Thermal conductivity measurements on saturated rocks at permafrost temperatures
A simple divided-bar apparatus for studying the thermal conductivity of rocks and soils at permafrost temperatures is described. The apparatus is intended also for use with permafrost specimens tested in their natural frozen state. It has been designed for low heat fluxes and consequent small temper...
Published in: | Canadian Journal of Earth Sciences |
---|---|
Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Canadian Science Publishing
1979
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1139/e79-007 http://www.nrcresearchpress.com/doi/pdf/10.1139/e79-007 |
id |
crcansciencepubl:10.1139/e79-007 |
---|---|
record_format |
openpolar |
spelling |
crcansciencepubl:10.1139/e79-007 2023-12-17T10:31:32+01:00 Thermal conductivity measurements on saturated rocks at permafrost temperatures King, M. S. 1979 http://dx.doi.org/10.1139/e79-007 http://www.nrcresearchpress.com/doi/pdf/10.1139/e79-007 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 16, issue 1, page 73-79 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1979 crcansciencepubl https://doi.org/10.1139/e79-007 2023-11-19T13:38:50Z A simple divided-bar apparatus for studying the thermal conductivity of rocks and soils at permafrost temperatures is described. The apparatus is intended also for use with permafrost specimens tested in their natural frozen state. It has been designed for low heat fluxes and consequent small temperature drops across the test specimen, while retaining a high precision of measurement.Different thicknesses of two water-saturated sandstones and a limestone have been tested as a function of changes in temperature, frozen and unfrozen. Significant corrections for the contact resistance between the specimen and divided bar were determined. The influence of the magnitude of temperature gradient across the specimen was not found to be important for the low gradients employed in these experiments.The measured thermal conductivities show a slight decrease in value with temperature increasing to 0 °C. In the neighbourhood of 0 °C, a sharp reduction in thermal conductivity was observed as the ice–water phase change occurred. It is clear that the magnitude of the thermal conductivity of the rocks depends on their mineral content; quartz, with its high thermal conductivity, plays the predominant role where it is present. Article in Journal/Newspaper Ice permafrost Canadian Science Publishing (via Crossref) Canadian Journal of Earth Sciences 16 1 73 79 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences King, M. S. Thermal conductivity measurements on saturated rocks at permafrost temperatures |
topic_facet |
General Earth and Planetary Sciences |
description |
A simple divided-bar apparatus for studying the thermal conductivity of rocks and soils at permafrost temperatures is described. The apparatus is intended also for use with permafrost specimens tested in their natural frozen state. It has been designed for low heat fluxes and consequent small temperature drops across the test specimen, while retaining a high precision of measurement.Different thicknesses of two water-saturated sandstones and a limestone have been tested as a function of changes in temperature, frozen and unfrozen. Significant corrections for the contact resistance between the specimen and divided bar were determined. The influence of the magnitude of temperature gradient across the specimen was not found to be important for the low gradients employed in these experiments.The measured thermal conductivities show a slight decrease in value with temperature increasing to 0 °C. In the neighbourhood of 0 °C, a sharp reduction in thermal conductivity was observed as the ice–water phase change occurred. It is clear that the magnitude of the thermal conductivity of the rocks depends on their mineral content; quartz, with its high thermal conductivity, plays the predominant role where it is present. |
format |
Article in Journal/Newspaper |
author |
King, M. S. |
author_facet |
King, M. S. |
author_sort |
King, M. S. |
title |
Thermal conductivity measurements on saturated rocks at permafrost temperatures |
title_short |
Thermal conductivity measurements on saturated rocks at permafrost temperatures |
title_full |
Thermal conductivity measurements on saturated rocks at permafrost temperatures |
title_fullStr |
Thermal conductivity measurements on saturated rocks at permafrost temperatures |
title_full_unstemmed |
Thermal conductivity measurements on saturated rocks at permafrost temperatures |
title_sort |
thermal conductivity measurements on saturated rocks at permafrost temperatures |
publisher |
Canadian Science Publishing |
publishDate |
1979 |
url |
http://dx.doi.org/10.1139/e79-007 http://www.nrcresearchpress.com/doi/pdf/10.1139/e79-007 |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_source |
Canadian Journal of Earth Sciences volume 16, issue 1, page 73-79 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e79-007 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
16 |
container_issue |
1 |
container_start_page |
73 |
op_container_end_page |
79 |
_version_ |
1785584862027055104 |