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Memorias de investigación
Communications at congresses:
Interplay between phase separation and surface deformations in thin films
Year:2010
Research Areas
  • Aeronautical engineering
Information
Abstract
Films of polymer blends are used in technological applications such as coatings or structured functional layers. The evolution of those films is involved by the coupling of phase separation within the film and surface deformations. We developed a model for films of binary mixtures [1], such as polymer blends, with free evolving surfaces. The model is based on model-H describing the coupled transport of concentration and momentum fields supplemented by boundary conditions at the substrate and free surface. We use the model to analyze the stability of vertically stratified base states of free surface films and the influence of composition in the shape of the films. For purely diffusive transport, an increase in film thickness either exponentially decreases the lateral instability or entirely stabilizes the film. The inclusion of convective transport leads to further destabilization as compared to the purely diffusive case [2]. In addition, we discuss the role of composition for off-critical mixtures on surface deflections. \\[4pt] [1] U. Thiele, S. Madruga, and L. Frastia. Phys. of Fluids. 19, 122106, (2007).\\[0pt] [2] S. Madruga and U. Thiele. Phys. of Fluids. 21, 062104, (2009).
International
Si
Congress
The 63rd Annual Meeting of the American Physical Society¿s Division of Fluid Dynamics
960
Place
Long Beach, USA
Reviewers
Si
ISBN/ISSN
0003-0503
Start Date
21/11/2010
End Date
23/11/2010
From page
203
To page
203
Interplay between phase separation and surface deformations in thin films
Participants
  • Autor: Santiago Madruga Sanchez (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Dinámica y estabilidad no lineal en ingeniería aeroespacial
S2i 2019 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
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