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Title: | Deformation of uid fronts in a gap-modulated Hele-Shaw cell |
Author: | Díaz Piola, Lautaro |
Director/Tutor: | Ortín, Jordi, 1959- Planet Latorre, Ramon |
Keywords: | Dinàmica de fluids Treballs de fi de grau Fluid dynamics Bachelor's 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 |
Files in This Item:
File | Description | Size | Format | |
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TFG_ FIS_Diaz_Piola_Lautaro.pdf | 450.08 kB | Adobe PDF | View/Open |
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