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

被引：28

作者：

Bednarz, Tomasz P. ^{[1
]}

Lei, Chengwang ^{[1
]}

Patterson, John C. ^{[1
]}

机构：

[1] James Cook Univ N Queensland, Sch Engn, Townsville, Qld 4811, Australia

来源：

EXPERIMENTAL THERMAL AND FLUID SCIENCE | 2008年 / 32卷 / 03期

基金：

澳大利亚研究理事会;

关键词：

natural convection; reservoirs; exchange flows; thermo-chromic liquid crystals;

D O I：

10.1016/j.expthermflusci.2007.10.007

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

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. (C) 2007 Elsevier Inc. All rights reserved.

引用

页码：844 / 856

页数：13

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