Gases (5)

Variable Description

λMean free path

ρFlow density

ρ0

Stagnation density

AFlow area

At

Throat area

dMolecular diameter

kSpecific heat ratio

MMach number

mMass

MW

Molecular weight

nNumber of moles, or

Polytropic constant (Polytropic Processes)

PPressure, or Flow pressure (Isentropic Flow)

P0

Stagnation pressure

Pc

Pseudocritical pressure

Pi, Pf

Initial and final pressures

TTemperature, or Flow temperature (Isentropic Flow)

T0

Stagnation temperature

Tc

Pseudocritical temperature

Ti, Tf

Initial and final temperature

VVolume

Vi, Vf

Initial and final volumes

vrms

Root-mean-square (rms) velocity

WWork

References:1, 3.

Ideal Gas Law (5, 1)

Equations:

P ⋅ V = n ⋅ R ⋅ T

m = n ⋅ MW

Equation Reference 5-25