Aero formulas

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Resources on physics related to aerodynamics

The List of elementary physics formulae on wikipedia is useful.

List of variables

Variable Meaning Unit (SI)
γ (gamma) Surface tension N.m-1 (Newton per meter)
μ (mu) or η (eta) Viscosity Pa·s (Pascal second) or P (Poise, 1 Poise is 0.1 Pa.s)
H Enthalpy: energy of a thermodynamic system. J (Joule)
heat_vap.png or L Vaporization heat or Latent heat of vaporization: energy required to vaporize a mole of liquid at a given temperature. J.mol-1 (Joule per mole)
Q Amount of Heat J (Joule)
T Temperature K (Kelvin)
V Volume m3 (cubic meter)
n Quantity of matter mol (mole)
p Pressure Pa (Pascal)

List of constants

Constant Meaning Value Unit (SI)
NA or N Avogadro constant, number of atoms or molecules in a mole. 6.02214129.1023 mol-1
R ideal gas constant 8.3144621 J.K−1.mol−1
kB or k Boltzmann constant, gas constant R divided by Avogadro number. 1.3806488.10-23 J.K-1

List of equations

Equation Name Meaning
pvnrtk.png Ideal gas equation Relation between properties of an ideal gas (state equation). k is kB.
clausius-clapeyron.png Clausius-Clapeyron relation Relation between the pressure, latent heat of vaporization and temperature of a vapour at two temperatures (approximation, at low temperatures).
Qdefinition.png Definition of Heat for an ideal gas. The heat required to change the temperature of a system from an initial temperature T0, to a final temperature, Tf.
QeqmL.png Heat at state change for an ideal gas. The heat required to change the state of a some matter, L being the latent heat.