Author: Paul W. RichmondPublisher:
ISBN:
Category : Heat
Languages : en
Pages : 62
Book Description
Heat Transfer from Water Flowing Through a Chilled-bed Open Channel
Author: Paul W. RichmondPublisher:
ISBN:
Category : Heat
Languages : en
Pages : 62
Book Description
CRREL Report
Author: Scientific and Technical Aerospace Reports
Author: NBS Special Publication
Author: Publisher:
ISBN:
Category : Weights and measures
Languages : en
Pages : 590
Book Description
Experimental Determination of Heat Transfer Coefficients in Water Flowing Over a Horizontal Ice Sheet
Author: Virgil J. LunardiniPublisher:
ISBN:
Category : Heat
Languages : en
Pages : 98
Book Description
Experiments to study the melting of a horizontal ice sheet with a flow of water above it were conducted in a 35 m long refrigerated flume with a cross section of 1.2x1.2 m. Water depth, temperature, and velocity were varied as well as the temperature and initial surface profile of the ice sheet. The heat transfer regimes were found to consist of forced turbulent flow at high Reynolds numbers with a transition to free convection heat transfer. There was no convincing evidence of a forced laminar regime. The data were correlated for each of the regimes, with the Reynolds number, Re, or the Grashof number combined with the Reynolds number as Gr/Re to the 2.5 power used to characterize the different kinds of heat transfer. For water flowing over a horizontal ice sheet, the melting heat flux, for low flow velocities, was not found to drop below the value for the free convection case-488.5 W/sq m-as long as the water temperature exceeds 3.4 C. This is significant since the free convection melt values far exceed those for laminar forced convection. At the low flow velocities, the melting flux was not dependent upon the fluid temperature until the water temperature dropped below 3.4 C, when q sub c = 135.7 (Delta T). In general, the heat transfer was found to significantly exceed that of non-melting systems for the same regimes. This was attributed to increased free stream turbulence, thermal instability due to the density maximum of water near 4 C, and the turbulent eddies associated with the generation of a wavy ice surface during the melting.
CRREL Benchnotes
Author: Selected Water Resources Abstracts
Author: Hydraulic Research in the United States and Canada
Author: United States. National Bureau of StandardsPublisher:
ISBN:
Category : Hydraulic engineering
Languages : en
Pages : 384
Book Description
Hydraulic Research in the United States and Canada, 1972
Author: Gershon KulinPublisher:
ISBN:
Category : Hydraulic engineering
Languages : en
Pages : 344
Book Description
Author: Pauline H. Gurewitz