Water vapor diffusion in relatively dry soil: I. Theoretical considerations and sorption experiments
1964
Jackson, Ray D.
Water transfer was measured in three soil materials at water content ranges corresponding to a relative pressure range of 0.97 to about 0.05. At these water contents vapor flow is probably the predominant transfer mechanism. The data were obtained from a transient sorption experiment and diffusion coefficients were calculated from analyses of water content distribution curves. The evaporation-condensation reaction between the liquid and vapor phases was treated by using simultaneous diffusion-reaction theory. Within the water content ranges used the diffusion coefficients increase and then decrease with increasing water content.
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