Thermohydrodynamics of boiling in a van der Waals fluid
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Journal Title
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School of Science |
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2012
Major/Subject
Mcode
Degree programme
Language
en
Pages
026320/1-15
Series
Physical Review E, Volume 85, Issue 2
Abstract
We present a modeling approach that enables numerical simulations of a boiling Van der Waals fluid based on the diffuse interface description. A boundary condition is implemented that allows in and out flux of mass at constant external pressure. In addition, a boundary condition for controlled wetting properties of the boiling surface is also proposed. We present isothermal verification cases for each element of our modeling approach. By using these two boundary conditions we are able to numerically access a system that contains the essential physics of the boiling process at microscopic scales. Evolution of bubbles under film boiling and nucleate boiling conditions are observed by varying boiling surface wettability. We observe flow patters around the three-phase contact line where the phase change is greatest. For a hydrophilic boiling surface, a complex flow pattern consistent with vapor recoil theory is observed.Description
Keywords
hydrodynamics, boiling, phase transition, numerical simulations, fluids
Citation
Laurila, T. & Carlson, A. & Do-Quang, M. & Ala-Nissilä, Tapio & Amberg, G. 2012. Thermohydrodynamics of boiling in a van der Waals fluid. Physical Review E. Volume 85, Issue 2. P. 026320/1-15. ISSN 1539-3755 (printed). DOI: 10.1103/physreve.85.026320.
