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Soil Heat Transducers and Water Vapor Flow
Author(s) -
Cary J. W.
Publication year - 1979
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1979.03615995004300050003x
Subject(s) - loam , thermal conductivity , thermal diffusivity , soil water , calorimeter (particle physics) , materials science , quartz , isothermal process , heat flux , water vapor , thermodynamics , diffusion , analytical chemistry (journal) , chemistry , soil science , heat transfer , composite material , environmental science , optics , physics , chromatography , organic chemistry , detector
The heat flow through a silt loam, silty clay, and loamy sand were measured in a calorimeter at 7 and 36°C under matrix potentials near −0.3 bars. The transient thermal conductivity probe, the heat flux transducer, and deVries's theoretical method all gave low values of the apparent thermal conductivity at 36°C. An empirical correction was proposed for deVries's method that improved its agreement with the observed conductivities. The thermal vapor diffusion coefficients for the three soils were then calculated from his equation and compared with experimental values from the calorimeter. It was also shown that the thermal water vapor flow can be estimated if one knows the soil's saturated thermal conductivity, quartz content, water content, bulk density and temperature distribution.