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Numerical study of melting of a phase change material (PCM) enhanced by deformation of a liquid-gas interface
| Title: | Numerical study of melting of a phase change material (PCM) enhanced by deformation of a liquid-gas interface |
| Authors: | Kim, Yangkyun Browse this author | | Hossain, Akter Browse this author | | Nakamura, Yuji Browse this author →KAKEN DB |
| Keywords: | Free surface moving | | Enthalpy-Porosity method | | Melting | | Numerical modeling | | Volume of Fluid (VOF) |
| Issue Date: | Aug-2013 |
| Publisher: | Pergamon-Elsevier Science Ltd |
| Journal Title: | International Journal of Heat and Mass Transfer |
| Volume: | 63 |
| Start Page: | 101 |
| End Page: | 112 |
| Publisher DOI: | 10.1016/j.ijheatmasstransfer.2013.03.052 |
| Abstract: | Numerical simulations are performed in order to examine the time-dependent melting, and heavily deforming processes of phase change material (PCM) subjected to local heating. By comparing cases with and without deformation, the impact of the inclusion of a deformation model is firstly addressed to understand what influences the precise melting behavior. Mass, momentum and energy conservation equations are solved in a 2-D system based on a fixed grid by means of a finite volume method. The Volume of Fluid (VOF) method and the Enthalpy-Porosity method are applied to model the deformable liquid-gas interface and the melting processes, respectively. Results successfully show the melting, subsequent deformation and dropping-off behavior of the molten PCM. It is found that the inclusion of the deformation model enhances the melting owing to the increase of the total received heat; namely, widening of the contact area at the melting front and induced flow motion inside molten PCM improve the heat transfer toward the melting front. Parametric studies by varying the applied Stefan number so as to change the surface tension are also made to ensure the above-mentioned enhancement mechanism is universally applicable. (C) 2013 Elsevier Ltd. All rights reserved. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/53092 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 中村 祐二
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