A computational model for the transient analysis of flat heat pipes

ITHERM 2000. The Seventh Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems (Cat. No.00CH37069) Pub Date : 2000-05-23 DOI:10.1109/ITHERM.2000.866178

C. Sobhan, S. Garimella, V. Unnikrishnan

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引用次数: 19

Abstract

A computational model is developed for the analysis of the transient operation of a flat heat pipe. The analysis involves the solution of the two-dimensional continuity, momentum and energy equations coupled with the state equation in the vapor core, the transport equations for a porous medium in the wick, and the two-dimensional heat conduction equation in the heat pipe wall. The equations are discretized and solved using a finite-difference approach. Variations in the temperature, pressure and velocity fields are obtained as a function of time. The effect of the axial conduction through the heat pipe wall and wick, which causes heat to flow into the interior in the externally adiabatic section, thus affecting the velocity distributions in the wick and vapor, is brought out in the present analysis. The heat removal capability of the heat pipe is contrasted to that of a solid copper block of the same overall dimensions as the heat pipe, and a copper plate with dimensions equivalent to those of the heat pipe wall.

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平板热管瞬态分析的计算模型

建立了平板热管瞬态运行分析的计算模型。分析了汽芯内与状态方程耦合的二维连续性、动量和能量方程、芯内多孔介质的输运方程和热管壁内二维热传导方程的解。将方程离散化，用有限差分法求解。得到了温度场、压力场和速度场随时间的变化。分析了通过热管壁和热芯的轴向传导作用，使热量在外绝热段流入内部，从而影响了热管壁和热芯内的速度分布。将热管的散热能力与与热管外形尺寸相同的实心铜块和与热管壁尺寸相等的铜板进行对比。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ITHERM 2000. The Seventh Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems (Cat. No.00CH37069)

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