Melting of wall-mounted ice in shear flow

IF 2.9 3区 综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES
Ellen M. Jolley, Thuy Duong Dang, Frank T. Smith
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引用次数: 0

Abstract

The melting of wall-mounted ice deep inside a water layer flow is investigated, the ice being initially in the form of a slender hump or step-up and the oncoming water upstream near the wall being warmer than the ice. The wall is at the same temperature as the oncoming water except beneath the ice where the wall temperature is the same as that of the ice. The unsteady interaction of the flow, heat transfer and phase change is studied analytically and computationally for a basic pure-ice model in two spatial dimensions at high flow rates. In-flow predictions of ice-shape evolution are presented along with the complete melting times and the vanishing points where melting is completed on the solid surface. This is for a range of initial conditions and background heat transfers. The unsteady movement of the contact points at the edges of the ice formation is determined explicitly for the cases of humps and steps, together with the ultimate behaviours of both the ice humps and the ice steps. Effects of reducing the sub-ice wall temperature and accretion leading to flow separation are also discussed.

壁挂冰在剪切流中融化
研究了水层流深处壁挂冰的融化问题,冰最初呈细长的驼峰或台阶状,壁附近上游来水的温度高于冰的温度。除了冰下,壁的温度与来水的温度相同。在高流速条件下,通过分析和计算研究了基本纯冰模型在两个空间维度上的流动、传热和相变的非稳态相互作用。对冰形状演变的流内预测、完全熔化时间以及固体表面完全熔化的消失点进行了介绍。这适用于一系列初始条件和背景传热。针对驼峰和台阶情况,明确确定了冰层边缘接触点的非稳定运动,以及冰驼峰和冰台阶的最终行为。此外,还讨论了降低冰下壁温度的影响以及导致流体分离的增积。
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来源期刊
CiteScore
6.40
自引率
5.70%
发文量
227
审稿时长
3.0 months
期刊介绍: Proceedings A has an illustrious history of publishing pioneering and influential research articles across the entire range of the physical and mathematical sciences. These have included Maxwell"s electromagnetic theory, the Braggs" first account of X-ray crystallography, Dirac"s relativistic theory of the electron, and Watson and Crick"s detailed description of the structure of DNA.
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