Measurement of the Shear Stress on the Underside of Simulated Ice Covers
The fluid shear stress applied to the underside of a simulated floating ice cover was measured in a laboratory flume. The measured values were compared with values of the shear stress computed from the von Karman-Prandtl velocity distribution fitted to the velocity profiles measured beneath the cove...
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ftdtic:ADA094621 2023-05-15T16:37:09+02:00 Measurement of the Shear Stress on the Underside of Simulated Ice Covers Calkins,Darryl J Mueller,Andreas COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH 1980-10 text/html http://www.dtic.mil/docs/citations/ADA094621 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA094621 en eng http://www.dtic.mil/docs/citations/ADA094621 APPROVED FOR PUBLIC RELEASE DTIC AND NTIS Snow Ice and Permafrost Mechanics *ICE *SHEAR STRESSES VELOCITY WATER FLOW LABORATORY TESTS ROUGHNESS CHANNELS(WATERWAYS) FLOATING BODIES Underside Floating ice LPN-CWTS-31357 Text 1980 ftdtic 2016-02-20T19:23:08Z The fluid shear stress applied to the underside of a simulated floating ice cover was measured in a laboratory flume. The measured values were compared with values of the shear stress computed from the von Karman-Prandtl velocity distribution fitted to the velocity profiles measured beneath the cover. For the lower velocity runs (approx 0.079 m/s) the measured and computed values of the shear stress were in close agreement. At the high velocity flows (approx 0.137 m/s) the measured values were roughly one-half those calculated from the velocity distribution. As the underside of the cover became increasingly rougher, the position of maximum velocity moved closer to the bottom of the channel. It was shown that the Darcy friction coefficient is exponentially related to a normalized ice cover thickness, which suggests that it is measure of the roughness of a fragmented ice cover. (Author) Text Ice permafrost Defense Technical Information Center: DTIC Technical Reports database |
institution |
Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Snow Ice and Permafrost Mechanics *ICE *SHEAR STRESSES VELOCITY WATER FLOW LABORATORY TESTS ROUGHNESS CHANNELS(WATERWAYS) FLOATING BODIES Underside Floating ice LPN-CWTS-31357 |
spellingShingle |
Snow Ice and Permafrost Mechanics *ICE *SHEAR STRESSES VELOCITY WATER FLOW LABORATORY TESTS ROUGHNESS CHANNELS(WATERWAYS) FLOATING BODIES Underside Floating ice LPN-CWTS-31357 Calkins,Darryl J Mueller,Andreas Measurement of the Shear Stress on the Underside of Simulated Ice Covers |
topic_facet |
Snow Ice and Permafrost Mechanics *ICE *SHEAR STRESSES VELOCITY WATER FLOW LABORATORY TESTS ROUGHNESS CHANNELS(WATERWAYS) FLOATING BODIES Underside Floating ice LPN-CWTS-31357 |
description |
The fluid shear stress applied to the underside of a simulated floating ice cover was measured in a laboratory flume. The measured values were compared with values of the shear stress computed from the von Karman-Prandtl velocity distribution fitted to the velocity profiles measured beneath the cover. For the lower velocity runs (approx 0.079 m/s) the measured and computed values of the shear stress were in close agreement. At the high velocity flows (approx 0.137 m/s) the measured values were roughly one-half those calculated from the velocity distribution. As the underside of the cover became increasingly rougher, the position of maximum velocity moved closer to the bottom of the channel. It was shown that the Darcy friction coefficient is exponentially related to a normalized ice cover thickness, which suggests that it is measure of the roughness of a fragmented ice cover. (Author) |
author2 |
COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH |
format |
Text |
author |
Calkins,Darryl J Mueller,Andreas |
author_facet |
Calkins,Darryl J Mueller,Andreas |
author_sort |
Calkins,Darryl J |
title |
Measurement of the Shear Stress on the Underside of Simulated Ice Covers |
title_short |
Measurement of the Shear Stress on the Underside of Simulated Ice Covers |
title_full |
Measurement of the Shear Stress on the Underside of Simulated Ice Covers |
title_fullStr |
Measurement of the Shear Stress on the Underside of Simulated Ice Covers |
title_full_unstemmed |
Measurement of the Shear Stress on the Underside of Simulated Ice Covers |
title_sort |
measurement of the shear stress on the underside of simulated ice covers |
publishDate |
1980 |
url |
http://www.dtic.mil/docs/citations/ADA094621 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA094621 |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA094621 |
op_rights |
APPROVED FOR PUBLIC RELEASE |
_version_ |
1766027447455711232 |