Laure Billon

Safran Electronics (Canada)

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Elie Hachem

Centre de Mise en Forme des Matériaux

Youssef Mesri

École Nationale Supérieure des Mines de Paris

Frédéric Alauzet

Institut national de recherche en informatique et en automatique

Dimitrios Papadogiannis

Safran Electronics (Canada)

Thierry Coupez

Centre de Mise en Forme des Matériaux

Jessica Sari

Centre de Mise en Forme des Matériaux

Cooperative Institutions

Centre de Mise en Forme des Matériaux

Centre National de la Recherche Scientifique

École Nationale Supérieure des Mines de Paris

ParisTech

Université Paris Sciences et Lettres

Centre de Recherche en Informatique

Institut national de recherche en informatique et en automatique

Inria Saclay - Île de France

Digital Science (United States)

Safran Electronics (Canada)

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Adaptive Finite Element Simulation of Turbulent Flow Multi-Physics with Applications in Aerodynamics

HAL (Le Centre pour la Communication Scientifique Directe) (2015)

Laure Billon Youssef Mesri Elie Hachem

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Anisotropic boundary layer mesh generation for immersed complex geometries

Engineering With Computers (2016)

Laure Billon Youssef Mesri Elie Hachem

Volume mesh

Laplacian smoothing

Complex geometry

Gradation

10.1007/s00366-016-0469-7

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Citations (9)

Génération et adaptation de maillage volume-couche limite dynamique pour les écoulements turbulents autour de géométries complexes

Laure Billon

La simulation numerique des ecoulements turbulents en aerodynamique est tres complexe. Elle consiste en l'etude de l'interaction entre un fluide et un profilimmerge. On observe a la surface du profil une zone de vitesse ralentie, nommee couche limite. L'etude fine de la couche limite est primordiale pour la resolution precise de l'ecoulement. Elle necessite de ce fait un maillage particulierement fin et structure. Nous proposons une procedure automatique permettant de generer un maillage adapte pour la resolution precise de la couche limite en accord avec la theorie et les caracteristiques physiques de l'ecoulement. De plus, afin de decrire l'ecoulement turbulent dans toute sa complexite a moindres couts, nous proposons de combiner le maillage couche limite a une methode d’adaptation de maillage dynamique.A cet effet, nous avons utilise une version avancee de l'adaptation de maillagesur l'erreur a posteriori basee sur les aretes et developpe une methode permettant a la fois de conserver la structure et le raffinement dans la couche limite mais egalement de decrire precisement les recirculations et le sillage. La nouvelle methode d'adaptation volume-couche limite a ete validee sur des cas2D et 3D a geometries complexes. Les resultats mettent en relief le potentiel decette approche et ouvre des perspectives interessantes pour l'adaptation de maillage en mecanique des fluides.

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Evaluation of heat transfer performance of a film-cooled turbine vane using metric-based anisotropic mesh adaptation

AIAA SCITECH 2022 Forum (2023)

Frédéric Alauzet Dimitrios Papadogiannis Laure Billon

This paper shows the ability of metric-based anisotropic mesh adaptation to accurately predict the flow field on a particularly complex test case: a film-cooled turbine vane. Film-cooled turbine blades are very complex turbomachinery geometries because they are composed of a cooling network and many different-shaped film-cooling holes which makes these geometries extremely complex to mesh with structured meshing approaches (like multi-block hexahedral meshing methods). Consequently, metric-based anisotropic mesh adaptation seems quite appropriate for such applications as it has demonstrated that it provides automation of the whole process and it allows significant gains in terms of simulation accuracy by capturing coherent flow features proper to the turbomachinery physics. The film-cooled turbine vane simulation was made possible because the mesh-adaptive solution platform was successfully extended to periodic flows and domains.

Turbomachinery

10.2514/6.2023-1399

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Parallel anisotropic 3D mesh adaptation for unsteady turbulent Flows

HAL (Le Centre pour la Communication Scientifique Directe) (2015)

Laure Billon Youssef Mesri Elie Hachem

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Adaptive meshing method for turbulent flow simulations

HAL (Le Centre pour la Communication Scientifique Directe) (2016)

Laure Billon Youssef Mesri Elie Hachem

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Variational multiscale large eddy simulation and anisotropic mesh adaptation for transient and turbulent flows

HAL (Le Centre pour la Communication Scientifique Directe) (2014)

Elie Hachem Laure Billon Jessica Sari Thierry Coupez

Transient (computer programming)

Large-Eddy Simulation

Transient flow

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Boundary-volume mesh generation and adaptation for turbulent flows around complex geometries

HAL (Le Centre pour la Communication Scientifique Directe) (2016)

Laure Billon

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Isotropic and Anisotropic Mesh Adaptation for Rans Simulations of a Nacelle Under Crosswind Conditions

Proceedings (2022)

Dimitrios Papadogiannis Laure Billon Frédéric Alauzet

Mesh adaptation of unstructured meshes for aerodynamic simulations, that typically resolve the Reynolds Averaged Navier-Stokes (RANS) equations, is a promising approach to enable high numerical precision on complex geometries. Its objective is to minimize the discretization error without using empirical meshing guidelines. The most common approach of mesh adaptation is the “feature-based” isotropic mesh adaptation: from an initial flow prediction on an isotropic unstructured mesh, a local error estimator is computed using a flow variable. It is then used to adapt the mesh using isotropic tetras. Additional near-wall resolution can be achieved by extracting prism layers from the walls. A more efficient approach is to use anisotropic mesh adaptation purely with tetras that are stretched to follow the flow’s preferential directions. In this work, we demonstrate the abilities of feature-based isotropic and anisotropic mesh adaptation on a complex flow phenomenon of importance for jet engines: flow separation in a nacelle under crosswind conditions. Two different solvers, adapted for either isotropic or anisotropic meshes, are employed. Results are compared with standard unstructured simulations with user-imposed mesh refinements and highlight the ability of mesh adaptation to automatically capture all the relevant flow phenomena without any user input and at reduced cell counts.

Laplacian smoothing

Nacelle

10.33737/gpps22-tc-59

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