Professor Marcelo J.S. de Lemos

Invited plenary speaker: Marcelo J.S. de Lemos, a Professor of Computational Fluid Dynamics and Turbulence Modellling at Instituto Tecnológico de Aeronáutica, Brazil

Advances in Modeling Turbulent Flow, Heat and Mass Transfer in Heterogeneous Media

Engineering equipment design and environmental impact analyses can benefit from appropriate modeling of turbulent flow in permeable media. A number of natural and engineering systems can be characterized by some sort of porous structure through which a working fluid permeates. Turbulence models proposed for such heterogeneous media depend on the order of application of time and volume average operators. Two developed methodologies, following the two orders of integration, lead to different governing equations for the statistical quantities. This lecture reviews recently published methodologies to mathematically characterize turbulent transport in porous media. The concept of double-decomposition is discussed and models are classified in terms of the order of application of time and volume averaging operators, among other peculiarities. Thermal non-equilibrium between phases is discussed. For hybrid media, involving both a porous structure and a clear flow region, difficulties arise due to the proper mathematical treatment given at the interface. This lecture discusses numerical solutions for such hybrid medium. In addition, macroscopic forms of buoyancy terms are presented for both mean and turbulent fields. Cases reviewed include heat transfer in porous enclosures, cavities partially filled with porous material, moving bed systems, combustion in porous media and double- diffusion effects in porous media.

About the author:

Marcelo J.S. de Lemos was born in Rio de Janeiro, Brazil, where he obtained his Bachelor and MSc degrees in Mechanical Engineering from the Pontifical Catholic University of Rio de Janeiro (PUC-RJ) in 1977 and 1979, respectively. In early 1983, he obtained his PhD degree from Purdue University, USA. He spent a year as Assistant Professor at PUC-RJ in 1984, followed by two years as Resident Associate at Argonne National Laboratory, Illinois. In 1986, he joined the Aeronautical Institute of Technology - ITA in São José dos Campos, Brazil. He is Full Professor at ITA, founder and head of the Computational Transport Phenomena Laboratory - LCFT and the newly established Competence Center for Energy – CCE. He also serves as Head of the Department of Energy. From 1991 to 1992, he was Visiting Scholar at Ruhr-Universität-Bochum, Germany. In early 1992, he became Member of the American Society of Mechanical Engineers - ASME and in 2009 he was promoted to the "Fellow" grade by ASME. He and has advised 11 PhD and 22 MSc students.
Marcelo J.S. de Lemos has set a new mathematical framework for novel treatment of turbulent flow, heat, and mass transfer through permeable media. On the overall, he has published more than 360 articles in conference proceedings and journals in addition to nine book chapters and five books. He is member of the Honorary Editorial Advisory Boards of Int. J. Heat & Mass Transfer and Int. Comm. Heat & Mass Transfer, member of the Editorial Advisory Board of J. Porous Media and Editorial Board Member of Int. J. Dynamics of Fluids and Int. J. Applied Engineering Research. He has coordinated several joint research projects with DLR and Uni-Erlangen, Germany, and has delivered seminar lectures in Brazil, USA, Portugal, Tunis, Lebanon, Italy, France, Germany, South Korea, Romania, UAE and Japan. He is Consultant to Brazilian Education Ministry (CAPES), Brazilian National Research Council (CNPq) and São Paulo State Research Foundation (FAPESP). He holds a Fellowship from CNPq at the highest rank (PQ-1A). He is member of the International Advisory Board of VIRTUHCON research initiative, which is led by TU-Freiberg, Germany, and fully supported by the German Ministry of Science and Education in cooperation with the Government of Saxony.
Marcelo J.S. de Lemos is interested in computational thermo-fluid dynamics, transport phenomena, porous media, thermal engineering, aerodynamics, gas turbines, advanced fossil and renewable energy systems (wind, solar, biomass), high performance computing, turbulent reactive flow, computational mathematics, combustion dynamics, modeling and simulation of thermochemical systems, fuel cells, gasification processes and CO2 capture and storage technologies.

Professor de Lemos website can be found under this link