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Microlayer dynamics during the growth process of a single vapour bubble under subcooled flow boiling conditions.

Authors :
Sinha, Gulshan Kumar
Narayan, Surya
Srivastava, Atul
Source :
Journal of Fluid Mechanics; 1/25/2022, Vol. 931, p1-36, 36p
Publication Year :
2022

Abstract

In view of this, an ensemble average of the single-phase (bulk liquid under subcooled conditions) velocity field has been estimated and the corresponding convective time scales at different stages of the bubble growth process have been quantified by measuring the absolute fluid velocity at a height that corresponds to the diameter of the vapour bubble (apex of the vapour bubble). Thus, the initial growth of the vapour bubble, for I t i Graph $\lesssim$ 0.3 ms, is predominantly governed by the pressure difference (inertia-driven) and evaporation of the superheated liquid layer enveloping the nucleating vapour bubble (diffusion-controlled growth). During this time period, the liquid layer entrapped pushes the vapour bubble upwards and enables the vapour bubble to hover over the heated substrate, as observed after the detachment of the vapour bubble in figure 11( I b i ). Keywords: boiling; bubble dynamics EN boiling bubble dynamics 1 36 36 12/29/21 20220125 NES 220125 1. [Extracted from the article]

Details

Language :
English
ISSN :
00221120
Volume :
931
Database :
Complementary Index
Journal :
Journal of Fluid Mechanics
Publication Type :
Academic Journal
Accession number :
154376919
Full Text :
https://doi.org/10.1017/jfm.2021.958