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Memorias de investigación
Communications at congresses:
Hydrodynamic analysis of the oscillating barriers experiment in a Langmuir trough
Year:2015
Research Areas
  • Aeronautical engineering
Information
Abstract
A theory is provided for a common experimental set up that is used to measure surface properties in surfactant monolayers. The set up consists in a shallow liquid layer that is compressed/expanded in a periodic fashion by moving two parallel, slightly immersed solid barriers, which vary the free surface area and thus the surfactant concentration. The simplest theory ignores the uid dynamics in the bulk fluid, assuming spatially uniform surfactant concentration, which requires quite small forcing frequencies and provides reversible dynamics in the compression/expansion cycles. In this article, we present a long wave theory for not so slow oscillations that assumes local equilibrium but takes the uid dynamics into account. In particular, this theory uncovers the physical mechanisms involved in the surfactant behavior and allows for extracting more information from each experimental run. The conclusion is that the fluid dynamics cannot be ignored, and that some irreversible dynamics could well have a fluid dynamics origin.
International
Si
Congress
CoWet Summer School 2015
960
Place
Madrid
Reviewers
Si
ISBN/ISSN
00000000
Start Date
31/08/2015
End Date
04/09/2015
From page
1
To page
1
Proceedings of CoWet Summer School 2015
Participants
  • Autor: Maria Jesus Higuera Torron (UPM)
  • Autor: Jose Manuel Perales Perales (UPM)
  • Autor: Jose Manuel Vega De Prada (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Dinámica y estabilidad no lineal en ingeniería aeroespacial
  • Departamento: Matemática Aplicada a la Ingeniería Aeroespacial
  • Departamento: Aeronaves y Vehículos Espaciales
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