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TFG_ FIS_Diaz_Piola_Lautaro.pdf (450.08 KB)

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Bachelor thesis

Publication date

2016-06

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cc-by-nc-nd (c) Díaz, 2016
Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/102850

Deformation of uid fronts in a gap-modulated Hele-Shaw cell

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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

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Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Curs: 2016, Tutors: Jordi Ortín i Ramon Planet

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Dinàmica de fluids, Treballs de fi de grau

Subject (English)

Fluid dynamics, Bachelor's theses

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Treballs Finals de Grau (TFG) - Física

Citation

DÍAZ PIOLA, Lautaro. Deformation of  uid fronts in a gap-modulated Hele-Shaw cell. [consulted: 12 of June of 2026]. Available at: https://hdl.handle.net/2445/102850

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