Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/102850
Title: Deformation of uid fronts in a gap-modulated Hele-Shaw cell
Author: Díaz Piola, Lautaro
Director: Ortín, Jordi, 1959-
Planet Latorre, Ramon
Keywords: Dinàmica de fluids
Tesis
Fluid dynamics
Theses
Issue Date: Jun-2016
Abstract: We have studied experimentally the morphology and dynamics of stable oil-air displacements in a gap-modulated Hele-Shaw cell, in the case where the modulation is persistent in the direction of front advancement. Local changes in capillary pressure result in non-local deformations of the two-phase fronts, which have been recorded with a high speed camera and digitized in space and time. The front morphologies observed experimentally in the steady state are in excellent agreement with the predictions of a linear theory, particularly for low intensities of the gap modulation and for both positive and negative modulations. We have also studied the spatio-temporal dynamics of deformation of a nearly initially at front towards the steady state. In the presence of a positive modulation of the gap thickness, the difference in height between the front tip at the central modulation of the cell and its lateral tails accelerates in time
Note: Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Curs: 2016, Tutors: Jordi Ortín i Ramon Planet
URI: http://hdl.handle.net/2445/102850
Appears in Collections:Treballs Finals de Grau (TFG) - Física

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