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Title: Experiments in a rotating Hele-Shaw cell
Author: Carrillo Galdó, Lluís
Magdaleno Escar, Francesc Xavier
Casademunt i Viader, Jaume
Ortín, Jordi, 1959-
Keywords: Dinàmica de fluids
Química de superfícies
Fluid dynamics
Surface chemistry
Issue Date: 1996
Publisher: The American Physical Society
Abstract: We introduce a modification to Hele-Shaw flows consisting of a rotating cell. A viscous fluid (oil) is injected at the rotation axis of the cell, which is open to air. The morphological instability of the oil-air interface is thus driven by centrifugal force and is controlled by the density (not viscosity) difference. We derive the linear dispersion relation and verify the maximum growth rate selection of initial patterns within experimental uncertainty. The nonlinear growth regime is studied in the case of vanishing injection rate. Several characteristic lengths are studied to quantify the patterns obtained. Experimental data exhibit good collapse for two characteristic lengths, namely, the radius of gyration and the radial finger length, which in the nonlinear regime appear to grow linearly in time.
Note: Reproducció del document publicat a: Http:// 10.1103/PhysRevE.54.6260
It is part of: Physical Review E, 1996, vol. 54, núm. 6, p. 6260-6267
ISSN: 1063-651X
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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