Speaker: Spencer Sherwin, Imperial College London

Time : 16:00 - 17:00 CEST (Rome/Paris)

Hosted at: SISSA, International School of Advanced Studies, Trieste, Italy

Zoom : A Zoom link will appear here, an hour before the talk

Organizers : Pavan Pranjivan Mehta* (pavan.mehta@sissa.it) and Arran Fernandez** (arran.fernandez@emu.edu.tr)

* SISSA, International School of Advanced Studies, Italy

** Eastern Mediterranean University, Northern Cyprus

Keywords: Spectral/hp element methods, high order finite elements, computational fluid dynamics, implicit Large Eddy Simulation, Direct Numerical Simulation

Abstract: In this presentation we will outline the development of spectral/hp element discretisation for complex geometry flow simulation using mixed shaped elements. We will overview key steps, contributions and contributors involved in translating the spectral/hp element technology from applied mathematical concepts to a discretisation method suitable for solving flow problems of industrial interest now available in the open source software Nektar++. Further,  we will outline the most recent efforts to port this technology onto vectorised and streaming architectures suitable for optimal use on CPUs with Advanced Vector Extensions (AVX) and on GPUs. 

Biography: Professor Spencer Sherwin leads an active research group specialising in the development and application of parallel high order spectral/hp element methods (Nektar++ ) for flow around complex geometries with a particular emphasis on vortical and bluff body flows and biomedical modelling of the cardiovascular system. More recently, he has been closely involved in industrial application of these methods through partnerships with McLaren Racing, Airbus and Rolls Royce. Previously he also held a RAEng/McLaren Racing Fellowship during which spectral/hp element methods were applied to problems of interest of Formula One aerodynamics that promoted the development of wall resolving large eddy simulation capabilities for highly unsteady and separated flows.

Bibliography

[1] NekTar++ website: www.nektar.info

[2] C. D. Cantwell, D. Moxey, A. Comerford, A. Bolis, G. Rocco, G. Mengaldo, D. De Grazia, S. Yakovlev, J-E. Lombard, D. Ekelschot, B. Jordi, H. Xu, Y. Mohamied, C. Eskilsson, B. Nelson, P. Vos, C. Biotto, R. M. Kirby, and S. J. Sherwin, “Nektar++: An open-source spectral/hp element framework,” Computer physics communications, vol. 192, pp. 205-219, 2015.

[3] D. Moxey, C. D. Cantwell, Y. Bao, A. Cassinelli, G. Castiglioni, S. Chun, E. Juda, E. Kazemi, K. Lackhove, J. Marcon, G. Mengaldo, D. Serson, M. Turner, H. Xu, J. Peiro,R. M. Kirby, S. J. Sherwin, “Nektar++: enhancing the capability and application of high-fidelity spectral/hp element methods”, Computer physics communications, vol. 249, 107110, 2020

[4] Karniadakis, G. & Sherwin. S. “Spectral Element for CFD”, Oxford University Press.