kg, J/mol Of phase change at constant p: Melting hsl, J/kg, J/mol Sublimation hsg, J/kg, J/mol Evaporation hlg, J/kg, J/mol Entropy S J/K = kg m2/s2K Specific, molar s, J/kg K, J/mol K Force F N = kg m/s2 Fraction Mass, of species i xiyi — Mole, of species i — Phase ε — Frequency f Hz, s−1 Frequency circular ω rad/s Gas constant J/mol K Molar (universal) = kg m2/s2· mol K Specific, of species i Ri J/kgK = m2/s2K Gravitational acceleration g m/s2 Gibbs function (H – TS) G J = kg m2/s2 Specific (h – Ts) g J/kg = m2/s2 Molar ( – ) J/mol = Kgm2/s2mol Heat Quantity of Q J = kg m2/s2 Rate W = kg m2/s3 Flux ( /A) W/m2 = kg/s3 Heat capacity c J/K = kg m2/s2 K Specific, at constant volume or cv, cp J/kg K = m2/s2 K pressure Molar at constant volume or , J/mol K pressure = kg m2/s2mol K Ratio cp/cv γ — Heat transfer coefficient α W/m2K = kg/s3K Overall U W/m2K = kg/s3K Internal energy U J = kg m2/s2 Specific u J/kg = m2/s2 Molar J/mol = kg m2/s2mol Joule Thompson coefficient [(δT/δP)h] μJT m2K/N = rns2K/kg Length 1(L) m Diameter d(D) m Radius r(R) rn Breadth b(B) m Height z(Z) m Thickness δ m Liquid film thickness δ m Liquid holdup εL — Mass M kg Flow rate kg/s Mass velocity or mass flux kg/m2s ( /A) Flux of species i kg/m2s Mass transfer coefficient β m/s Molar mass kg/kmol Pressure p Pa = N/m2 = Kg/ms2 Drop δp Pa = N/m2 = kg/ms2 Reflectivity p — Shear stress τ Pa = N/m2 = kg/ms2 Surface tension σ N/m = kgs2 Temperature Absolute T K Difference or interval ΔT K Logarithmic mean difference ΔTLM K Mean temperature difference ΔTM K Thermal conductivity λ W/m K = kg m/s3K Time t s Velocity u m/s Component in Cartesian coordinates x,y,z u,v,w m/s View factor (geometric or Ø12 sr configuration factor) Viscosity Dynamic (absolute) η Pas = N s/m2 = kg/ms Kinematic (= η/ρ) ν m2/s Void fraction εG — Volume V m3 Volumetric flow rate m3/s Specific, molar volume v, m3/kg Work W J = kg m2/s2 Rate (power) W = kg m2/s3 Wavelength λ m Subscripts and Superscripts Solid or saturated solid S (s) Liquid or saturated liquid L(l) Gas or saturated vapor G(g) Change of phase at constant p: Melting SL (sl) Sublimation SG (sg) Evaporation LG (lg) Critical state c Initial o Inlet in, Outlet out, At constant value of property p,v,t. etc Mean – Molar (per unit of amount of ~ substance) Stagnation o Wall W(w)