Antonio Castellanos: a great scientist and a great man

Advanced Problems in Mechanics 2017, St. Petersburg, Russia Antonio Castellanos: a great scientist and a great man Antonio Castellanos Prof. of Electromagnetism 1947 – 2016 A great scientist and a great man ! ! by F. Pontiga, A. Ramos and E.F. Grekova Advanced Problems in Mechanics 2017, St. Petersburg, Russia Antonio Castellanos: a great scientist and a great man The roots Antonio Castellanos was born in Antoñanes del Páramo, a small village near León, on 7th of March of 1947. Antoñanes del Páramo Advanced Problems in Mechanics 2017, St. Petersburg, Russia Antonio Castellanos: a great scientist and a great man The roots ! He was the third (and last) child of a modest family. ! His father, Manuel Castellanos Berjón, was a talented teacher. He was a “republican teacher”, persecuted by Franco’s regime. He taught children during all his life, though for many years he was prohibited to do it. Manuel Castellanos Berjón, Antonio’s father Advanced Problems in Mechanics 2017, St. Petersburg, Russia Antonio Castellanos: a great scientist and a great man The roots ! Antonio’s mother, Fidela Mata Sarmiento, was also a woman of exceptional intelligence, strong personality and a passionate reader. Antonio’s parents separated in his early childhood, but his father continued to be in touch with the children, and taught Antonio mathematics. Fidela Mata Sarmiento, Antonio’s mother Advanced Problems in Mechanics 2017, St. Petersburg, Russia Antonio Castellanos: a great scientist and a great man The roots ! Close family ties with his mother and his siblings, Domingo José and Aurora, were very important for Antonio during all his life. Antonio with his sister, mother and brother in Gijón (Spain) 1997. Advanced Problems in Mechanics 2017, St. Petersburg, Russia Antonio Castellanos: a great scientist and a great man The child Antonio and his family moved to León when he was six years old. He decided to entered the seminary to become a priest, which gives him the possibility of pursuing his undergraduate studies. However, during his adolescence, he started questioning the religious philosophy he had to study, and he left the seminary. Advanced Problems in Mechanics 2017, St. Petersburg, Russia Antonio Castellanos: a great scientist and a great man The child Antonio and his family moved to León when he was six years old. He decided to entered the seminary to become a priest, which gives him the possibility of pursuing his undergraduate studies. However, during his adolescence, he started questioning the religious philosophy he had to study, and he left the seminary. León Cathedral, also called The House of Light Advanced Problems in Mechanics 2017, St. Petersburg, Russia Antonio Castellanos: a great scientist and a great man The university student He enters the Faculty of Physical Sciences of the University of Valladolid in 1963, and graduated in 1969. In 1972 he got his PhD in Nuclear Physics. Later, he will spend the next academic year in Ohio University (USA), with a Fulbright scholarship. Antonio (right), with some classmates, during a travel to Madrid. Advanced Problems in Mechanics 2017, St. Petersburg, Russia Antonio Castellanos: a great scientist and a great man The traveler Before returning to Spain, Antonio, with his friend Sergio, embarked on a journey through almost all of Latin America, following the trail of the Pan American Highway. This was a journey no exempt of risk and real danger, which marked his whole life. Advanced Problems in Mechanics 2017, St. Petersburg, Russia Antonio Castellanos: a great scientist and a great man Antonio at K. Watson’s home. The Scientist He worked in closed collaboration with top researchers from around the world: Pierre Atten (Grenoble, France), Keith Watson (Xerox Corp., Rochester, USA), J. S. Chang (Hamilton, Canada), Hywel Morgan (Glasgow, UK), Anton M. Krivtsov (St. Petersburg, Russia) and many others. He co-authored more than 350 papers with more than 7800 citations (after Google Scholar). Advanced Problems in Mechanics 2017, St. Petersburg, Russia Antonio Castellanos: a great scientist and a great man Antonio at Mc Master, with J.S. Chang, G. Touchard, K. Asano, T. Lee, O. Lesaint, and others. The Scientist He worked in closed collaboration with top researchers from around the world: Pierre Atten (Grenoble, France), Keith Watson (Xerox Corp., Rochester, USA), J. S. Chang (Hamilton, Canada), Hywel Morgan (Glasgow, UK), Anton M. Krivtsov (St. Petersburg, Russia) and many others. He co-authored more than 350 papers with more than 7800 citations (after Google Scholar). Advanced Problems in Mechanics 2017, St. Petersburg, Russia Antonio Castellanos: a great scientist and a great man Pavel Zhilin, Iliya Blekhman, Vladimir Palmov, Anton Krivtsov, Dave Harris and Antonio Castellanos at APM 2004. Antonio and his group participated in APM conferences starting from 1998, when it still had another name: “Nonlinear Oscillations in Mechanical Systems”. He was one of first foreign participants of APM, a permanent member of its Scientific Committee, and organized various minisymposia. Antonio always was very keen to discuss with his Russian colleagues, among them especially with Pavel Zhilin, Dmitri Indeitsev and young scientists, who always were attracted by his passion for science, bright ideas, his open, friendly personality and fine sense of humour. Antonio and Advanced Problems in Mechanics Advanced Problems in Mechanics 2017, St. Petersburg, Russia Antonio Castellanos: a great scientist and a great man These scientific discussions continued even at the banquet… First plan: Irina Goryacheva, Elena Grekova, Antonio Castellanos, Anton Krivtsov at APM2005 Antonio and Advanced Problems in Mechanics Advanced Problems in Mechanics 2017, St. Petersburg, Russia Antonio Castellanos: a great scientist and a great man The Head of EHD&CGM Group Antonio founded the EHD&CGM Group of the University of Seville, which encompasses three major research lines: -Electrohydrodynamics, -Gas discharges, -Cohesive granular materials. His exceptional leadership allowed him to found two excellent laboratories. Advanced Problems in Mechanics 2017, St. Petersburg, Russia Antonio Castellanos: a great scientist and a great man Two outstanding contributions: •Flow of electrolytes driven by AC electric fields on microelectrode structures: AC Electroosmosis ! •Physical mechanisms of instability in a liquid layer subjected to an electric field and a thermal gradient ! Advanced Problems in Mechanics 2017, St. Petersburg, Russia Antonio Castellanos: a great scientist and a great man Flow of electrolytes driven by AC electric fields on microelectrode structures: AC Electroosmosis Advanced Problems in Mechanics 2017, St. Petersburg, Russia Antonio Castellanos: a great scientist and a great man During dielectrophoretic manipulation of particles suspended in electrolytes… Positive DEP Negative DEP 0.5 MHz 5 MHz Advanced Problems in Mechanics 2017, St. Petersburg, Russia Antonio Castellanos: a great scientist and a great man …strong frequency-dependent fluid flow is observed, predominantly at low frequencies. Advanced Problems in Mechanics 2017, St. Petersburg, Russia Antonio Castellanos: a great scientist and a great man The flow occurs due to the action of the applied electric field on the charge which is induced in the electrical double layer on the electrodes. Advanced Problems in Mechanics 2017, St. Petersburg, Russia Antonio Castellanos: a great scientist and a great man Comparisons theory and experiments characteristic frequency around 1/RbulkCDL Vpp=1 V Advanced Problems in Mechanics 2017, St. Petersburg, Russia Antonio Castellanos: a great scientist and a great man A detail experimental and theoretical study was published Fluid flow induced by nonuniform ac electric fields in electrolytes on microelectrodes. I. Experimental measurements Physical Review E, vol. 61, no. 4, pp. 4011-4018 (2000) (citations 509) Fluid flow induced by nonuniform ac electric fields in electrolytes on microelectrodes. II. A linear double-layer analysis Physical Review E, vol. 61, no. 4, pp. 4011-4018 (2000) (citations 385) Fluid flow induced by nonuniform ac electric fields in electrolytes on microelectrodes. III. Observation of streamlines and numerical simulation Physical Review E, vol. 66, no. 2, pp. 26305 (2002) (citations: 427) ! Advanced Problems in Mechanics 2017, St. Petersburg, Russia Antonio Castellanos: a great scientist and a great man This paper is one of 12 papers chosen from Journal of Physics D: Applied Physics for a book containing 50 highly influential papers published in the Journal of Physics series during the last 50 years. Advanced Problems in Mechanics 2017, St. Petersburg, Russia Antonio Castellanos: a great scientist and a great man Two outstanding contributions: •Flow of electrolytes driven by AC electric fields on microelectrode structures: AC Electroosmosis ! •Physical mechanisms of instability in a liquid layer subjected to an electric field and a thermal gradient ! Advanced Problems in Mechanics 2017, St. Petersburg, Russia Antonio Castellanos: a great scientist and a great man injector, q = q0 collector, q = qd dielectric liquid with residual conduction Physics of Fluids 27, 1607 (1984); doi: http://dx.doi.org/10.1063/1.864816 Advanced Problems in Mechanics 2017, St. Petersburg, Russia Antonio Castellanos: a great scientist and a great man Physical mechanisms of instability in a liquid layer subjected to an electric field and a thermal gradient hot plate, q = q0 > qd cold plate, q = qd Rayleigh-Bénard convection g -Ñp-Ñp (r-dr)grg Advanced Problems in Mechanics 2017, St. Petersburg, Russia Antonio Castellanos: a great scientist and a great man Physical mechanisms of instability in a liquid layer subjected to an electric field and a thermal gradient Rayleigh-Bénard convection Source: Vincent Croquette (1989) Convective pattern dynamics at low Prandtl number: Part I, Contemporary Physics, 30:2, 113-133 Vincent Croquette (1989): Convective pattern dynamics at low Prandtl number: Part II, Contemporary Physics, 30:3, 153-171 Advanced Problems in Mechanics 2017, St. Petersburg, Russia Antonio Castellanos: a great scientist and a great man Physical mechanisms of instability in a liquid layer subjected to an electric field and a thermal gradient injector collector Charge injection E-Ñp q+E Advanced Problems in Mechanics 2017, St. Petersburg, Russia Antonio Castellanos: a great scientist and a great man Physical mechanisms of instability in a liquid layer subjected to an electric field and a thermal gradient injector collector Charge injection -Ñp -Ñp (q++dq+)E q+E (strong injection) E Advanced Problems in Mechanics 2017, St. Petersburg, Russia Antonio Castellanos: a great scientist and a great man Physical mechanisms of instability in a liquid layer subjected to an electric field and a thermal gradient injector collector Charge injection (weak injection) E-Ñp -Ñp (q++dq+)E q+E Advanced Problems in Mechanics 2017, St. Petersburg, Russia Antonio Castellanos: a great scientist and a great man Physical mechanisms of instability in a liquid layer subjected to an electric field and a thermal gradient STABLE REGION heating from above heating from below STABLE REGION Advanced Problems in Mechanics 2017, St. Petersburg, Russia Antonio Castellanos: a great scientist and a great man Physical mechanisms of instability in a liquid layer subjected to an electric field and a thermal gradient heating from above heating from below STABLE REGION Advanced Problems in Mechanics 2017, St. Petersburg, Russia Antonio Castellanos: a great scientist and a great man Physical mechanisms of instability in a liquid layer subjected to an electric field and a thermal gradient STABLE REGIONSTABLE REGION heating from above heating from below STABLE REGION Advanced Problems in Mechanics 2017, St. Petersburg, Russia Antonio Castellanos: a great scientist and a great man Physical mechanisms of instability in a liquid layer subjected to an electric field and a thermal gradient STABLE REGION heating from above heating from below STABLE REGION Advanced Problems in Mechanics 2017, St. Petersburg, Russia Antonio Castellanos: a great scientist and a great man Physical mechanisms of instability in a liquid layer subjected to an electric field and a thermal gradient STABLE REGION heating from above heating from below STABLE REGION Advanced Problems in Mechanics 2017, St. Petersburg, Russia Antonio Castellanos: a great scientist and a great man Epilogue •Antonio always looked for the basic understanding and modeling of the physical phenomena. •He made important contributions to the progress of science in many different areas, and particularly in electrohydrodynamics and electrokinetics, plasma chemistry of gas discharges, and physics and mechanics of cohesive granular materials. •He took care of and trained numerous doctoral students who today are relevant researchers in their respective fields. •He was appreciated by all who knew him. We will remember him forever, with affection and admiration.