Measurement and Estimation of State Variables - Unsaturated Soil Mechanics in Engineering Practice - page 141

0.70

λ = 0.0014 t + 0.5743

0.65

0.60

0.55

0.50

0 10 20 30 40 50 60 70 80

Temperature, ° C

Figure 4.50 Thermal conductivity of water versus temperature with linear best-fit equation
(after Shuai et al., 2002).

2.0

Ceramic

1.7 1.7

1.6

1.2

0.8

Water

0.561

0.673

0.4

0.0317

0.0241 Air

0.0

0 20 40 60 80 100

Temperature, ˚C

Figure 4.51 Comparison of thermal conductivity of ceramic, air, and water (after Shuai et al.,
2002).

26

25

24

23

22

916

914

912

910

908

906

0 5 10 15 20 25 30 35 40 45

Time, h

Figure 4.52 Observed reaction of thermal conductivity suction sensors to ambient temperature
changes (after Shuai et al., 2002).