Summary

This article contains formulae and tabulated data for the properties of air as a function of temperature.

Definitions

:Density (kg/m3)
:Dynamic Viscosity (kg/m.s)
:Specific Heat (J/kg.K)
:Thermal Conductivity (W/m.K)
:Temperature (K)

Air at a Pressure of 1 atm

Functions

The functions below provide a means to evaluate the properties of air as a function of temperature. They were formulated by preforming regression analysis on the tabulated data presented in section 2.2.

PropertyEquationMaximum Error %
Density

0.5
Specific Heat

1.8
Thermal Conductivity

6.5
Dynamic Viscosity

9.9


Tabulated Data

Presented below is a table of air properties as a function of temperature at a pressure of 1 atm.

Temperature Density Specific Heat Thermal Conductivity Dynamic Viscosity Expansion Coefficient
K kg/m3 J/(kg.K) W/(m.K) kg/(m.s) K-1
2001.76610030.01811.340E-53.998E-3
2501.41310030.02231.610E-54.996E-3
2801.27110040.02461.750E-53.724E-3
2901.22410050.02531.800E-53.840E-3
2981.18610050.02591.840E-54.005E-3
3001.17710050.02611.850E-53.823E-3
3051.161005.50.026451.875E-52.931E-3
3101.14310060.02681.900E-52.975E-3
3151.126510060.027151.920E-52.929E-3
3201.1110060.02751.940E-52.973E-3
3251.0931006.50.02791.965E-53.111E-3
3301.07610070.02831.990E-53.160E-3
3351.059510070.028652.010E-53.115E-3
3401.04310070.0292.030E-53.164E-3
3451.0261007.50.029352.055E-53.314E-3
3501.00910080.02972.080E-53.370E-3
3550.99641008.50.030042.101E-52.529E-3
3600.983810090.030382.122E-52.561E-3
3650.97121009.50.030722.143E-52.595E-3
3700.958610100.031062.164E-52.629E-3
3750.9461010.50.03142.185E-52.664E-3
3800.933410110.031742.206E-52.700E-3
3850.92081011.50.032082.227E-52.737E-3
3900.908210120.032422.248E-52.775E-3
3950.89561012.50.032762.269E-52.814E-3
4000.88310130.03312.290E-52.854E-3
4500.78510200.03632.490E-52.497E-3
5000.70610290.03952.680E-52.238E-3
5500.64210390.04262.860E-51.994E-3
6000.58910510.04563.030E-51.800E-3
7000.50410750.05133.350E-51.687E-3
8000.44110990.05693.640E-51.429E-3
9000.39211200.06253.920E-51.250E-3
10000.35311410.06724.180E-51.105E-3
12000.29411750.07594.650E-51.003E-3
14000.25212010.08355.090E-58.333E-4
16000.22112400.09045.490E-57.014E-4
18000.19612760.0975.870E-56.378E-4
20000.17713270.10326.230E-55.367E-4