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International Journal of Energy for a Clean Environment
SJR: 0.195 SNIP: 0.435 CiteScore™: 0.74

ISSN Imprimer: 2150-3621
ISSN En ligne: 2150-363X

International Journal of Energy for a Clean Environment

Précédemment connu sous le nom Clean Air: International Journal on Energy for a Clean Environment

DOI: 10.1615/InterJEnerCleanEnv.2015015667
pages 171-182

MEASUREMENT OF THE DYNAMIC CONTACT ANGLE ON A SURFACE COATED WITH NANOPARTICLES FOR IMPROVING THE BOILING CRISIS MODEL

Yury A. Kuzma-Kichta
Moscow Power Engineering Institute Moscow, Russia
Aleksandr Lavrikov
Skolkovo Institute of Science and Technology, Russia
Mikhail Shustov
National Research University Moscow Power Engineering Institute , Russia
A. Ustinov
Skolkovo Institute of Science and Technology, Russia
J. Bialek
Skolkovo Institute of Science and Technology, Russia

RÉSUMÉ

According to some models, the critical heat flux (CHF) depends much on the wettability of the heating surface. A thin layer of nanoparticles deposited on the surface can change the wettability and the CHF too. In this case, it is possible to predict only the direction of the change in the static contact angle, but it is too difficult to calculate the exact value of the static angle. The determination of dynamic contact angles is even more complicated. The process of dry spot formation and rewetting during the boiling crisis is very rapid. The values of advancing and receding contact angles are needed for improving the CHF model. The improved values of the dynamic contact angles can be used in developing a boiling crisis model, since the processes of dry spot growth and rewetting proceed very rapidly.
The present investigation is aimed at studying the contact angle on surfaces with artificial layers of nanoparticles. Experiments were carried out to measure both the static and dynamic contact angles. The second part of the paper is devoted to the evaluation of the durability of nanoparticles coating in boiling and rewetting of dry spots.


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