Boiling of small droplets |
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| Authors: | M.L. Roesle F.A. Kulacki |
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| Affiliation: | 1. Institute of Technical Thermodynamics, Technische Universität Darmstadt, Petersenstr. 17, 64287 Darmstadt, Germany;2. Center of Smart Interfaces, Technische Universität Darmstadt, Petersenstr. 17, 64287 Darmstadt, Germany;1. Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China;2. Purdue University Boiling and Two-Phase Flow Laboratory (PU-BTPFL), School of Mechanical Engineering, 585 Purdue Mall, West Lafayette, IN 47907, USA;1. Department of Mathematics, Southern Methodist University, Dallas, TX 75275, USA;2. Institute of Thermophysics, Russian Academy of Sciences, Novosibirsk 630090, Russia;3. Institute of Power Engineering, National Tomsk Polytechnic Research University, Tomsk 634050, Russia |
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| Abstract: | Analysis is reported of the boiling of small diameter suspended droplets, such as found in emulsions. A one-dimensional model considers both the energy and momentum equations, and effects of differences in fluid and thermodynamic properties between the droplet and the surrounding liquid are examined. Results are presented in the form of time varying bubble radius and temperature. The initial boiling of the droplet is insensitive to the surrounding liquid and droplet diameter, while the final evaporation rate is strongly affected by the properties of the surrounding liquid. After a droplet has completely evaporated, the vapor bubble expands and contracts via radial oscillations near the Minnaert frequency for isothermal bubbles. Thermal damping is observed but the model does not capture acoustic damping. |
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