Numerical Simulation of Unsaturated Evaporation and Drying Front Advancing in One-Dimensional Soil Columns

Zhang Hua; Gao Kang; Xiong Yi

doi:10.4028/www.scientific.net/AMM.353-356.730

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 353-356Numerical Simulation of Unsaturated Evaporation...

Numerical Simulation of Unsaturated Evaporation and Drying Front Advancing in One-Dimensional Soil Columns

Abstract:

A coupled model of heat-moisture flow with Penman-Wilson evaporation boundary condition is used for simulating evaporation processes in three 1D vertical columns with different dry densities. The simulation results show that unsaturated evaporation process has three stages, i.e. constant-rate stage, falling-rate stage and residual stage. The depth of drying front has a great influence on soil actual evaporation. The actual evaporation decreases as the drying front advancing downward. The total evaporation decreased with the increase of soil dry density. The velocity of drying front advancing in the soil of higher dry density is faster than that of lower dry density.

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Periodical:

Applied Mechanics and Materials (Volumes 353-356)

Pages:

730-734

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.353-356.730

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Online since:

August 2013

Authors:

Zhang Hua, Gao Kang, Xiong Yi

Keywords:

Drying Front, Heat-Moisture Flow, Numerical Simulation, Unsaturated Evaporation

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