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Plenary Lecture

Modelling and Simulation of Particle-Laden Flows in Engineering Applications

Professor Konstantin Volkov
Kingston University
Faculty of Science, Engineering and Computing
London, United Kingdom
E-mail: k.volkov@kingston.ac.uk

Abstract: Industrial activity of modern society is often concerned with suspensions of solid or liquid particles in gas or fluid flows. The role of particles and droplets in environmental and engineering applications is two-fold. On the one hand, particles and droplets may pose potential hazard for human activity (erosion of surface and deposition of aerosols in human lungs). On the other hand, particles or droplet can be successfully used in engineering solutions (to induce working processes in energy systems and to suppress acoustic instabilities of thermal processes). Processes that control transport and combustion of particles and droplets in turbulent flows remain unresolved, and introduce significant uncertainties into modeling and simulation. Modeling of particles dynamics within the existing CFD models suffer from lack of currently available knowledge in particle microphysics. This lecture is aimed to quantify and to monitor particle/droplet motion in turbulent flows, and to create tools for reliable prediction of particle evolution and transport. In computer modeling of particle/droplet laden turbulent flows, particular attention is focused on improvement of existing models of particle evolution and combustion, and on advanced turbulence modeling. Both Euler and Lagrangian approaches are applied in modeling particle evolution, including vaporization, sedimentation, transport and dispersion of aggregates of complex morphology. Large-eddy simulation and Reynolds averaging techniques are used for turbulence modeling. Lagrangian stochastic approach is applied to model particle dispersion in turbulent flows. The possibilities of the computational tools developed are demonstrated using a number of model problems and case studies (internal gas-particles flows in complex channels, external gas-particle flows, explosion and detonation in gas-particle and gas-droplet systems and others). Weaknesses in the models are identified and suggestions made for possible improvements.

Brief Biography of the Speaker: Dr Konstantin Volkov is a senior lecturer in themofluids at the Kingston University (London, UK). He holds a PhD in fluid mechanics and his dissertation was on simulation of thermal processes in energy systems (St Petersburg State University, Russia, 1998). He also holds two Master degrees. The first one is in thermal engineering and his dissertation concerned simulation of internal flows in engineering applications (Baltic State Technical University, Russia, 1996). The other one is in mathematics and computer science and his dissertation was on modelling and simulation of turbulent two-phase flows in energy systems (St Petersburg State University, 1997). He has been working as a lecturer and researcher in multidisciplinary areas. After completion of his PhD, Dr K Volkov worked as a researcher and lecturer at the Baltic State Technical University in Russia for 6 years, the Centre for Research in Fire and Explosion Studies of the University of Central Lancashire in UK for 2.5 years followed by 6.5 years at the Rolls–Royce University Technology Centre in Thermofluids Systems of the University of Surrey in UK. He joined the Kingston University team in 2009. His areas of expertise cover multidisciplinary areas: from applied engineering problems related to design and optimization of energy systems to fundamental problems focused on computational fluid dynamics and mathematical modelling. Dr K Volkov is the Chartered Engineer and the member of the Institute of Physics, Institution of Mechanical Engineers and Combustion Institute. He is the editor, author or coauthor of 6 books, 6 invited book chapters, more than 120 scientific papers and the member of the editorial board and scientific committee of a number of scientific journals and conferences.

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