Derivation of an Explicit Form of the Percolation-Based Effective-Medium Approximation for Thermal Conductivity of Partially Saturated Soils

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dc.contributor.author Sadeghi, Morteza
dc.contributor.author Ghanbarian, Behzad
dc.contributor.author Horton, Robert
dc.contributor.author Horton, Robert
dc.contributor.department Agronomy
dc.date 2018-01-26T06:38:49.000
dc.date.accessioned 2020-06-29T23:04:39Z
dc.date.available 2020-06-29T23:04:39Z
dc.date.copyright Mon Jan 01 00:00:00 UTC 2018
dc.date.issued 2018-01-01
dc.description.abstract <p>Thermal conductivity is an essential component in multi-physics models and coupled simulation of heat transfer, fluid flow and solute transport in porous media. In the literature, various empirical, semi-empirical, and physical models were developed for thermal conductivity and its estimation in partially saturated soils. Recently, Ghanbarian and Daigle (GD) proposed a theoretical model, using the percolation-based effective-medium approximation, whose parameters are physically meaningful. The original GD model implicitly formulates thermal conductivity λ as a function of volumetric water content θ. For the sake of computational efficiency in numerical calculations, in this study we derive an explicit λ(θ) form of the GD model. We also demonstrate that some well-known empirical models, e.g., Chung-Horton, widely applied in the HYDRUS model, as well as mixing models are special cases of the GD model under specific circumstances. Comparison with experiments indicates that the GD model can accurately estimate soil thermal conductivity.</p>
dc.description.comments <p>This is a manuscript of an article published as Sadeghi, M., Ghanbarian, B. and Horton, R. (2018), Derivation of an Explicit Form of the Percolation-Based Effective-Medium Approximation for Thermal Conductivity of Partially Saturated Soils. Water Resour. Res. doi: <a href="http://dx.doi.org/10.1002/2017WR021714" target="_blank">10.1002/2017WR021714</a>. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/agron_pubs/368/
dc.identifier.articleid 1450
dc.identifier.contextkey 11412230
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath agron_pubs/368
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/4718
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/agron_pubs/368/2018_Horton_DerivationExplicitManuscript.pdf|||Fri Jan 14 23:48:32 UTC 2022
dc.source.uri 10.1002/2017WR021714
dc.subject.disciplines Agriculture
dc.subject.disciplines Hydrology
dc.subject.disciplines Soil Science
dc.subject.disciplines Statistical Models
dc.subject.keywords Thermal conductivity
dc.subject.keywords empirical models
dc.subject.keywords mixing models
dc.subject.keywords percolation-based effective-medium approximation
dc.subject.keywords HYDRUS
dc.title Derivation of an Explicit Form of the Percolation-Based Effective-Medium Approximation for Thermal Conductivity of Partially Saturated Soils
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication d3fb0917-6868-417e-9695-a010896cfafa
relation.isOrgUnitOfPublication fdd5c06c-bdbe-469c-a38e-51e664fece7a
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