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首页> 外文期刊>Journal of enhanced heat transfer >FRACTALIZATION OF CONVECTIVE FLOW UPON VERTICAL GROOVED DISC/AIR INTERFACE
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FRACTALIZATION OF CONVECTIVE FLOW UPON VERTICAL GROOVED DISC/AIR INTERFACE

机译：垂直沟槽/空气界面对流流动的分形化

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摘要

This paper addresses the question of how two fractal figures (flow reversal and gravity current) evolve side by side and interact when released in proximity to one another along a vertical grooved heated disc subjected to diverse uniform heat flux type, in the heating rate range of 500-700 W/m(2) (corresponding to the Rayleigh number range of 1.118-1.244 x 10(7)). The troublesome effects of these previous inflow phenomena have been identified through observed decreases and increases in the mean axial temperature and the intensity of temperature fluctuations, respectively, at the mid-disc section. Upon close examination of these measurements, the onset of convective boundary layer separation inevitably results, such as an upward fractal, in order to enhance the heat transfer along the disc. In order to provide further analysis of these singular phenomena, the present study emphasizes the structures hiding behind this fractalization, such as the Lorenz attractor, small-scale structures, and thermal plume/boundary layer collision. Finally, both the shadowgraph technique and image processing with Image) were employed to give a qualitative view of the development of these instabilities and quantitative measurements, respectively.
机译：本文解决了两个分形图（流动反转和重力电流）在沿着经过多样化的均匀热通量类型的垂直沟槽加热盘彼此靠近彼此释放时相互作用的问题。在加热速率范围内500-700 w / m（2）（对应于1.118-1.244 x 10（7）的瑞利数范围）。通过观察到的降低，通过观察到的降低并分别增加了中间盘区段的平均轴向温度和温度波动强度的增加的麻烦的效果。在仔细检查这些测量时，对流边界层分离的发作不可避免地是结果，例如向上分形，以便沿盘增强热传递。为了提供对这些奇异现象的进一步分析，本研究强调了隐藏在该分数化后面的结构，例如Lorenz吸引子，小规模结构和热羽毛/边界层碰撞。最后，采用了影子图技术和图像处理的图像处理，以便分别提供这些不稳定性和定量测量的发展的定性视图。

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