Mesh adaptation for large-eddy simulations in complex geometries
DOBRZYNSKI, Cécile
Certified Adaptive discRete moDels for robust simulAtions of CoMplex flOws with Moving fronts [CARDAMOM]
Institut Polytechnique de Bordeaux [Bordeaux INP]
< Leer menos
Certified Adaptive discRete moDels for robust simulAtions of CoMplex flOws with Moving fronts [CARDAMOM]
Institut Polytechnique de Bordeaux [Bordeaux INP]
Idioma
en
Article de revue
Este ítem está publicado en
International Journal for Numerical Methods in Fluids. 2016, vol. 81, n° 12, p. 719-740
Wiley
Resumen en inglés
Large-eddy simulation (LES) consists in explicitly simulating the large scales of the fluid motion and in modeling the influence of the smallest scales. Thanks to the steady growth of computational resources, LES can now ...Leer más >
Large-eddy simulation (LES) consists in explicitly simulating the large scales of the fluid motion and in modeling the influence of the smallest scales. Thanks to the steady growth of computational resources, LES can now be used to simulate realistic systems with complex geometries. However, when LES is used in such complex geometries, an adequate mesh has to be determined to perform valid LES. In this work, a strategy is proposed to assess the quality of a given mesh and to adapt it locally. Two different criteria are used as mesh adaptation criteria. The first criterion is defined to ensure a correct discretization of the mean field, whereas the second criterion is defined to ensure enough explicit resolution of turbulent scales motions. The use of both criteria is shown in canonical flow cases. As a second part of this work, a numerical strategy for mesh adaptation in high-performance computing context is proposed by coupling the flow solver, YALES2, and the remeshing library, MMG3D, for massively parallel computations. This coupling enables an efficient and parallel remeshing of grids alleviating any memory or performance issues encountered in sequential tools. This strategy is finally applied to the simulation of the isothermal flow in a complex meso-combustor to demonstrate the applicability of the adaptation methodology to complex turbulent flows.< Leer menos
Palabras clave en inglés
Meso-scale application
LES quality criteria
Parallel mesh adaptation
Adaptation procedure
Proyecto ANR
Ingénierie de la Complexité : la mécanique et ses interfaces au service des enjeux sociétaux du 21iè - ANR-11-LABX-0030
Orígen
Importado de HalCentros de investigación