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Viscosity of Air, Dynamic and Kinematic

Heat Transfer Engineering
Thermodynamics
Engineering Physics

Viscosity of Air, Dynamic and Kinematic

  • Specific Heat of Air
  • Density of Air
  • Specific Heat of Air
  • Thermal Conductivity of Air
  • Thermal Diffusivity of Air
  • Dynamic Viscosity of Air
  • Kinematic Viscosity of Air
  • Prandtl Number Air

The viscosity of air depends mostly on the temperature. At 15 °C, the viscosity of air is 1.81 × 10-5 kg/(m·s) , 18.1 μPa·s or 1.81 × 10-5 Pa·s .

The kinematic viscosity of air at 15 °C is 1.48 × 10-5 m2 /s or 14.8 cSt. At 25 °C, the viscosity is 18.6 μPa·s and the kinematic viscosity 15.7 cSt.

Viscosity of Air, Dynamic and Kinenatic

Properties of air at 1 atm pressure

Temp
T, °C
Density
Air
ρ, kg/m3
Specific Heat
of Air
cρ, J/kg-K
Thermal
Conductivity
Air
k, W/m-K
Thermal
Diffusivity Air
α, m2/s
Dynamic
Viscosity Air
µ, kg/m-s
Kinematic
Viscosity Air
v, m2/s
Prandtl
Number Air
Pr
- 150
2.866
983
0.01171
4.158 x 10-6
8.636x 10-6
3.013 x 10-6
0.7246
- 100
2.038
966
0.01582
8.036x 10-6
1.189 x 10-5
5.837 x 10-6
0.7263
- 50
1.582
999
0.01979
1.252 x 10-5
1.474 x 10-5
9.319 x 10-6
0.7440
- 40
1.514
1002
0.02057
1.356 x 10-5
1.527 x 10-5
1.008 x 10-5
0.7436
- 30
1.451
1004
0.02134
1.465 x 10-5
1.579 x 10-5
1.087 x 10-5
0.7425
- 20
1.394
1005
0.02211
1.578 x 10-5
1.630 x 10-5
1.169 x 10-5
0.7408
- 10
1.341
1006
0.02288
1.696 x 10-5
1.680 x 10-5
1.252 x 10-5
0.7387
0
1.292
1006
0.02364
1.818 x 10-5
1.729 x 10-5
1.338 x 10-5
0.7362
5
1.269
1006
0.02401
1.880 x 10-5
1.754 x 10-5
1.382 x 10-5
0.7350
10
1.246
1006
0.02439
1.944 x 10-5
1.778 x 10-5
1.426 x 10-5
0.7336
15
1.225
1007
0.02476
2.009 x 10-5
1.802 x 10-5
1.470 x 10-5
0.7323
20
1.204
1007
0.02514
2.074 x 10-5
1.825 x 10-5
1.516 x 10-5
0.7309
25
1.184
1007
0.02551
2.141 x 10-5
1.849 x 10-5
1.562 x 10-5
0.7296
30
1.164
1007
0.02588
2.208 x 10-5
1.872 x 10-5
1.608 x 10-5
0.7282
35
1.145
1007
0.02625
2.277 x 10-5
1.895 x 10-5
1.655 x 10-5
0.7268
40
1.127
1007
0.02662
2.346 x 10-5
1.918 x 10-5
1.702 x 10-5
0.7255
45
1.109
1007
0.02699
2.416 x 10-5
1.941 x 10-5
1.750 x 10-5
0.7241
50
1.092
1007
0.02735
2.487 x 10-5
1.963 x 10-5
1.798 x 10-5
0.7228
60
1.059
1007
0.02808
2.632 x 10-5
2.008 x 10-5
1.896 x 10-5
0.7202
70
1.028
1007
0.02881
2.780 x 10-5
2.052 x 10-5
1.995 x 10-5
0.7177
80
0.9994
1008
0.02953
2.931 x 10-5
2.096 x 10-5
2.097 x 10-5
0.7154
90
0.9718
1008
0.03024
3.086 x 10-5
2.139 x 10-5
2.201 x 10-5
0.7132
100
0.9458
1009
0.03095
3.243 x 10-5
2.181 x 10-5
2.306 x 10-5
0.7111
120
0.8977
1011
0.03235
3.565 x 10-5
2.264 x 10-5
2.522 x 10-5
0.7073
140
0.8542
1013
0.03374
3.898 x 10-5
2.345 x 10-5
2.745 x 10-5
0.7041
160
0.8148
1016
0.03511
4.241 x 10-5
2.420 x 10-5
2.975 x 10-5
0.7014
180
0.7788
1019
0.03646
4.593 x 10-5
2.504 x 10-5
3.212 x 10-5
0.6992
200
0.7459
1023
0.03779
4.954 x 10-5
2.577 x 10-5
3.455 x 10-5
0.6974
250
0.6746
1033
0.04104
5.890 x 10-5
2.760 x 10-5
4.091 x 10-5
0.6946
300
0.6158
1044
0.04418
6.871 x 10-5
2.934 x 10-5
4.765 x 10-5
0.6935
350
0.5664
1056
0.04721
7.892 x 10-5
3.101 x 10-5
5.475 x 10-5
0.6937
400
0.5243
1069
0.05015
8.951 x 10-5
3.261 x 10-5
6.219 x 10-5
0.6948
450
0.4880
1081
0.05298
1.004 x 10-4
3.415 x 10-5
6.997 x 10-5
0.6965
500
0.4565
1093
0.05572
1.117 x 10-4
3.563 x 10-5
7.806 x 10-5
0.6986
600
0.4042
1115
0.06093
1.352 x 10-4
3.846 x 10-5
9.515 x 10-5
0.7037
700
0.3627
1135
0.06581
1.598 x 10-4
4.111 x 10-5
1.133 x 10-4
0.7092
800
0.3289
1153
0.07037
1.855 x 10-4
4.362 x 10-5
1.326 x 10-4
0.7149
900
0.3008
1169
0.07465
2.122 x 10-4
4.600 x 10-5
1.529 x 10-4
0.7206
1000
0.2772
1184
0.07868
2.398 x 10-4
4.826 x 10-5
1.741 x 10-4
0.7260
1500
0.1990
1234
0.09599
3.908 x 10-4
5.817 x 10-5
2.922 x 10-4
0.7478
2000
0.1553
1264
0.11113
5.664 x 10-4
6.630 x 10-5
4.270 x 10-4
0.7539

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