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Article | REF: BE9545 V1

Two-phase systems of thermal control

Authors: Jocelyn BONJOUR, Frédéric LEFÈVRE, Valérie SARTRE, Yves BERTIN, Cyril ROMESTANT, Vincent AYEL, Vincent PLATEL

Publication date: October 10, 2010, Review date: June 4, 2017

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2. Capillary heat pipes

In the case of a capillary heat pipe, the capillary network can take a variety of forms (sintered, fabric layers or metal film mats, axial or circumferential grooves, etc.). These different network geometries generate a capillary pressure (p cap ) of varying magnitude, the value of which is given by the Laplace-Young equation:

pcap=pv−pl=σ(1rI+1rII)
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