Front tracking in thin-layer electrodeposition

We present an experimental and theoretical study of front interaction during the growth of patterns in thin-layer electrochemical deposition. Simultaneous schlieren and particle image velocimetry techniques are used to follow front development of concentration fields and convection rolls in gravitoc...

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Detalles Bibliográficos
Autores principales:	Dengra, Silvina, Molina, Fernando Victor
Publicado:	2000
Materias:	Electrodeposition Electrohydrodynamics Ion transport Numerical simulation Pattern formation Thin-layer cells
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00319015_v69_n3_p963_Dengra http://hdl.handle.net/20.500.12110/paper_00319015_v69_n3_p963_Dengra
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_00319015_v69_n3_p963_Dengra
record_format	dspace
spelling	paper:paper_00319015_v69_n3_p963_Dengra2023-06-08T14:58:49Z Front tracking in thin-layer electrodeposition Dengra, Silvina Molina, Fernando Victor Electrodeposition Electrohydrodynamics Ion transport Numerical simulation Pattern formation Thin-layer cells We present an experimental and theoretical study of front interaction during the growth of patterns in thin-layer electrochemical deposition. Simultaneous schlieren and particle image velocimetry techniques are used to follow front development of concentration fields and convection rolls in gravitoconvection prevailing flows. A theoretical model describing full front nonlinear interaction taking into account diffusive, migratory and convective motion of ions in a viscous fluid subject to an electric field is presented. The equations are written in terms of a set of dimensionless numbers showing the significance of the gravity Grashof number in a gravitoconvection prevailing regime. Our experiments reveal that concentration and gravity driven convection fronts which develop near the electrodes coincide and that the two evolve together. Prior to the appearance of rough growth, cathodic and anodic concentration and convective fronts are parallel to the electrodes. After branching develops, the cathodic fronts become slaved to the deposit front, all three growing linearly in time. Our model predicts that, in the parallel flow regime, the convective and concentration fronts coincide, both scaling first as t4/5 and then slowing down to t1/2, as it is observed in our experiments. After branching develops, this behavior applies only to the anodic front. Fil:Dengra, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Molina, F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2000 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00319015_v69_n3_p963_Dengra http://hdl.handle.net/20.500.12110/paper_00319015_v69_n3_p963_Dengra
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Electrodeposition Electrohydrodynamics Ion transport Numerical simulation Pattern formation Thin-layer cells
spellingShingle	Electrodeposition Electrohydrodynamics Ion transport Numerical simulation Pattern formation Thin-layer cells Dengra, Silvina Molina, Fernando Victor Front tracking in thin-layer electrodeposition
topic_facet	Electrodeposition Electrohydrodynamics Ion transport Numerical simulation Pattern formation Thin-layer cells
description	We present an experimental and theoretical study of front interaction during the growth of patterns in thin-layer electrochemical deposition. Simultaneous schlieren and particle image velocimetry techniques are used to follow front development of concentration fields and convection rolls in gravitoconvection prevailing flows. A theoretical model describing full front nonlinear interaction taking into account diffusive, migratory and convective motion of ions in a viscous fluid subject to an electric field is presented. The equations are written in terms of a set of dimensionless numbers showing the significance of the gravity Grashof number in a gravitoconvection prevailing regime. Our experiments reveal that concentration and gravity driven convection fronts which develop near the electrodes coincide and that the two evolve together. Prior to the appearance of rough growth, cathodic and anodic concentration and convective fronts are parallel to the electrodes. After branching develops, the cathodic fronts become slaved to the deposit front, all three growing linearly in time. Our model predicts that, in the parallel flow regime, the convective and concentration fronts coincide, both scaling first as t4/5 and then slowing down to t1/2, as it is observed in our experiments. After branching develops, this behavior applies only to the anodic front.
author	Dengra, Silvina Molina, Fernando Victor
author_facet	Dengra, Silvina Molina, Fernando Victor
author_sort	Dengra, Silvina
title	Front tracking in thin-layer electrodeposition
title_short	Front tracking in thin-layer electrodeposition
title_full	Front tracking in thin-layer electrodeposition
title_fullStr	Front tracking in thin-layer electrodeposition
title_full_unstemmed	Front tracking in thin-layer electrodeposition
title_sort	front tracking in thin-layer electrodeposition
publishDate	2000
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00319015_v69_n3_p963_Dengra http://hdl.handle.net/20.500.12110/paper_00319015_v69_n3_p963_Dengra
work_keys_str_mv	AT dengrasilvina fronttrackinginthinlayerelectrodeposition AT molinafernandovictor fronttrackinginthinlayerelectrodeposition
_version_	1768546712695078912

Front tracking in thin-layer electrodeposition

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