Conductive and steam-diffuse constituents of thermotransfer in different soil moisture contents: case study of the Altai Region’s soils
The goal of this study was to determine the conductive and steam-diffusive heat transfer constituents in the soil. Based on the solution of differential equation system of heat and mass transfer, the method to determine the conductive and steam-diffusive heat transfer constituents in wet soils was d...
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ftdoajarticles:oai:doaj.org/article:bdfdf9aec6f6485c9aafa03af524fd1c 2023-10-09T21:54:45+02:00 Conductive and steam-diffuse constituents of thermotransfer in different soil moisture contents: case study of the Altai Region’s soils Sergey Makarychev Andrey Bolotov 2017-01-01T00:00:00Z https://doi.org/10.18393/ejss.284264 https://doaj.org/article/bdfdf9aec6f6485c9aafa03af524fd1c EN eng Federation of Eurasian Soil Science Societies http://ejss.fesss.org/10.18393/ejss.284264 https://doaj.org/toc/2147-4249 doi:10.18393/ejss.284264 2147-4249 https://doaj.org/article/bdfdf9aec6f6485c9aafa03af524fd1c Eurasian Journal of Soil Science, Vol 6, Iss 1, Pp 44-50 (2017) Soil thermal capacity thermal conductivity thermal diffusivity thermo-transference in soils Agriculture (General) S1-972 article 2017 ftdoajarticles https://doi.org/10.18393/ejss.284264 2023-09-10T00:46:56Z The goal of this study was to determine the conductive and steam-diffusive heat transfer constituents in the soil. Based on the solution of differential equation system of heat and mass transfer, the method to determine the conductive and steam-diffusive heat transfer constituents in wet soils was developed. To measure the thermophysical properties in laboratory setting, a pulse method of a two-dimensional heat source was used. The method takes into account the patterns of temperature field equalization in an unbounded medium after the heat source termination. A feature of this process is the occurrence of peak temperature at the investigated point of the medium at a given instant. In this experiment, the temperature was controlled not only at the investigated point of the medium, but also at the soil-heater interface. The proposed method was used to study the thermophysical indices of the chernozems of the Altai Region’s Priobye area (the Ob River area). The chernozem under study is of light-loamy particle-size composition; the illuvial horizon В is enriched by a sand fraction. It has been found that the soil conductive thermal diffusivity is reduced with increasing moisture content. The steam-diffusive thermal diffusivity has the extremum at the moisture close to the discontinuous capillary moisture. In humus horizons it plays a smaller role than in the mineral horizons. The thermal diffusivity determined by the steam molecule motion in the pore space of the soil exceeds the conductive thermal diffusivity two or three times. At the same time thermal steam diffusivity is more than ten time lower than the conductive constituent. Eventually, the stem molecules though dramatically accelerating the processes of heat transfer in the soil profile conduct a small amount of heat and make a weak contribution to soil thermal accumulation. Article in Journal/Newspaper ob river Directory of Open Access Journals: DOAJ Articles EURASIAN JOURNAL OF SOIL SCIENCE (EJSS) 6 1 44 44 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
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English |
topic |
Soil thermal capacity thermal conductivity thermal diffusivity thermo-transference in soils Agriculture (General) S1-972 |
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Soil thermal capacity thermal conductivity thermal diffusivity thermo-transference in soils Agriculture (General) S1-972 Sergey Makarychev Andrey Bolotov Conductive and steam-diffuse constituents of thermotransfer in different soil moisture contents: case study of the Altai Region’s soils |
topic_facet |
Soil thermal capacity thermal conductivity thermal diffusivity thermo-transference in soils Agriculture (General) S1-972 |
description |
The goal of this study was to determine the conductive and steam-diffusive heat transfer constituents in the soil. Based on the solution of differential equation system of heat and mass transfer, the method to determine the conductive and steam-diffusive heat transfer constituents in wet soils was developed. To measure the thermophysical properties in laboratory setting, a pulse method of a two-dimensional heat source was used. The method takes into account the patterns of temperature field equalization in an unbounded medium after the heat source termination. A feature of this process is the occurrence of peak temperature at the investigated point of the medium at a given instant. In this experiment, the temperature was controlled not only at the investigated point of the medium, but also at the soil-heater interface. The proposed method was used to study the thermophysical indices of the chernozems of the Altai Region’s Priobye area (the Ob River area). The chernozem under study is of light-loamy particle-size composition; the illuvial horizon В is enriched by a sand fraction. It has been found that the soil conductive thermal diffusivity is reduced with increasing moisture content. The steam-diffusive thermal diffusivity has the extremum at the moisture close to the discontinuous capillary moisture. In humus horizons it plays a smaller role than in the mineral horizons. The thermal diffusivity determined by the steam molecule motion in the pore space of the soil exceeds the conductive thermal diffusivity two or three times. At the same time thermal steam diffusivity is more than ten time lower than the conductive constituent. Eventually, the stem molecules though dramatically accelerating the processes of heat transfer in the soil profile conduct a small amount of heat and make a weak contribution to soil thermal accumulation. |
format |
Article in Journal/Newspaper |
author |
Sergey Makarychev Andrey Bolotov |
author_facet |
Sergey Makarychev Andrey Bolotov |
author_sort |
Sergey Makarychev |
title |
Conductive and steam-diffuse constituents of thermotransfer in different soil moisture contents: case study of the Altai Region’s soils |
title_short |
Conductive and steam-diffuse constituents of thermotransfer in different soil moisture contents: case study of the Altai Region’s soils |
title_full |
Conductive and steam-diffuse constituents of thermotransfer in different soil moisture contents: case study of the Altai Region’s soils |
title_fullStr |
Conductive and steam-diffuse constituents of thermotransfer in different soil moisture contents: case study of the Altai Region’s soils |
title_full_unstemmed |
Conductive and steam-diffuse constituents of thermotransfer in different soil moisture contents: case study of the Altai Region’s soils |
title_sort |
conductive and steam-diffuse constituents of thermotransfer in different soil moisture contents: case study of the altai region’s soils |
publisher |
Federation of Eurasian Soil Science Societies |
publishDate |
2017 |
url |
https://doi.org/10.18393/ejss.284264 https://doaj.org/article/bdfdf9aec6f6485c9aafa03af524fd1c |
genre |
ob river |
genre_facet |
ob river |
op_source |
Eurasian Journal of Soil Science, Vol 6, Iss 1, Pp 44-50 (2017) |
op_relation |
http://ejss.fesss.org/10.18393/ejss.284264 https://doaj.org/toc/2147-4249 doi:10.18393/ejss.284264 2147-4249 https://doaj.org/article/bdfdf9aec6f6485c9aafa03af524fd1c |
op_doi |
https://doi.org/10.18393/ejss.284264 |
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EURASIAN JOURNAL OF SOIL SCIENCE (EJSS) |
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6 |
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