New foams: Fresh challenges and opportunities |
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| Institution: | 1. Université Paris-Est Marne la Vallée, Laboratoire de Physique des Matériaux Divisés et des Interfaces, UMR 8108 du CNRS, 5 Bd Descartes, 77454 Marne-la-Vallée cedex 2, France;2. School of Physics, Trinity College, Dublin 2, Ireland;1. School of Energy and Power Engineering, Northeast Electric Power University, Jilin 132012, China;2. Zhejiang Energy Shaoxing Binhai Thermal Power Plant, Shaoxing 312073, China;1. College of Materials Science and Engineering, Chongqing University, Chongqing 400045, PR China;2. School of Materials Science and Engineering, Southeast University, 211189, PR China;3. University of Jinan, 250022, PR China;1. Department of Energy, Systems, Territory and Constructions Engineering, University of Pisa, Italy;2. Chair for Energy Process Engineering and Conversion Technologies for Renewable Energies, Institute of Energy Engineering, Technische Universität Berlin, Germany;3. BIOENERGY 2020+ GmbH, Graz, Austria;4. Institute of Thermal Engineering, Graz University of Technology, Austria;1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;2. Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China;3. National Engineering Research Center of Distillation Technology, Tianjin 300072, China;4. Zhejiang institute of Tianjin University, Ningbo, Zhejiang 315201, China |
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| Abstract: | Some recent trends in foam research have been directed towards the rapid production of highly monodisperse bubbles, of diameter on a scale around or below 100 μm, with surprising consequences. Such foams remain wet under gravity and order spontaneously and rapidly, forming substantial microcrystals. Previously, ordered foams have resulted only from slow processes of deliberate fabrication, or from the influence of walls in confined geometry. This opens up a wide range of new topics of interest, analogous to those of metallurgy: equilibrium crystal phases, their stability, their defects and interfaces, and phase transitions between them. The ordered structures associated with confined geometries also offer opportunities for microfluidics. Other new kinds of foam incorporate particulate matter, and are intermediate between foam and granular matter. Remarkable properties are beginning to emerge for these as well, including “superstability”, that is, a high degree of stability with respect to both coarsening and rupture. |
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