On the Temperature Distribution in an Air-Ventilated Snow Layer
The problem of simultaneous heat and mass transfer in a homogeneous snow layer, with one side kept at its initial temperature and the other side with a step temperature increase, was solved for the case of constant through-flow conditions. An experimentally determined effective thermal conductivity...
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ftdtic:ADA115598 2023-05-15T16:37:47+02:00 On the Temperature Distribution in an Air-Ventilated Snow Layer Yen,Yin-Chao COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH 1982-03 text/html http://www.dtic.mil/docs/citations/ADA115598 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA115598 en eng http://www.dtic.mil/docs/citations/ADA115598 APPROVED FOR PUBLIC RELEASE DTIC AND NTIS Snow Ice and Permafrost Fluid Mechanics Thermodynamics *Snow Layers Heat transfer Temperature Distribution Temperature gradients Air flow Mass transfer Ventilation Counterflow PE61102A AST24 WU003 Text 1982 ftdtic 2016-02-19T08:05:14Z The problem of simultaneous heat and mass transfer in a homogeneous snow layer, with one side kept at its initial temperature and the other side with a step temperature increase, was solved for the case of constant through-flow conditions. An experimentally determined effective thermal conductivity function, i.e. Ke = 0.0014 + 0.58 G (where G is dry mass flow rate of air in g/sq cm-s), was employed in the solution. The computed nondimensional temperature distribution agreed quite well with experimental data taken under pseudo-steady state conditions with the exception of the temperature for the lowest flow rate used in the experiment. The pronounced nonlinearity of the temperature distribution was found to be a strong function of the flow rate. For sinusoidal variation of atmospheric pressure, the responding flow in the snow medium was also found to be sinusoidal. In conjunction with the diurnal temperature change, this variation facilitated the process of repeated sublimation and condensation in alternate directions and thereby produced a surface layer of approximately constant snow density. (Author) Text Ice permafrost Defense Technical Information Center: DTIC Technical Reports database |
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Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Snow Ice and Permafrost Fluid Mechanics Thermodynamics *Snow Layers Heat transfer Temperature Distribution Temperature gradients Air flow Mass transfer Ventilation Counterflow PE61102A AST24 WU003 |
spellingShingle |
Snow Ice and Permafrost Fluid Mechanics Thermodynamics *Snow Layers Heat transfer Temperature Distribution Temperature gradients Air flow Mass transfer Ventilation Counterflow PE61102A AST24 WU003 Yen,Yin-Chao On the Temperature Distribution in an Air-Ventilated Snow Layer |
topic_facet |
Snow Ice and Permafrost Fluid Mechanics Thermodynamics *Snow Layers Heat transfer Temperature Distribution Temperature gradients Air flow Mass transfer Ventilation Counterflow PE61102A AST24 WU003 |
description |
The problem of simultaneous heat and mass transfer in a homogeneous snow layer, with one side kept at its initial temperature and the other side with a step temperature increase, was solved for the case of constant through-flow conditions. An experimentally determined effective thermal conductivity function, i.e. Ke = 0.0014 + 0.58 G (where G is dry mass flow rate of air in g/sq cm-s), was employed in the solution. The computed nondimensional temperature distribution agreed quite well with experimental data taken under pseudo-steady state conditions with the exception of the temperature for the lowest flow rate used in the experiment. The pronounced nonlinearity of the temperature distribution was found to be a strong function of the flow rate. For sinusoidal variation of atmospheric pressure, the responding flow in the snow medium was also found to be sinusoidal. In conjunction with the diurnal temperature change, this variation facilitated the process of repeated sublimation and condensation in alternate directions and thereby produced a surface layer of approximately constant snow density. (Author) |
author2 |
COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH |
format |
Text |
author |
Yen,Yin-Chao |
author_facet |
Yen,Yin-Chao |
author_sort |
Yen,Yin-Chao |
title |
On the Temperature Distribution in an Air-Ventilated Snow Layer |
title_short |
On the Temperature Distribution in an Air-Ventilated Snow Layer |
title_full |
On the Temperature Distribution in an Air-Ventilated Snow Layer |
title_fullStr |
On the Temperature Distribution in an Air-Ventilated Snow Layer |
title_full_unstemmed |
On the Temperature Distribution in an Air-Ventilated Snow Layer |
title_sort |
on the temperature distribution in an air-ventilated snow layer |
publishDate |
1982 |
url |
http://www.dtic.mil/docs/citations/ADA115598 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA115598 |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA115598 |
op_rights |
APPROVED FOR PUBLIC RELEASE |
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1766028089261817856 |