2014/11/18 by Antonella Abbà, Abbà, Antonella, Massimo Germano +6
Engineering · Medicine · Physics and Astronomy · #65M60 #76F65 #76M10 #76M30 #Advanced MRI Techniques and Applications #Aerospace engineering #Computational fluid dynamics #Computer science #Engineering #FOS: Physical sciences #Fluid Dynamics (physics.flu-dyn) #Nuclear Physics and Applications #Reynolds-averaged Navier–Stokes equations #Ultrasonics and Acoustic Wave Propagation #msc:65M60 #msc:76F65 #msc:76M10 #msc:76M30 #physics.flu-dyn
paper · pdf · doi:10.48550/arxiv.1411.4882
published in arXiv (Cornell University) (Cornell University)
arxiv created 2014/11/18 · openalex publication_date 2014/11/18 · arxiv updated 2014/11/19 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
A new hybrid RANS/LES technique, based on the hybrid filter proposed by Germano in 2004, has been studied. The novelty herein introduced is represented by the reconstruction of the Reynolds stress tensor. As a consequence, no explicit RANS model is needed. The RANS and LES terms are merged using a constant blending factor. The model is implemented in a numerical code based on a high order Discontinuous Galerkin (DG) finite element formulation. The test case considered for numerical simulations is the turbulent tur- bulent channel flow at Mach = 0.2. The comparison with available DNS data shows a good agreement and, in general, an improvement with re- spect to pure LES results, confirming that the technique herein proposed represents a promising approach to the numerical simulation of turbulent flows.