Personal homepage of Antonio RAMOS REYES
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Current position: Professor of Electromagnetism in the
Department of Electronics and Electromagnetism, Faculty of Physics,
University of Seville.
Co-responsible for the direction of research
electrokinetics of suspensions and colloids in the
group of Electrohydrodynamics and Cohesive Granular Media.
Title: PhD in Physics, 1993, University of Seville.
PhD thesis: Equilibrium shapes and bifurcation diagrams
of liquid bridges and drops in the presence of electric fields.
Antonio Castellanos Mata
ac electroosmosis, dielectrophoresis, electrothermal flow, microsystems, microelectrodes, micropumps, microfluidics, Taylor's cone, electrohydrodynamics, equilibrium shapes, liquid bridge,
fine powders, cohesivity, flowability, fluidized bed
Directions of research in a few words:
Main scientific results:
- Description of new kinds of fluid flows induced by ac electric fields in microsystems (ac electroosmosis and electrothermal flows), and their influence in dielectrophoresis
- New types of cone solutions for liquid-liquid interfaces subjected to electric fields are described; the classical Taylor cone solution for conducting liquids is extended to dielectric liquids
Experimental and numerical determination of the critical electric field needed to hold a dielectric liquid bridge of given slenderness and volume
Theoretical explanation and experimental measurement of the
electric-field-induced fluid flow in microsystems named "ac electroosmosis"
Description of an apparatus based on a novel use of a powder bed for measuring different properties of fine cohesive powders
Main scientific publications:
A. Ramos, H. Morgan, N.G. Green & A. Castellanos.
AC electrokinetics: A review of forces in microelectrode structures.
J. Phys. D: Appl. Phys., vol. 31, 2338--2353 (1998)
A. Ramos & A. Castellanos. Conical points in liquid-liquid interfaces subjected to electric fields. Phys. Letters A, vol. 184, 268-272 (1994)
A. Ramos, H. González & A. Castellanos. Experiments on dielectric liquid bridges subjected to electric fields. Phys. Fluids, vol. 6, 3206-3208 (1994)
N.G. Green, A. Ramos, A. González, H. Morgan & A. Castellanos. Fluid flow induced by non-uniform AC electric fields in electrolytes on microelectrodes. III. Observation of stream-lines and numerical simulation.
Phys. Rev. E, vol. 66, 026305 (2002)
J.M. Valverde, A. Castellanos, A. Ramos, A.T. Pérez, M.A. Morgan & P.K. Watson. An automated apparatus for measuring the tensile strength and compressibility of fine cohesive powders.
Rev. Scientific Instruments, vol. 71, 2791-2795 (2000)
Antonio Ramos, Editor. Electrokinetics and Electrohydrodynamics in Microsystems. CISM Courses and Lectures, vol. 530. Springer (2011)
PhD Thesis (Direction)
Dpto. de Electrónica y Electromagnetismo,
Universidad de Sevilla, Avenida Reina Mercedes s/n,
41012, Sevilla, Spain
+34 954 556 410
+34 954 239 434
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Last update: September, 2012