Unsteady heat transfer performance of heat pipe with axially swallow-tailed microgrooves

3rd International Conference on Energy Materials and Environment Engineering

能源学;生态环境科学

Zhang, R.P.^1

School of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen Jiangxi

333001, China^1

关键词: Convective heat transfer;    Interfacial phase;    Interfacial shear stress;    Non linear control;    Numerical results;    Transient heat transfer;    Unsteady heat transfer;    Wall temperatures;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/61/1/012003/pdf
DOI  :  10.1088/1755-1315/61/1/012003

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

A mathematical model is developed for predicting the transient heat transfer and fluid flow of heat pipe with axially swallow-tailed microgrooves. The effects of liquid convective heat transfer in the microgrooves, liquid-vapor interfacial phase-change heat transfer and liquid-vapor interfacial shear stress are accounted for in the present model. The coupled non-linear control equations are solved numerically. Mass flow rate at the interface is obtained from the application of kinetic theory. Time variation of wall temperature is studied from the initial startup to steady state. The numerical results are verified by experiments. Time constants for startup and shutdown operation are defined to determine how fast a heat pipe responds to an applied input heat flux, which slightly decreases with increasing heat load.