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Book Launch and Colloquium from Visiting Professor Sergio Cuevas

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Date: Wednesday 14 November 2018
Venue: Swinburne EN Building (Engineering) 1:30pm-2:00pm - EN612 2:00pm-3:00pm - EN715

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Part 1: Book Launch: EN612, 1:30 pm – 2:00 pm

We would be delighted if you could join us in celebrating the launch of Aleksandra A. Bozhko & Sergey A. Suslov’s book: ‘Convection in Ferro-Nanofluids: Experiments and Theory, Physical Mechanisms, Flow Patterns, and Heat Transfer’. Refreshments and afternoon tea will be provided.

Advances in Mechanics and Mathematics

Aleksandra A. Bozhko · Sergey A. Suslov

Convection in Ferro-Nanofluids: Experiments and Theory

Physical Mechanisms, Flow Patterns, and Heat Transfer

This book covers the experimental and theoretical study of convection in non-isothermal ferro-nanofluids (FNFs). Since FNFs are not transparent and magnetic fields are very sensitive to the shape of the boundary between magnetic and nonmagnetic media, special flow visualization techniques based on the use of thermo-sensitive liquid crystal films, infrared cameras, as well as local and integral temperature sensors are discussed in the book.

This book considers several major configurations of convective chambers and the applied magnetic field. For each of them, the stability boundaries are determined theoretically and experimentally. The physical types of dominant instabilities and the characteristics of their interactions are subsequently established using linear and weakly non-linear hydrodynamic stability analyses and elements of bifurcation theory. The book also discusses the potential of using magnetically controlled ferro-nanofluids as a heat carrier in situations where heat removal by natural convection is not possible due to the lack of gravity (orbital stations) or extreme confinement (microelectronics).

Researchers and practitioners working in the areas of fluid mechanics, hydrodynamic stability, and heat and mass transfer will benefit from this book.

Part 2: Colloquium: EN715, 2:00 pm-3:00 pm

Following the book launch, a colloquium will be presented by visiting Professor Sergio Cuevas, from the National Autonomous University of Mexico (UNAM).

Colloquium: EN715

Brief Bio: Professor Sergio Cuevas is the Senior Researcher (Investigador Titular C) at the Renewable Energy Institute (IER) at the National Autonomous University of Mexico (UNAM).  He received his doctoral degree in Physics from the Faculty of Sciences of the National Autonomous University of Mexico after conducting his doctoral research at the Engineering Physics Division of Argonne National Laboratory, Illinois, USA. He subsequently worked as a researcher at the Electrical Research Institute, Mexico, and in 1996 he joined the Center for Energy Research, currently IER-UNAM. From July 2002 to June 2003 he was appointed as a Visiting Researcher at the Fusion Science and Technology Center of the University of California, Los Angeles, USA. He also held positions of Invited Professor at the Ilmenau University of Technology, Germany, the Technical University of Denmark, and the University of Navarra, Spain. His current research activities involve experimental and theoretical studies of magnetohydrodynamics of liquid metals and electrolytes, vortex dynamics, microfluidics, electromagnetic stirring, MHD devices for energy applications, as well as numerical and analytical methods in fluid dynamics, magnetohydrodynamics, heat transfer, and thermodynamics of irreversible processes. He has supervised a number of MSc and PhD students on these topics and served as Graduate Studies Coordinator of the IER-UNAM from 2014 to 2018. He is a member of the Mexican Physical Society, the American Physical Society, HYDROMAG, the Mexican Academy of Sciences, the State of Morelos Academy of Sciences, and the National System of Researchers of the Mexican Government (top tier).

Title of Colloquium: Instability of swirling electrolyte flows driven electromagnetically

Abstract: Swirling flows are present in many technological applications as well as in a large variety of natural phenomena. They take place, for instance, in the mixing protocols of many basic operations in the food, paint, chemical and materials   processing industries. In the astrophysical and planetary contexts, thin, rotating disks of gas and dust, known as accretion disks, play a fundamental role in the formation and evolution of stars, galaxies, and planetary systems. At the geophysical scale, in turn, swirling flows constitute the core of environmental phenomena, tropical cyclones being one of the well-known examples. Although modeling of large-scale flows in laboratory experiments is a big challenge, swirling flows in annuli offer the possibility of reproducing structures similar to those found in large scale applications. In this talk, we describe a recently discovered instability observed in a free-surface flow driven by an azimuthal electromagnetic force in a thin layer of an electrolyte contained in an open annulus. The force is created by the interaction of a radial electric current applied between two concentric electrodes and an approximately constant magnetic field created by a permanent magnet. The flow instability leads to the formation of travelling anticyclonic vortices (i.e. vortices that rotate in the opposite direction of the bulk flow) close to the external electrode that exist for long times once they appear. We describe different experimental techniques used to characterize the flow instability, particularly, dye visualization, Particle Image Velocimetry, and Infrared Thermography. With the aim of clarifying physical mechanisms leading to the vortex formation, numerical simulation results are contrasted with experimental observations, particularly to discern the importance of flow three-dimensionality. We also address the relevant question of the appearance of the instability under non-isothermal conditions, which has important consequences for heat transfer enhancement in industrial applications

Contact Information: Sergey Suslov
Email: Tel: 92145952