SoftwareThe major part of the team is involved in the development of the AVBP and the NSMB aerodynamic solvers. Nevertheless the team also contributes to the development of elsA flow solver. The codes NTMIX, NTMIX CHEMKIN and Meso-NH are used for vortex flow problems. Special attention to SOUNDTUBE, a software tool for thermo-acoustic instabilities developed by CERFACS The numerical simulations are carried out on the VPP-5000 of Météo-France and on the Origin 2000 of CERFACS.
AVBP AVBP is a parallel CFD code that solves the laminar and turbulent compressible Navier-Stokes equations in two and three space dimensions on unstructured and hybrid grids. While initially conceived for steady state flows of aerodynamics, today the current exclusive area of applications is the modelling of unsteady (reacting) flows. These activities are strongly related to the rising importance paid to the understanding of the flow structure and mechanisms leading to turbulence. The prediction of these unsteady turbulent flows is primarily based on the LES (Large Eddy Simulation) approach. An Arrhenius law reduced chemistry model allows to study reacting flows in combustion for complex configurations.
To get more information about this code, click here.
Contact: G. Staffelbach
NSMB NSMB is a parallel solver for the resolution of the Navier-Stokes equations on multiblock structured grids. It is developed by EPFL (Ecole Polytechnique Federale de Lausanne), KTH (Kungl. Tekniska Hoegskolan), CERFACS, Airbus France (Airbus France), SAAB; since year 2000 by SINUMEF (ENSAM Paris) and CFS Engineering; and since year 2001 by IMFT (Institut de Mécanique des Fluides de Toulouse). NSMB is used by the Airbus France's conception chain for aircraft design. The code is written in Fortran 77, the parallelisation is carried out with MPI. An automatic procedure of non regression and validation is used at CERFACS for each release.
To get more information about NSMB, click here.
Contact: J-F. Boussuge
elsA The ensemble logiciel de simulation Aérodynamique is a software developed by ONERA, Airbus France and CERFACS for aerodynamics problems. It is based on object oriented concepts (C++ language). The Aerodynamcis team is involved in the implementation of advanced boundary conditions (NSCBC...) and meshing strategies (non-coincident interfaces, Chimera...). A strong effort is currently done to develop massively parallel functionalities (simulations have already been performed using thousands of computing cores) and numerical schemes for high-fidelity simulations (adapted to Large Eddy Simulation).
To get more information about this code, go to the elsA website.
Contact: J-F. Boussuge
NTMIXNTMIX is a high-order flow solver to perform Direct Numerical Simulation and Large Eddy Simulation of reactive flows. It is based on a 6th order compact scheme for spatial derivatives, combined with a 3rd order Runge-Kutta time integrator, and is fully parallelised. Developed in collaboration with our partners of CRCT (Centre de Recherche sur la Combustion turbulente, involving also I.F.P., I.M.F.T. and E.M2.C-Ecole Centrale de Paris), NTMIX is also capable of calculating two-phase flows with a Lagrangian solver. NTMIX is used to study turbulent combustion and other generic configurations for combustion, as well as non-reactive flows like wake vortex flows.
To get more information about this code, go to the NTMIX website.
Contact: B. Cuenot
NTMIX-CHEMKINNTMIX-CHEMKIN is the complex chemistry and transport version of NTMIX. The solver is coupled to the CHEMKIN package to handle complex chemical kinetics and mixture thermodynamic and tranport properties. It is a fully vectorized code, allowing to compute flames with as much as 50 chemical species. Due to its high CPU cost, NTMIX-CHEMKIN is restricted to 2D simulations and generic configurations. It is used to study in great detail the fine chemical structure of flames and their behaviors when submitted to the flow dynamcis
Contact: B. Cuenot
SOUNDTUBESOUNDTUBE is a software tool for thermo-acoustic instabilities developed by CERFACS. It is written in C++ language and runs on a work station or a simple PC. Its main purpose is to give, in few minutes, a first idea of gas turbine eigen frequencies and the corresponding modes. To achieve this goal, the real configuration is viewed as a 3 dimensional network of elementary tubes with the following features:
- low mach number flow
- longitudinal acoustic wave only
- "n-tau" model for the transfert function of the flame
Contact: T. Poinsot