Large-eddy simulations of forced isotropic turbulence with viscoelastic fluids described by the FENE-P model

• Tipo: Artigo em Revista Científica Internacional
• Data: 2016

Autores

Pedro O. Ferreira (Autor) Outra; Fernando T. Pinho (Autor) FEUP; Carlos B. da Silva (Autor) Outra

Revista

Título: Physics of Fluids

Vol. 28 Nº 12

Páginas: 125104-1-125104-31

ISSN: 1070-6631

Editora: American Institute of Physics

Indexação

ISI Web of Knowledge - 1 Citação

ISI Web of Science

Scopus

INSPEC

Projetos Associados

ELLES - Desenvolvimento de modelos sub-malha para simulação das grandes escalas com fluidos viscoelásticos

Outras Informações

ID Authenticus: P-00M-DMM

DOI: 10.1063/1.4968218

Abstract (EN): A new subgrid-scale (SGS) model developed for large-eddy simulations (LES) of dilute polymer solutions, described by the finitely extensible nonlinear elastic constitutive equation closed with the Peterlin approximation, is presented. In this distortion similarity model (DSIM) the filtered conformation tensor evolution equation is based on the self-similarity of the polymer stretching terms, and on a global equilibrium of the trace of the conformation tensor, which is proportional to the elastic energy stored in the polymer molecules, while the SGS stresses are modelled with the classical Smagorinsky model. The DSIM closure is assessed in direct numerical simulations (DNS) of forced isotropic turbulence using classical a priori tests, and in a posteriori (LES) showing very good agreement with all the exact (filtered DNS) results. The DSIM model is simple to implement and computationally inexpensive and represents a major step forward in the numerical simulation of turbulent flows of Newtonian fluids with polymer additives.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 31