Title: Pulsating Heat Pipes: Basics of Functioning and Modeling
Abstract: Encyclopedia of Two-Phase Heat Transfer and Flow IV, pp. 63-139 (2018) No AccessChapter 2: Pulsating Heat Pipes: Basics of Functioning and ModelingVadim S. Nikolayev and Marco MarengoVadim S. NikolayevService de Physique de l'État Condensé, CEA, CNRS, Université Paris-Saclay, CEA Saclay, 91191 Gif-sur-Yvette Cedex, France and Marco MarengoSchool of Computing, Engineering and Mathematics, University of Brighton, Lewes Road, BN2 4GJ Brighton, UKhttps://doi.org/10.1142/9789813234406_0002Cited by:7 PreviousNext AboutSectionsPDF/EPUB ToolsAdd to favoritesDownload CitationsTrack CitationsRecommend to Library ShareShare onFacebookTwitterLinked InRedditEmail Abstract: For cooling of electronic or electric equipment, there is a growing industrial demand of high-performance thermal links. One such thermal device is the recently invented pulsating (called also oscillating) heat pipe (PHP). It consists of a closed capillary tube folded into meander and partially filled with a liquid. One side of the meander is in thermal contact with a hot spot, the other with a cold spot. The oscillation of the liquid plugs and vapor bubbles spontaneously occurs after the start of heating by the action of evaporation/condensation at the menisci. The plugs move between hot and cold areas by creating an efficient convective heat exchange. This advantage and also the simplicity of PHP make it highly competitive with respect to other kinds of heat pipes. However, the PHP functioning is non-stationary and depends on a large number of physical and material parameters. As a result, application of empirical correlations is quite unsuccessful, and more sophisticated theoretical and basic experimental studies are necessary. In this chapter, we present the current level of understanding and existing approaches to the PHP modeling and design. We start by describing the basic experiments with the simplest, single-branch PHP that contains only one bubble–plug couple. We show how the results of these experiments help to understand the PHP functioning and introduce the reader to the theoretical and numerical approaches to the PHP modeling by describing the relevant physical phenomena. Finally, we review the state-of-the-art of modeling of the multi-branch PHP. This chapter is complementary to the review of the experimental work on multi-branch PHPs presented in Chapter 1. FiguresReferencesRelatedDetailsCited By 7Pulsating Heat Pipe Fin Plates for Enhancing Natural and Forced Convection Cooling of Electronics: Experimental CampaignGautier Rouaze, Jackson B. Marcinichen, John R. Thome, Kangning Xiong and L. Winston Zhang31 May 2022Innovations in pulsating heat pipes: From origins to future perspectivesMauro Mameli, Giorgio Besagni, Pradeep K. Bansal and Christos N. Markides1 Feb 2022 | Applied Thermal Engineering, Vol. 203Flat plate pulsating heat pipes: A review on the thermohydraulic principles, thermal performances and open issuesVincent Ayel, Maksym Slobodeniuk, Rémi Bertossi, Cyril Romestant and Yves Bertin1 Oct 2021 | Applied Thermal Engineering, Vol. 197Simulation and experimental validation of pulsating heat pipesGautier Rouaze, Jackson B. Marcinichen, Filippo Cataldo, Philippe Aubin and John R. Thome1 Sep 2021 | Applied Thermal Engineering, Vol. 196Accelerating Taylor bubbles within circular capillary channels: Break-up mechanisms and regimesManolia Andredaki, Anastasios Georgoulas, Nicolas Miché and Marco Marengo1 Jan 2021 | International Journal of Multiphase Flow, Vol. 134Start-up in microgravity and local thermodynamic states of a hybrid loop thermosyphon/pulsating heat pipeMauro Mameli, Andrea Catarsi, Daniele Mangini, Luca Pietrasanta and Nicholas Michè et al.1 Jul 2019 | Applied Thermal Engineering, Vol. 158Pulsating Heat Pipe Simulations: Impact of PHP OrientationIaroslav Nekrashevych and Vadim S. Nikolayev19 February 2019 | Microgravity Science and Technology, Vol. 31, No. 3 Encyclopedia of Two-Phase Heat Transfer and Flow IVMetrics History PDF download