| Registro completo |
| Provedor de dados: |
Rev. Bras. Ciênc. Solo
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| País: |
Brazil
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| Título: |
Determining the In Situ Apparent Thermal Diffusivity of a Sandy Soil
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| Autores: |
Aguilar,Oscar Fernando Silva
Arredondo,Jorge Alberto Andaverde
Trujillo,Beatris Adriana Escobedo
Fundora,Artemio Jesús Benitez
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| Data: |
2018-01-01
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| Ano: |
2018
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| Palavras-chave: |
Geothermal
Thermal properties
Conductivity
Error propagation
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| Resumo: |
ABSTRACT: The thermal wave amplitude method is used to determine soil thermal diffusivity in situ for a sandy soil in Mexico (Coatzacoalcos, Veracruz). Soil diurnal temperature fluctuations were measured from depths of 0.05 to 0.65 m, in 0.01 m increments, during the months of April and August. Five mean diffusivity values were obtained experimentally, corresponding to the different depths combination. The soil thermal diffusivity ranged between 2.26 × 10−7 and 8.71 × 10−7 m2 s−1. The diffusivity values obtained are within the absolute ranges reported in the literature. A positive linear effect between the diffusivity values and depth was observed on a homogeneous sandy soil. These increments are due to the soil moisture variations and the volumetric calorific capacity of the soil. An uncertainty analysis was made to validate our results, resulting in a relative standard deviation with values in the range of 4.51 to 27.37 %. The uncertainties of 0.49 to 26.66 % RSD in the amplitude of the thermal wave are the factor that contributes most to the propagation of errors of the diffusivity.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100425
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| Editor: |
Sociedade Brasileira de Ciência do Solo
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| Relação: |
10.1590/18069657rbcs20180025
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| Formato: |
text/html
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| Fonte: |
Revista Brasileira de Ciência do Solo v.42 2018
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| Direitos: |
info:eu-repo/semantics/openAccess
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