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

Результат исследования: Научные публикации в периодических изданияхстатья по материалам конференциирецензирование

Аннотация

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.

Язык оригиналаанглийский
Номер статьи012085
ЖурналJournal of Physics: Conference Series
Том1677
Номер выпуска1
DOI
СостояниеОпубликовано - 3 дек 2020
Событие36th Siberian Thermophysical Seminar, STS 2020 - Novosibirsk, Российская Федерация
Продолжительность: 5 окт 20207 окт 2020

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