DTIC ADA071809: Laminar and Turbulent Boundary Layers Adjacent to M... | |
by Defense Technical Information Center | |
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A laboratory study of melting vertical ice sheets | |
immersed in sodium chloride solutions of oceanic | |
temperatures and salinities found that the convective | |
motions generated by the melting consist of two regions | |
confined to a boundary layer adjacent to the ice. The | |
first region, at the bottom of the ice, is laminar and | |
bidirectional, with a 2 to 3 mm thick upward flowing | |
layer next to the ice inside of a 10 mm thick outer | |
downward flowing layer. This bidirectionality results | |
from the large difference between the thermal and saline | |
diffusivities which contain dilute water near the ice and | |
allows the cooling to diffuse further from the ice. Near | |
the ice, dilute cold water rises; while away from the | |
ice, cold saline water sinks. Second, further up the ice, | |
the inner layer goes through a region of transition and | |
becomes fully turbulent when the saline Grashof number | |
reaches 2 x 10 to the 8th power. The turubulent flow is | |
upward, unidirectional and the dominant flow in the | |
oceans. | |
Date Published: 2017-09-22 06:00:17 | |
Identifier: DTIC_ADA071809 | |
Item Size: 146305797 | |
Language: english | |
Media Type: texts | |
# Topics | |
DTIC Archive; Josberger,Edward George... | |
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@chris85 | |
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