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首页> 外文期刊>International Journal of Heat and Mass Transfer >Nu-Ra-Fo correlations for transient free convection in 2D convective diode cavities with discrete heat sources
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Nu-Ra-Fo correlations for transient free convection in 2D convective diode cavities with discrete heat sources

机译：具有离散热源的二维对流二极管腔中的瞬时自由对流的Nu-Ra-Fo相关性

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摘要

This work allows to quantify the transient natural-convection heat transfer taking place in air-filled convective diode cavities. The results are presented in terms of Nusselt-Rayleigh-Fourier numbers correlations. They are valid for the specific configuration of the hot wall that consists of three horizontal, isothermal discrete bands separated by two adiabatic ones of the same dimensions. The channel that connects the hot and cold walls is adiabatic and is inclined between -60° and +60° with respect to the horizontal. The correlations proposed are obtained from numerical results based on the finite volume method and are validated by measurements. They complement those obtained in a previous work for steady state and Rayleigh number in the range 1.84×10~5 ≤ Ra ≤ 1.70×10~9, which make them suitable for applications in several industrial sectors.
机译：这项工作可以量化在空气对流二极管腔中发生的瞬态自然对流传热。结果以Nusselt-Rayleigh-Fourier数相关性表示。它们对于热壁的特定配置有效，该壁由三个水平的，等温的离散带组成，并由两个相同尺寸的绝热带隔开。连接冷热壁的通道是绝热的，相对于水平面倾斜-60°至+ 60°。所提出的相关性是基于有限体积法从数值结果中获得的，并通过测量进行了验证。它们是对先前工作中获得的稳态值和瑞利数在1.84×10〜5≤Ra≤1.70×10〜9范围内的结果的补充，使其适用于多个工业领域。

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