Advanced CFD and Turbulence Modelling targeting HPC

Description

Description 

The scientific areas covered by this proposal merge multiphysics modelling and High Performance Computing (HPC) together. The areas covered by multiphysics modelling will deal first with Conjugate Heat Transfer (CHT), where traditional Computational Fluid Dynamics (CFD) is coupled to solid heat diffusion, and then with turbomachinery for the example of a flow in a pump in the turbulent regime. Turbulence modelling will be covered, by looking at advanced modelling through Large-Eddy Simulation (LES) and Reynolds Averaged Navier Stokes (RANS) models. LES is a technique which relies on filtering the Navier-Stokes equations, that was first introduced by Smagorinsky in 1963 [1]. It has become much more popular recently because of the computing power increase, even if still not routinely used by industry. Vast computing power is required because modelling is only carried out at the sub-grid scale level. This aspect of turbulence modelling will be coupled with heat diffusion in a solid for a CHT case of a heated cross flow inside a rod bundle, which corresponds to a typical application for heat exchangers in thermal power generation. RANS modelling will be used to simulate the flow in a pump, using a Reynolds Stress Model [2] to account for flow anisotropy.
The School will insist on both interlinked aspects between advanced multiphysics modelling, and HPC, showing that the former applied to some cutting edge applications related to power generation cannot be carried out without HPC capabilities. The path for developing/optimising a massively parallel multiphysics HPC software will also be introduced [3], and recent developments related to GPU porting and performance will also be given.

 

Location

Barcelona Supercomputing Center, Spain

 

Registration

Registration deadline: October 1, 2026

Register here. 

 

Agenda

First Day

-10:00-10:15 Reception and registration

-10:15-10:30 Introduction and welcome by the organisers

-10:30-11:00 Lecture: Coupling for Multiphysics – Application to Alya – Guillaume Houzeaux (BSC)

-11:00-11:30 Coffee break

-11:30-12:00 Lecture: Presentation of the CFD tool, code_saturne – Stefano Rolfo (UKRI-STFC)

-12:00-13:30 Hands-on tutorial: Laminar flow in a 2-D bundle of tubes

-13:30-14:30 Lunch

-14:30-15:30 Lecture: Preparing a CFD software for exascale – Charles Moulinec (UKRI-STFC)

-15:30-16:00 Coffee break

-16:00-18:00 Hands-on tutorial: LES and CHT in a 3-D bundle of tubes

18:00 End of the day

 

Dinner at 20:30 - Address to be confirmed

 

 

Second Day

-10:00-11:00 Lecture: Advanced turbulence modelling and CHT – Wei Wang (UKRI-STFC)

-11:00-11:30 Coffee break

-11:30-13:00 Hands-on tutorial: Analysis of the LES and CHT results

-13:00-14:00 Lunch

-14:00-15:45 Hands-on tutorial: Turbomachinery using code_saturne’s internal module (1)

-15:45-16:15 Coffee break

-16:15-18:00 Hands-on tutorial: Turbomachinery using code_saturne's internal module (2)

18:00 End of the day

 

Dinner at 20:30 - Address to be confirmed

 

 

Third Day

-09:00-09:30 Hands-on tutorial: Analysis of the results of the turbomachinery simulations

-09:30-10:30 Hands-on tutorial: Performance assessment: partitioning and hybrid MPI-X

-10:30-11:00 Coffee break

-11:00-12:00 Lecture: Introduction to GPU programming in code_saturne by Yvan Fournier (EDF)

-12:00-13:00 Hands-on tutorial: Test on GPUs

-13:00-14:00 Lunch

-14:00-15:00 Hands-on tutorial: In-situ visualisation using code_saturne

15:00 End of the School