Author:
MAO YADAN,LEI CHENGWANG,PATTERSON JOHN C.
Abstract
Natural convection in calm near-shore waters induced by daytime heating or nighttime cooling plays a significant role in cross-shore exchanges with significant biological and environmental implications. Having previously reported an improved scaling analysis on the daytime radiation-induced natural convection, the authors present in this paper a detailed scaling analysis quantifying the flow properties at varying offshore distances induced by nighttime surface cooling. Two critical functions of offshore distance have been derived to identify the distinctness and the stability of the thermal boundary layer. Two flow scenarios are possible depending on the bottom slope. For the relatively large slope scenario, three flow regimes are possible, which are discussed in detail. For each flow regime, all the possible distinctive subregions are identified. Two different sets of scaling incorporating the offshore-distance dependency have been derived for the conduction-dominated region and stable-convection-dominated region respectively. It is found that the scaling for flow in the stable-convection-dominated region also applies to the time-averaged mean flow in the unstable region. The present scaling results are verified by numerical simulations.
Publisher
Cambridge University Press (CUP)
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics
Reference24 articles.
1. On oceanic boundary mixing.;Wunsch;Deep-Sea Res.,1970
2. Mao Y. , Lei C. & Patterson J. C. 2007 Natural convection in a triangular enclosure induced by solar radiation. Proceedings of the Sixteenth Australasia Fluid Mechanics Conference, Gold Coast, Australia, pp. 406–410.
3. Convective motions in the sidearm of a small reservoir
4. Intermittent convection
5. Convective circulation in littoral water due to surface cooling
Cited by
39 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献