Purpose

The purpose of this study is to quantify the free convective heat transfer around a vertical cylindrical electronic component equipped with vertical fins representing an antenna, contained in a closed cavity maintained isothermal. Its cooling is provided via a water-based copper nanofluid whose volume fraction varies between 0% and 10%. Its effective viscosity and thermal conductivity are determined with the Brinkman and Maxwell models.

Design/methodology/approach

The governing equation system has been solved by means of the volume control method based on the SIMPLE algorithm.

Findings

A Nusselt-Rayleigh correlation valid in the 3.32 × 10⁵ – 6.74 × 10⁷ Rayleigh number range is proposed. It allows the thermal sizing of the considered system used in high power electronics to ensure their correct operation in the worst conditions.

Originality/value

The proposed correlations are original and unpublished.

中文翻译：

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带有翅片的垂直圆柱形电子元件周围的水铜纳米流体自然对流

目的

本研究的目的是量化垂直圆柱形电子元件周围的自由对流热传递，该电子元件配备有代表天线的垂直翅片，包含在保持等温的封闭腔中。它的冷却是通过体积分数在 0% 和 10% 之间变化的水基铜纳米流体提供的。其有效粘度和热导率由 Brinkman 和 Maxwell 模型确定。

设计/方法/方法

控制方程组采用基于 SIMPLE 算法的体积控制方法求解。

发现

^{提出了在 3.32 × 10 5} – 6.74 × 10 ⁷瑞利数范围内有效的 Nusselt-Rayleigh 相关性。它允许对大功率电子设备中使用的所考虑系统进行热选型，以确保它们在最坏的条件下正确运行。

原创性/价值

建议的相关性是原创的且未发表。