OBSERVATIONS OF TURBULENT DIFFUSIONIN A NATURAL CHANNEL
Fluid flow is a diffusion process. For homogeneous turbulence, dispersion occurs normally about the center of the process, the rate of growth depending on the diffusion coefficients K i .Measurements of K i for longitudinal and lateral diffusion are presented for the Lewis River, a proglacial stream...
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Canadian Science Publishing
1967
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crcansciencepubl:10.1139/e67-059 2023-12-17T10:27:36+01:00 OBSERVATIONS OF TURBULENT DIFFUSIONIN A NATURAL CHANNEL Church, Michael 1967 http://dx.doi.org/10.1139/e67-059 http://www.nrcresearchpress.com/doi/pdf/10.1139/e67-059 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 4, issue 5, page 855-872 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1967 crcansciencepubl https://doi.org/10.1139/e67-059 2023-11-19T13:38:55Z Fluid flow is a diffusion process. For homogeneous turbulence, dispersion occurs normally about the center of the process, the rate of growth depending on the diffusion coefficients K i .Measurements of K i for longitudinal and lateral diffusion are presented for the Lewis River, a proglacial stream in north-central Baffin Island. In the river, flows up to 250 m 3 /s, fully turbulent, are characterized by 'roller eddies'. Observations were made by electro-chemical recording of longitudinal dispersion of salt solutions and by photography of lateral dispersal of dye plumes. It is shown that the K-values depend on the scale of flow, while the overall pattern of diffusion depends on the flow and channel geometry of the stream.The geomorphological consequences of diffusion include the phenomenon of momentum transfer in the channel and resultant shear stresses brought to bear on the walls, and the pattern of sediment transport. Article in Journal/Newspaper Baffin Island Baffin Canadian Science Publishing (via Crossref) Baffin Island Canadian Journal of Earth Sciences 4 5 855 872 |
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 Church, Michael OBSERVATIONS OF TURBULENT DIFFUSIONIN A NATURAL CHANNEL |
topic_facet |
General Earth and Planetary Sciences |
description |
Fluid flow is a diffusion process. For homogeneous turbulence, dispersion occurs normally about the center of the process, the rate of growth depending on the diffusion coefficients K i .Measurements of K i for longitudinal and lateral diffusion are presented for the Lewis River, a proglacial stream in north-central Baffin Island. In the river, flows up to 250 m 3 /s, fully turbulent, are characterized by 'roller eddies'. Observations were made by electro-chemical recording of longitudinal dispersion of salt solutions and by photography of lateral dispersal of dye plumes. It is shown that the K-values depend on the scale of flow, while the overall pattern of diffusion depends on the flow and channel geometry of the stream.The geomorphological consequences of diffusion include the phenomenon of momentum transfer in the channel and resultant shear stresses brought to bear on the walls, and the pattern of sediment transport. |
format |
Article in Journal/Newspaper |
author |
Church, Michael |
author_facet |
Church, Michael |
author_sort |
Church, Michael |
title |
OBSERVATIONS OF TURBULENT DIFFUSIONIN A NATURAL CHANNEL |
title_short |
OBSERVATIONS OF TURBULENT DIFFUSIONIN A NATURAL CHANNEL |
title_full |
OBSERVATIONS OF TURBULENT DIFFUSIONIN A NATURAL CHANNEL |
title_fullStr |
OBSERVATIONS OF TURBULENT DIFFUSIONIN A NATURAL CHANNEL |
title_full_unstemmed |
OBSERVATIONS OF TURBULENT DIFFUSIONIN A NATURAL CHANNEL |
title_sort |
observations of turbulent diffusionin a natural channel |
publisher |
Canadian Science Publishing |
publishDate |
1967 |
url |
http://dx.doi.org/10.1139/e67-059 http://www.nrcresearchpress.com/doi/pdf/10.1139/e67-059 |
geographic |
Baffin Island |
geographic_facet |
Baffin Island |
genre |
Baffin Island Baffin |
genre_facet |
Baffin Island Baffin |
op_source |
Canadian Journal of Earth Sciences volume 4, issue 5, page 855-872 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e67-059 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
4 |
container_issue |
5 |
container_start_page |
855 |
op_container_end_page |
872 |
_version_ |
1785579482082443264 |