Laboratory simulation of thermal erosion: possible application to pollution problems
Abstract In the Arctic, thermal erosion results from ground thawing produced by heat transfer when water is flowing upon the frozen ground. A mathematical model has been proposed to determine the efficiency of the process and the rate of thermal erosion. Considering a constant heat-transfer coeffici...
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Cambridge University Press (CUP)
1999
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crcambridgeupr:10.1017/s0032247400026358 2024-03-03T08:42:16+00:00 Laboratory simulation of thermal erosion: possible application to pollution problems Makhloufi, N. Costard, F. Puente, J. Aguirre Costard, J. Cano, R. Posado Guillemet, G. 1999 http://dx.doi.org/10.1017/s0032247400026358 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0032247400026358 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Polar Record volume 35, issue 192, page 67-72 ISSN 0032-2474 1475-3057 General Earth and Planetary Sciences Ecology Geography, Planning and Development journal-article 1999 crcambridgeupr https://doi.org/10.1017/s0032247400026358 2024-02-08T08:24:54Z Abstract In the Arctic, thermal erosion results from ground thawing produced by heat transfer when water is flowing upon the frozen ground. A mathematical model has been proposed to determine the efficiency of the process and the rate of thermal erosion. Considering a constant heat-transfer coefficient, the resulting thermal flux at the groundsurface produces ground thaw, and the unfrozen sediments can be removed by the water flow. A particular case of an ablation model consists of an immediate removing of sediments by a strong flow and by the action of gravity. An experimental hydraulic device was built to test the authors' theoretical ablation model, describing a fluvial thermalerosionprocess. The effect of different parameters (Reynolds number, water temperature, ground-ice temperature) on the rate of thermal erosion for samples of frozen sand was investigated. Results from the experiments are in agreement with theoretical estimates using the mathematical model. Moreover, this study shows a hierarchy of parameters in terms of efficiency of the fluvial thermal-erosion process. A discussion of the possible effects of the contaminants on the erosion rate leads the authors to propose two kinds of experiments: a contaminated frozen sample eroded by a water flow, varying in this case the thermophysical properties of the sample (density, specific heat capacity, a latent heat, and change of phase), and an experiment consisting of erosion of a frozen sample by contaminated flow. This second case is also complex due to many mechanical, hydrodynamic and thermal interactions at the ground surface. This paper reports results of thermal erosionfrom experiments with icesaturated sand. A pure ice sample is used to determine the heat-transfer coefficient. Article in Journal/Newspaper Arctic Polar Record Cambridge University Press Arctic Polar Record 35 192 67 72 |
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Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
General Earth and Planetary Sciences Ecology Geography, Planning and Development |
spellingShingle |
General Earth and Planetary Sciences Ecology Geography, Planning and Development Makhloufi, N. Costard, F. Puente, J. Aguirre Costard, J. Cano, R. Posado Guillemet, G. Laboratory simulation of thermal erosion: possible application to pollution problems |
topic_facet |
General Earth and Planetary Sciences Ecology Geography, Planning and Development |
description |
Abstract In the Arctic, thermal erosion results from ground thawing produced by heat transfer when water is flowing upon the frozen ground. A mathematical model has been proposed to determine the efficiency of the process and the rate of thermal erosion. Considering a constant heat-transfer coefficient, the resulting thermal flux at the groundsurface produces ground thaw, and the unfrozen sediments can be removed by the water flow. A particular case of an ablation model consists of an immediate removing of sediments by a strong flow and by the action of gravity. An experimental hydraulic device was built to test the authors' theoretical ablation model, describing a fluvial thermalerosionprocess. The effect of different parameters (Reynolds number, water temperature, ground-ice temperature) on the rate of thermal erosion for samples of frozen sand was investigated. Results from the experiments are in agreement with theoretical estimates using the mathematical model. Moreover, this study shows a hierarchy of parameters in terms of efficiency of the fluvial thermal-erosion process. A discussion of the possible effects of the contaminants on the erosion rate leads the authors to propose two kinds of experiments: a contaminated frozen sample eroded by a water flow, varying in this case the thermophysical properties of the sample (density, specific heat capacity, a latent heat, and change of phase), and an experiment consisting of erosion of a frozen sample by contaminated flow. This second case is also complex due to many mechanical, hydrodynamic and thermal interactions at the ground surface. This paper reports results of thermal erosionfrom experiments with icesaturated sand. A pure ice sample is used to determine the heat-transfer coefficient. |
format |
Article in Journal/Newspaper |
author |
Makhloufi, N. Costard, F. Puente, J. Aguirre Costard, J. Cano, R. Posado Guillemet, G. |
author_facet |
Makhloufi, N. Costard, F. Puente, J. Aguirre Costard, J. Cano, R. Posado Guillemet, G. |
author_sort |
Makhloufi, N. |
title |
Laboratory simulation of thermal erosion: possible application to pollution problems |
title_short |
Laboratory simulation of thermal erosion: possible application to pollution problems |
title_full |
Laboratory simulation of thermal erosion: possible application to pollution problems |
title_fullStr |
Laboratory simulation of thermal erosion: possible application to pollution problems |
title_full_unstemmed |
Laboratory simulation of thermal erosion: possible application to pollution problems |
title_sort |
laboratory simulation of thermal erosion: possible application to pollution problems |
publisher |
Cambridge University Press (CUP) |
publishDate |
1999 |
url |
http://dx.doi.org/10.1017/s0032247400026358 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0032247400026358 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Polar Record |
genre_facet |
Arctic Polar Record |
op_source |
Polar Record volume 35, issue 192, page 67-72 ISSN 0032-2474 1475-3057 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0032247400026358 |
container_title |
Polar Record |
container_volume |
35 |
container_issue |
192 |
container_start_page |
67 |
op_container_end_page |
72 |
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1792497695993102336 |