Discrete models of liquid-vapour phase change phenomena in porous media |
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| Affiliation: | 1. School of Mechanical Engineering, Pusan National University, San 30, Jang Jeon Dong, Geum Jeong Gu, Busan 609-735, Korea;2. Hyundai Heavy Industries, Bangeojin Ring Road 1000, Dong-gu, Ulsan 682-792, Korea;1. School of Energy & Power Engineering, Shandong University, Jinan 250061, Shandong Province, China;2. Mechanical Engineering Station for Doctoral Research, Shandong University, Jinan 250061, Shandong Province, China;3. Department of Energy Engineering, Zhejiang University, Hangzhou 310027, Zhejiang Province, China;1. IN+ - Center for Innovation, Technology and Policy Research, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal;2. ASML Holding N.V, De Run 6501, 5504 DR Veldhoven, the Netherlands;3. CINAMIL, Department of Exact Sciences and Engineering, Portuguese Military Academy, R. Gomes Freire, 203, 1169-203 Lisboa, Portugal;1. School of Mechanical and Electrical, Beijing University of Chemical Technology, Beijing 100029, China;2. Science and Technology on Space Physics Laboratory, Beijing 100076, China;3. Hebei University of Water Resources and Electric Engineering, Cangzhou 061001, China |
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| Abstract: | This survey presents recent developments in the modelling of liquid-vapor phase change phenomena in porous media within the framework of the discrete approach. The pore network (or discrete) approach is first illustrated through the example of the evaporation at low capillary number of a pure liquid from a capillary porous medium. In particular, it is shown that invasion percolation patterns characterise the phase distribution. Then first results concerning the vaporisation of a liquid within the porous wick of a capillary evaporator are presented. These results show that capillary fingering patterns can be expected within the wick. |
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