Cerfacs Enter the world of high performance ...

This event is performed in collaboration with EXCELLERAT P2 and the EU Project HERMES

Cerfacs is Qualiopi certified for its training activities

Duration : 5 days / 35 hours

Satisfaction index

In November 2025, 100% of participants were satisfied or very satisfied

(results collected from 11 respondents out of 12 participants, a response rate of 92%)

Testimony

Overall, the course was highly beneficial, and I feel confident in using AVBP (G., 2025)

Abstract

The AVBP code is a parallel code of fluid mechanics that solves compressible Navier-Stokes equations for laminar and turbulent reactive flows, in 2D and 3D, on unstructured and hybrid meshes, with third order Taylor Galerkin schemes. The resolution of these equations is based on the Large Eddy Simulation (or Large Eddy Simulation) approach. Reduced chemical kinetics according to the Arrhenius law coupled to the TFLES model for sub-grid flame-turbulence interactions make possible to treat combustion phenomena. AVBP can also calculate two-phase flows using a Lagrangian or Eulerian solver. AVBP applies to aeronautical combustion chambers, turbomachinery, industrial furnaces and safety issues, it allows for example to evaluate polluting emissions (CO, NOx and soot), to treat thermo-acoustic instabilities or detonation phenomena. AVBP is a world-famous code in the field of combustion, used by many laboratories (IMFT in Toulouse, EM2C in Centralesupelec, TU Munich, Von Karmann Institute, ETH Zurich, etc.) and in industry (SAFRAN AIRCRAFT ENGINES, SAFRAN HELICOPTER ENGINES, ARIANEGROUP, HERAKLES, TOTAL, etc.).

Objective of the training

The objective of the training is twofold: firstly, to understand the fundamental principles of Large-Scale Simulations for compressive reactive two-phase flows: numerical methods, boundary conditions, LES approach and closure models for LES, combustion as well as two-phase flows through theoretical courses; on the other hand, to learn how to use the AVBP code on the perimeter of two-phase reactive flows through tutorials supervised by experts of the code.

Learning outcomes

At the end of the training, participants will be able to:

• Describe the equations solved in AVBP for computing reactive turbulent two-phase flows.

• Specify the available models to deal with characteristics input and output boundary conditions, wall treatments, chemical kinetics, sub-grid interactions (turbulence and turbulence-flame), two-phase flows.

• Set up the computation of a reactive two-phase turbulent flow in a given geometry, from the generation of the initial solution of and the boundary conditions, through the parametrization of the computation in terms of numerical and physical models, to the launching of the computation on parallel computing machine, and until post-processing of the results.

Teaching methods

The training is an alternation of theoretical presentations and practical work. A multiple choice question allows the final evaluation. The training room is equipped with computers, the work can be done in sub-groups of two people.

Referent teacher: Eleonore RIBER

Target participants

This course is intended for engineers, physicists, computer scientists and numerical analysts wishing to learn the LES reactive turbulent two-phase flows and how to use the AVBP code.

Prerequisites and registration

In order to follow this course, you need to:

• Know Unix commands.
• Know Basic knowledge of Fortran.
• Know numerical flow simulations.
• Have level B2 of CEFR (the training can take place in French of English depending on the audience).

To verify that the prerequisites are satisfied, the following questionnaire must be completed. You need to get at least 75% of correct answers in order to be authorized to follow this training session. If you don’t succeed it, your subscription will not be validated. You only have two chances to complete it.

Questionnaire and registration : click here

Deadline for registration: 15 days before the starting date of each training

Before signing up, you may wish to report us any particular constraints (schedules, health, unavailability…)at the following e-mail address : training@cerfacs.fr

Fee

• Trainees/PhDs/PostDocs : 560 € excl. tax
• CERFACS shareholders/CNRS/INRIA : 1400 € excl. tax
• Public :2800 € excl. tax

Program

(Every day from 9h to 17h30)

Day 1

. 9:00: Welcome and coffee

· 9:15: Talk – Introduction

· 9:45: Talk – Introduction oF the work: AWS, Paraview and AVBP

· 10/30: Handson – Setting up a first case using AVBP: convection of a 2D vortex in a periodic domain

Boundary conditions (Part 1)

· 14:00: Talk – NSCBC formalism for compressible code & Boundary Conditions in AVBP

· 15:30:  Hands-on – Boundary conditions and acoustic waves

Day 2

Boundary conditions (Part 2)

• 9:00 : Handson – Convection of 2D vortex with inlet/outlet boundary conditions

• 10:45: Handson – Sudden expansion

Gaseous combustion (Part 1)

• 14:00: Talk -Thermochemistry and laminar combustion modeling

• 15:00: Handson – 1D premixed flame with globally-fitted chemistry

• 16:15: Handson – 1D flame with ARC chemistry

Day 3

Gaseous combustion (Part 2)

• 9:00: Talk – Turbulent combustion modeling.

• 9:45: Handson – DNS 2D of a Bunsen flame

• 11:00: Handson – TFDNS 2D of a Bunsen flame

Spray combustion (Part 1)

• 14:00: Talk – Spray flame modeling (Part1)

• 15:00: Handson – A turbulent spray burner: the Cambridge burner

• 16:15: Handson: droplet evaporation using a simplified model

Day 4

Spray Combustion (Part 2)

• 9:00: Talk – Spray flame modeling (Part2)

• 10:00: Handson – droplet evaporation using a complex model

• 11:00: Hands-on – 1D spray flame structure

Non-reacting combustor case

• 14:00: Talk – Numerics

• 15:00: Hands-on – Setting up a reacting case from scratch in a combustor

Day 5

Reacting combustor case
• 9:00: Hands-on – Setting up a reacting case from scratch

• 10:45: Hands-on – Troubleshooting combustor runs

Other topics

• 14:00: Talk – Other AVBP features and AVBP roadmap

• 15:00: Personal project-related questions

Evaluation of learning

A final exam will be conducted during the training.