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The 18 April 2017

High Order Discontinuous Spectral Methods for massively parallel LES

nasri |  

Deadline for registration: 15 days before the starting date of each training
Duration : 1 day / (7 hours)



Large Eddy Simulation (LES) needs accurate schemes with enhanced spectral properties (low dissipation and low dispersion). Even if standard high order schemes (WENO, compact…) respect this need for structured grids, the situation is less clear for complex geometries, where unstructured grids are required.
The discontinuous spectral methods were introduced in order to circumvent the drawbacks of standard methods on unstructured grids. In this case, any conservative quantity is defined as a local polynomial in a control volume through its definition in several degrees of freedom per cell.
During this training, we will introduce these approaches defines as spectral discontinuous. After a bibliographic review, attention is paid on applications performed with the in-house solver JAGUAR developed at CERFACS and based on a discontinuous spectral formalism.

Target participants

This training session is dedicated to engineers, physicists, computer scientists and numerical analysts who wish to learn these methods.


Basic knowledge in standard discretization techniques (finite volume, finite difference and finite element).


Scientific contact : Guillaume PUIGT

Jean-François BOUSSUGE


  • Trainees/PhDs/PostDocs : 50 €
  • CERFACS shareholders/CNRS/INRIA : 150 €
  • Public : 300 €


Day 1 morning:
Introduction and analysis of discontinuous spectral methods
– Discontinuous Galerkin
– Spectral Volume
– Spectral Difference
– Flux Reconstruction

Day 1 afternoon:
Effects of spectral discontinuous methods on a computational environment:
– High order mesh and curved elements,
– Splitting the mesh
– Post-treatment
– Introduction to JAGUAR
– Mesh and input file
– Boundary conditions
– Serial and parallel performance of JAGUAR

Day 2:
Application of JAGUAR on several test cases. It is also possible to work on an attendee's application.



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