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A third occurrence of the MUSAF Colloquium cycle will be organized on 27-29 September 2016 by ONERA and CERFACS, in Toulouse.

The main goal is to present and to promote discussions about the current state-of-the art of the numerical fluid mechanics for aeronautical purposes. Five topics will be addressed: aeroacoustics, icing, combustion, complex geometries and big data, multiphase flows with in each associated session one key lecture and several other lectures.



Session 1: Aeroacoustics 

Noise control is now a very challenging topic particularly in aeronautical engineering. Increasing stringent limits for noise emission forced several researches, in particular via the numerical approach with the goal to understand and accurately predict the noise generation and propagation in turbulent flow. This session will provide the opportunity to give some advances recently obtained by some of the major contributors in this field.

Session 2: Icing

Icing is a critical issue in flight safety, being the cause of many flight incidents. Significant progresses are achieved all around the world, as well in the physical modelling of the various faces of the phenomena leading to aircraft icing or de-icing as in their numerical modelling. This session dedicated to icing gathers academic and industrial experts to give an overview of the present modelling status and challenges.

Session 3: Combustion

The potential of using high fidelity simulation methods for the prediction of turbulent combustion is now widely recognized: Large Eddy Simulation is becoming a predictive tool used to design industrial combustors. With the increasingly stringent emission regulations and fuel consumption reductions, considering new combustion regimes brings new research opportunities. These include the analysis of fundamental combustion physics and dynamics, flame stabilization, energy transfer mechanisms, pollutant formation and emission as well as the control of these. The combustion session will address some of these critical research topics: soot formation modeling, experimental investigation of new combustion systems (Constant Volume Combustion), use of plasmas for ignition and flame stabilization and finally the use of LES for the design of aeroengine combustors.

Session 4: Complex geometries

Computational Fluid Dynamics (CFD) is playing an expanding role in aerospace design and enhancing its capabilities especially for unsteady flow simulations is considered as a major objective in the field. While the advent of parallel computing has allowed a substantial increase in the mesh sizes, it is still widely acknowledged that the design of a three-dimensional volume mesh remains one of the most important bottlenecks for large-scale complex simulations. Hence, the challenge of handling complex geometries relates not only to computing cost, but also to solution quality in terms of meshing and validation of the computed unsteady field. In this session, some of these important aspects will be discussed and illustrated on a range of exciting cutting-edge examples showing the application of Immersed Boundary Methods (IBM), adaptive Cartesian approaches as well as Lattice Boltzmann Methods (LBM) to aeronautics and automotive-related flows

Session 5: Multiphase flow

Two-phase flow modeling in the domain of aircraft and launcher engine is of fundamental interest. Indeed, multiphase flows appear in many forms: from separated two-phase flows in the injection devices, to dispersed phase in the combustion chamber and liquid film on the chamber walls. Moreover, the two-phase phenomena develop at different time and length scales leading to different physical and numerical models. Accurate predictive simulations need strong HPC capabilities to tackle two-phase flows in combustion chambers. This session will give an extensive overview of the state of art two-phase flow numerical modelling from atomization process to spray behavior.