Experimental and numerical studies of the pulsating heat pipe stopover regime

被引：0

作者：

Abela, Mauro ^{[1
,2
]}

Mameli, Mauro ^{[2
]}

Filippeschi, Sauro ^{[2
]}

Nikolayev, Vadim S. ^{[1
]}

机构：

[1] Université Paris-Saclay, CEA, SPEC, CNRS, Gif-sur-Yvette Cedex

[2] Department of Energy, Systems Land and Construction Engineering, University of Pisa, Largo L. Lazzarino, Pisa

来源：

International Journal of Heat and Mass Transfer | 2025年 / 247卷

关键词：

Dominant frequency; Pulsating heat pipe; Simulation; Stopover regime; Thermal resistance;

D O I：

10.1016/j.ijheatmasstransfer.2025.127102

中图分类号：

学科分类号：

摘要：

The experimental data previously obtained with a “Smart loop” (Abela et al. 2024) configured as an eleven-turn pulsating heat pipe (PHP) are compared here to simulation results obtained with the in house 1D transient code CASCO (French acronym for Code Avancé de Simulation du Caloduc Oscillant: Advanced PHP Simulation Code in English) version 4. CASCO has been set-up in terms of geometry, topology, material properties and thermal boundary conditions to mimic the experimental device. A comparison between numerical and experimental results is performed simultaneously on multiple parameters. First, we compare the overall heat transfer performance with a good agreement. Then we discuss the temporal evolution of fluid temperature and pressure at fixed locations. The stopover regime is deeply investigated. It is found that it is characterized by a repeating sequence of fast pressure growth (corresponding to oscillations) followed by a slower pressure decay (corresponding to PHP stopover). The dominant frequency was computed both for experimental and simulation data; an agreement was found. Similarly, the experimental and simulation data on the pressure decay rate agree. The decrease of the PHP thermal resistance with heating load is explained by a decrease of the stopover time caused by a larger pressure decay rate appearing because of a faster liquid film drying. © 2025 The Authors

引用

共 24 条

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