An experimental study of unsteady natural convection in a reservoir model cooled from the water surface

Bednarz, Tomasz P., Lei, Chengwang, and Patterson, John C. (2008) An experimental study of unsteady natural convection in a reservoir model cooled from the water surface. Experimental Thermal and Fluid Science, 32 (3). pp. 844-856.

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Abstract

The general characteristics of unsteady natural convection flow in a reservoir model cooled from the water surface are presented in this paper. Flow visualization was carried out using thermo-chromic liquid crystals, and quantitative temperature measurements were conducted using a PIT (particle image thermometry) technique. The experimental photographs clearly show different stages of the flow development including the growth of a thermal boundary layer below the water surface, the onset of convective instabilities, and further flow development. The present results indicate that the convective motions in reservoirs induced by night-time cooling have a significant impact on water quality and transport of nutrients and pollutants.

Item ID: 6325
Item Type: Article (Refereed Research - C1)
Keywords: natural convection; buoyancy; reservoirs; exchance flows; thermo-chromic liquid christals; flow visualization
ISSN: 0894-1777
Date Deposited: 17 Feb 2010 06:04
FoR Codes: 09 ENGINEERING > 0915 Interdisciplinary Engineering > 091504 Fluidisation and Fluid Mechanics @ 50%
09 ENGINEERING > 0915 Interdisciplinary Engineering > 091505 Heat and Mass Transfer Operations @ 50%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970102 Expanding Knowledge in the Physical Sciences @ 100%
Citation Count from Web of Science Web of Science 12
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