Lattice Boltzmann simulation of bubble evolution at boiling on surfaces with different wettability

A. V. Fedoseev, A. S. Surtaev, M. I. Moiseev, A. E. Ostapchenko

Research output: Contribution to journalConference articlepeer-review

Abstract

The hybrid Lattice Boltzmann method is adopted for a detailed study of surface wettability effects on evolution of vapor bubbles and temperature field of heat exchange surface at boiling. The simulation results show that the bubble departure diameter increases with an increase of static contact angle, and its value normalized by the capillary length approaches 3 for superlyophobic surface. In the range of contact angles of 110 - 129 the size of the dry area bounded by triple contact line greatly increases compared to the bubble departure diameter. At contact angles θ 153 the dry area does not shrink even at the bubble departure stage and the typical film boiling regime is observed. It has been shown that the deterioration of wettability affects the evolution of the temperature field beneath the bubble, which leads to a significant change in the local heat transfer rate.

Original languageEnglish
Article number012085
JournalJournal of Physics: Conference Series
Volume1677
Issue number1
DOIs
Publication statusPublished - 3 Dec 2020
Event36th Siberian Thermophysical Seminar, STS 2020 - Novosibirsk, Russian Federation
Duration: 5 Oct 20207 Oct 2020

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