Library Subscription: Guest
Begell Digital Portal Begell Digital Library eBooks Journals References & Proceedings Research Collections
Heat Pipe Science and Technology, An International Journal

ISSN Print: 2151-7975
ISSN Online: 2151-7991

Archives: Volume 1, 2010 to Volume 8, 2017

Heat Pipe Science and Technology, An International Journal

DOI: 10.1615/HeatPipeScieTech.v5.i1-4.60
pages 87-93

THERMALLY INDUCED TWO-PHASE OSCILLATING FLOW IN A CAPILLARY TUBE: EXPERIMENTAL INVESTIGATIONS

Manoj Rao
Université de Lyon, CNRS, France; INSA-Lyon, CETHIL, UMR5008, F-69621, Villeurbanne, France; Université Lyon 1, UMR5008, CETHIL, F-69622, France
Frederic Lefevre
University Lyon, CNRS, INSA-Lyon, CETHIL UMR5008, F-69621, Villeurbanne, France
Jocelyn Bonjour
University Lyon, CNRS, INSA-Lyon, CETHIL UMR5008, F-69621, Villeurbanne, France
Sameer Khandekar
Department of Mechanical Engineering, Indian Institute of Technology Kanpur, Kanpur (UP) 208016, India

ABSTRACT

This paper deals with thermally-induced oscillations of a meniscus in a two-phase system consisting of a liquid plug and a vapor bubble in a capillary tube of circular cross-section. The tube is heated and cooled down at both extremities. This system represents the simplest version of a pulsating heat pipe (PHP). An experimental setup, made as entirely transparent to enable observations, has been used to visualize the meniscus oscillations. The measurement of pressure is synchronized with the high-speed video recording of the meniscus movement. It is also possible to observe the thin film that is let on the wall when the meniscus moves from its top-most position in the evaporator towards the condenser. When the temperature difference increases between the heat source and the heat sink, different oscillation shapes can be observed and all of them are regular repeatable oscillations. The experimental results clearly show that evaporation of the thin film is responsible for the oscillation patterns that are observed experimentally.


Articles with similar content:

ON THE RELEVANCE OF LOCAL IR VISUALIZATION ON TUBE WALLS OF PULSATING HEAT PIPES: A MODELING INVESTIGATION
Heat Pipe Science and Technology, An International Journal, Vol.5, 2014, issue 1-4
N. Chauris, J-F. Bonnenfant, Cyril Romestant, Yves Bertin, Vincent Ayel
Resonance phenomena at complete vapour condensation in a cooled pipe
International Heat Transfer Conference 12, Vol.42, 2002, issue
Nikolay A. Pribaturin, Maksim V. Alekseev, Vladimir A. Fedorov
INFRARED THERMOGRAPHY OF A CLOSED LOOP PULSATING HEAT PIPE
Heat Pipe Science and Technology, An International Journal, Vol.5, 2014, issue 1-4
Sameer Khandekar, V. K. Karthikeyan, B. C. Pillai
OBSERVATIONS OF THE ARC SPOT ON THE ELECTRIC ARC CATHODE SURFACE
Progress in Plasma Processing of Materials, 1997, Vol.1, 1997, issue
J. Chapelle, Stephane Pellerin, J.-M. Cormier, B. Pokrzywka, K. Musiol
Natural Convection around a Pulsating Line Heat Source
International Heat Transfer Conference 15, Vol.32, 2014, issue
Yann Fraigneau, Gérard Defresne, Marie-Christine Duluc, Mojtaba Jarrahi