Imperial College London

DrSylvainLaizet

Faculty of EngineeringDepartment of Aeronautics

Senior Lecturer
 
 
 
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Contact

 

+44 (0)20 7594 5045s.laizet Website

 
 
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Location

 

339City and Guilds BuildingSouth Kensington Campus

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Summary

 

Summary

I am a lecturer in the Turbulence, Mixing and Flow Control (TMFC) group, in the Department of Aeronautics at Imperial College London (ICL). I hold a PhD from the University of Poitiers in France in the field of Computational Fluid Dynamics (CFD) applied to turbulence. Before becoming a lecturer in 2014, I was a Research and Teaching Assistant at the P' Institute in Poitiers and a Research Assistant in the Department of Aeronautics at ICL.

Understanding turbulent flows and how to use them in various engineering applications is the motivation behind my research. In the last ten years, I successfully developed and used powerful numerical methods based on a Cartesian mesh to work on the turbulence problem, with a specialisation in High Performance Computing (HPC). I am a specialist in Direct and Large Eddy Numerical Simulation (DNS/LES) that can only be performed on the most powerful supercomputers in Europe. At ICL, and thanks to a dCSE support from NAG/HECToR, I have fully parallelised my high-order fluid flow solver Incompact3d using an innovative domain decomposition technique that makes it one of the only few codes in the world that can run on hundreds of thousands computational cores. Another important element in my work is an Immersed Boundary Method (IBM) technique which can be used as a very useful strategy for the modelling of flows with solid geometries. 

At Imperial College, I am currently working on the active control of a turbulent jet using microjets and on the assessment of Plasma Actuator Technologies for Internal Flows. With my colleagues in Porto Alegre, I am investigating particle-laden gravity currents.

-RESEARCH ACTIVITIES:

2015-Present: Modelling of Dielectric Barrier Discharge Plasma Actuators for Direct Numerical Simulations with the P' Institute in Poitiers;

2013-Present: DNS of the interaction of a wall-attached cube with a turbulent boundary layer J.C. Vassilicos (Imperial College) and BAE Systems;

2009-Present: Numerical dissipation via the viscous term for DNS/LES, with the P' Institute in Poitiers and J.C. Vassilicos (Imperial College);

2009-Present: Acoustic predictions using an incompressible DNS database with the P' Institute in Poitiers;

2010-Present: Turbulent jet controlled by fluidic actuators with the P' Institute in Poitiers;

2010-Present: DNS of dilute suspension particle-laden gravity currents with Porto Alegre and PETROBRAS in Brazil;

2010-Present: Turbulent plumes with deposition with Porto Alegre and PETROBRAS in Brazil;

2008-Present: Development and use of a virtual wind tunnel based on the high-order flow solver Incompact3d (www.incompact3d.com): parallelisation with up to one million computational cores, post-processing tools using virtual probes, virtual cameras and virtual microphones (http://www.2decomp.org/mpiio.html). In collaboration with NAG and STFC Daresbusry;

2006-2014: High-fidelity simulations of multiscale generated turbulence;

2006-2010: DNS of the flow separation behind a rounded leading edge. In collaboration with the P' Institute in Poitiers and Porto Alegre in Brazil;

2008-2010: Proper Orthogonal Decomposition (POD) technique combined with DNS for a spatially-evolving mixing-layer;

2007-2010: Improvement of Particle Image Velocimetry (PIV) filtering using a DNS database, with B. Ganapathisubramani (Southampton, UK) and O. Buxton (Imperial College);

2010-2015: Numerical study of the mixing of a passive scalar  in the presence of a mean gradient for grid-generated turbulence with J.C. Vassilicos (Imperial College);

2012-2013: Superfluid turbulence, with A. Baggalew (Newcastle, UK)

http://scholar.google.com/citations?user=16idoCMAAAAJ&hl=en

Publications

Journals

Dairay T, Lamballais E, Laizet S, et al., 2017, Numerical dissipation vs. subgrid-scale modelling for large eddy simulation, Journal of Computational Physics, Vol:337, ISSN:0021-9991, Pages:252-274

Diaz-Daniel C, Laizet S, Vassilicos JC, 2017, Wall shear stress fluctuations: Mixed scaling and their effects on velocity fluctuations in a turbulent boundary layer, Physics of Fluids, Vol:29, ISSN:1070-6631

Mahfoze O, Laizet S, 2017, Skin-friction drag reduction in a channel flow with streamwise-aligned plasma actuators, International Journal of Heat and Fluid Flow, Vol:66, ISSN:0142-727X, Pages:83-94

Boschung J, Peters N, Laizet S, et al., 2016, Streamlines in stationary homogeneous isotropic turbulence and fractal-generated turbulence, Fluid Dynamics Research, Vol:48, ISSN:0169-5983

Conference

Benard N, Laizet S, Moreau E, 2017, PIV-based dynamic model of EHD volume force produced by a surface dielectric barrier discharge, 55th AIAA Aerospace Sciences Meeting, American Institute of Aeronautics and Astronautics

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