Buoyancy-thermocapillary convection of volatile fluids under atmospheric conditions

Qin, Tongran and Tuković, Željko and Grigoriev, Roman O. (2014) Buoyancy-thermocapillary convection of volatile fluids under atmospheric conditions. = Buoyancy-thermocapillary convection of volatile fluids under atmospheric conditions. International Journal of Heat and Mass Transfer, 75. pp. 284-301. ISSN 0017-9310. Vrsta rada: ["eprint_fieldopt_article_type_article" not defined]. Kvartili JCR: Q1 (2013). Točan broj autora: 3.

Full text not available from this repository.
Official URL: http://www.sciencedirect.com/science/article/pii/S...


Convection in a layer of fluid with a free surface due to a combination of thermocapillary stresses and buoyancy is one of the classic problems of fluid mechanics. Although extensively studied, it is still not fully understood. In particular, neither the effect of phase change nor the thermal boundary conditions at the liquid-vapor interface have been properly described. These two intimately related issues have a significant impact on the stability of the flow and transitions between different convective patterns. The objective of this paper is to develop and validate a comprehensive numerical model which properly describes both heat transfer and phase change at the liquid-vapor interface, as well as the transport of heat and vapor in the gas layer, which is ignored by the vast majority of theoretical studies with minimal justification. We present a numerical investigation of convection in a long cell filled with a volatile fluid and air, and investigate the changes in convective patterns due to with changes in the applied horizontal temperature gradient. We also explore how variations in the wetting properties of the fluid and lateral confinement (three-dimensionality) affect the flow. While the numerical results have been found to be in general agreement with existing experimental observations, we have also discovered an unexpected phenomenon: a region of evaporation near the cold wall and a region of condensation near the hot wall. © 2014 Elsevier B.V. All rights reserved.

Item Type: Article (["eprint_fieldopt_article_type_article" not defined])
Keywords (Croatian): Air; Buoyancy; Computer simulation; Heat convection; Numerical models; Two phase flow; Vapors; Two phase flow; Flow instabilities; Free-surface flow; Horizontal temperature gradient; Liquid-vapor interface; Numerical investigations; Phase Change; Thermal boundary conditions; Thermocapillarity; Marangoni convection; Thermocapillary convection; Phase interfaces; Computer simulation
Subjects: TECHNICAL SCIENCE > Mechanical Engineering
Divisions: 500 Department of Energy, Power Engineering and Environment > 530 Chair of Turbomachinery
Indexed in Web of Science: Yes
Indexed in Current Contents: Yes
Quartiles: Q1 (2013)
Date Deposited: 25 May 2015 13:35
Last Modified: 30 Aug 2017 10:35
URI: http://repozitorij.fsb.hr/id/eprint/4287

Actions (login required)

View Item View Item