Nonlinear Dynamics in experimental devices with compressed/expanded surfactant monolayers

Higuera, María and Perales Perales, José Manuel and Vega de Prada, José Manuel (2013). Nonlinear Dynamics in experimental devices with compressed/expanded surfactant monolayers. "Fluid Dynamics Research", v. 46 (n. 4); pp. 1-13. https://doi.org/10.1088/0169-5983/46/4/041404.

Description

Title: Nonlinear Dynamics in experimental devices with compressed/expanded surfactant monolayers
Author/s:
  • Higuera, María
  • Perales Perales, José Manuel
  • Vega de Prada, José Manuel
Item Type: Article
Event Title: International Conference XXXIII Dynamics Days Europe. Book of abstracts.
Event Dates: 19/05/2013 - 23/05/2013
Event Location: Center for Biomedical Technology, Madrid, Spain.
Título de Revista/Publicación: Fluid Dynamics Research
Date: April 2013
Volume: 46
Subjects:
Faculty: E.T.S.I. Aeronáuticos (UPM)
Department: Fundamentos Matemáticos de la Tecnología Aeronáutica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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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 of a surfactant monolayer (over a shallow liquid layer) that is compressed/expanded in a periodic fashion by moving in counter-phase two parallel, slightly immersed solid barriers, which vary the free surface area and thus the surfactant concentration. The simplest theory ignores the fluid 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 paper, we present a long-wave theory for not so slow oscillations that assumes local equilibrium but takes the fluid dynamics into account. This simple 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 dynamic origin

More information

Item ID: 29966
DC Identifier: http://oa.upm.es/29966/
OAI Identifier: oai:oa.upm.es:29966
DOI: 10.1088/0169-5983/46/4/041404
Official URL: http://iopscience.iop.org/article/10.1088/0169-5983/46/4/041404/
Deposited by: Memoria Investigacion
Deposited on: 13 Apr 2015 17:37
Last Modified: 17 Jan 2017 12:11
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