Nektar++

December 13th – 15th, 2021, Online

UPDATE (08/12/2021)

Unfortunately, due to the rapid increase in number of cases of coronavirus in London and the work-from-home guidance issued by both the UK government and Imperial College London, we are no longer able to run an in-person component to this meeting. The meeting will now take place entirely on-line. The information below has been updated accordingly.

Objective

The 5th annual Nektar++ Workshop will bring together developers and users of all experiences to hear about new and future developments in Nektar++ and the exciting science and engineering being undertaken with the code. This year, we will host the workshop in an online-only manner. In-person participation is no longer possible due to UK government COVID restrictions.

The afternoon sessions will include a comprehensive programme of talks, while the morning sessions will include lectures and tutorials on the Spectral/hp element method in partnership with the ITN on Stability and Sensitivity Methods for Flow Control and Industrial Design (SSeCoID). Following the workshop, there will be the opportunity for developers and users to discuss and work on specific aspects of the code.

Schedule

The schedule is shown below. Abstracts and recordings of the presentations are available for some of the items in the schedule.

Day 1 (13th December)

• 13:00 – 15:00 Session 1: Nektar++ Project (Chair: Chris Cantwell)
  • 13:00 – 13:30: Chris Cantwell (Imperial College London): Welcome and summary of the past two years.
  • 13:30 – 14:00: Giacomo Castiglioni (Imperial College London / ETH): Achieving performance through vectorisation in Nektar++.
  • 14:00 – 14:30: Zhen-guo Yan (Imnperial College London): Development implicit JFNK-DG compressible flow solver.
  • 14:30 – 15:00: David Moxey (Kings College London): New and improved development practices in Nektar++
• 15:00 – 15:30 Break
• 15:30 – 17:30 Session 2: Fundamental Fluids (Chair: Chris Cantwell)
  • 15:30 – 16:00: Hongyi Jiang (University of Western Australia): Flow past a circular cylinder: Numerical convergence and computational efficiency
  • 16:00 – 16:30: Nikesh Yadav (Warsaw University of Technology): Flow dynamics and onset of nonlinear states in corrugated Couette-Poiseuille flow with minimal advection velocity using Nektar++
  • 16:30 – 17:00: Abhishek Kumar (Coventry University): Stability, receptivity and sensitivity of mixed baroclinic convection in a cavity
  • 17:00 – 17:30: Stanislaw Gepner (Warsaw University of Technology): Looking for a laminar-turbulent edge with Nektar++

Day 2 (14th December)

• 09:00 – 12:00 Lectures & Tutorials 1
  • 09:00 – 10:20: Mohsen Lahooti: Introduction to spectral/hp element formulations
  • 10:20 – 10:40: Break
  • 10:40 – 12:00: Spencer Sherwin: Flow Solvers
    • Velocity Correction Scheme for incompressible flows
    • DG formulation for explicit and implicit compressible flows
• 12:00 – 13:00 Lunch break
• 13:00 – 15:00 Session 3: Industrial Applications (Chair: Chris Cantwell)
  • 13:00 – 13:30: Gianmarco Mengaldo (National University of Singapore): An industry-relevant implicit LES via spectral/hp element methods
  • 13:30 – 14:00: James Slaughter (Imperial College London): Nektar++ for Automotive Geometries
  • 14:00 – 14:30: Daniel Lindblad (Imperial College London): Jet Noise Predictions using Nektar++
  • 14:30 – 15:00: Guglielmo Vivarelli & João Isler (Imperial College London): Spectral/hp analysis of a high-Reynolds transitional flow subject to a strong adverse pressure gradient by means of incompressible/compressible solvers.
• 15:00 – 15:30 Break
• 15:30 – 17:30 Session 4: Library-level developments (Chair: David Moxey)
  • 15:30 – 15:40: Mike Kirby (University of Utah, USA): Library-Level Update By the Utah Team
  • 15:40 – 16:10: Vidhi Zala (University of Utah, USA): Convex optimization-based structure-preserving filtering for polynomial-based numerical methods
  • 16:10 – 16:40: Max Carlson (University of Utah, USA): An overview of new tools in Nektar++ for solving fractional differential equations
  • 16:40 – 17:30: Hari Sundar (University of Utah, USA): A geometrically informed algebraic multigrid preconditioner for solving high-order finite element systems

Day 3 (15th December)

• 09:00 – 12:00 Lectures & Tutorials 2
  • 09:00 – 09:50: Spencer Sherwin: Stabilisation of under-resolved spectral/hp element simulations
  • 10:00 – 10:50: Joaquim Peiro, Kaloyan Kirilov: High-order meshing & Demo
  • 10:50 – 11:00: Break
  • 11:00 – 11:50: Joaquim Peiro, Kaloyan Kirilov: High-order meshing & Demo
• 12:00 – 13:00 Lunch break
• 13:00 – 15:00 Session 5: Moving and morphing bodies (Chair: Chris Cantwell)
  • 13:00 – 13:30: Mohsen Lahooti (Imperial College London): Fluid-Structure interaction simulation in Nektar++
  • 13:30 – 14:00: Wei He (University of Liverpool): Study on the flow instability of a morphing airfoil at low Reynolds number
  • 14:00 – 14:30: Ankang Gao (Imperial College London): Implicit large-eddy simulations of a three-dimensional plunging wing
  • 14:30 – 15:00: Edward Laughton (University of Exeter): Implementation of a moving geometry solver in Nektar++ using discontinuous Galerkin methods

• 15:00 – 15:30 Break
• 15:30 – 17:30 Session 6: Applications (Chair: Chris Cantwell)
  • 15:30 – 15:45: Alexander Proskurin (Altai state technical university): A spectral/hp element method for magnetohydrodynamics
  • 15:45 – 16:15: Anthony Rouquier (Coventry University): Quasi-static magneto-hydrodynamic convection in a rotating cylinder
  • 16:15 – 16:45: Jan Pech (Czech Academy of Sciences): Advances in implementation of the Incompressible Navier-Stokes-Fourier solver with variable material properties
  • 16:45 – 17:15: Swapnil Kumar (University of Louisville): Stability analysis of Connected Systems using Nektar++
• 17:15 Workshop close

Cost

The workshop is free to attend.

Registration

Registration for the workshop is now available at: https://www.eventbrite.co.uk/e/nektar-workshop-2021-tickets-97980766109