Energy spectra in forced homogenous isotropic turbulence of FENE-P solutions

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2018

Autores

da Silva, CB (Autor) Outra; F. T. Pinho (Autor) FEUP; Cruz, DOA (Autor) Outra

Ata de Conferência Internacional

Título: Proceeding of THMT-18. Turbulence Heat and Mass Transfer 9 Proceedings of the Ninth International Symposium On Turbulence Heat and Mass Transfer

Páginas: 909-911

Indexação

Scopus

Outras Informações

ID Authenticus: P-00X-6MG

DOI: 10.1615/thmt-18.980

Abstract (EN): We present results of Direct Numerical Simulations of statistically stationary (forced) homogeneous isotropic turbulence at the highest Reynolds number in existence (Re¿ = 400) for viscoelastic fluids described by the Finitely Extensible Nonlinear Elastic constitutive equation, closed with the Peterlin approximation (FENE-P), at various Deborah numbers. The DNS data show that at Deborah numbers in the range 0.2 to 0.6, the energy spectra have simultaneously the characteristic -5/3 slope of the inertial subrange at low wave numbers, followed a region of -3 slope at higher wave numbers, in the so-called inertio-elastic subrange that starts at the Lumley scale, and below the high wavenumber dissipative scales. Dimensional arguments that justify these flow regimes are also presented. ©2018 Begell House, Inc.

Idioma: Inglês

Tipo (Avaliação Docente): Científica