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

• Type: Article in International Conference Proceedings Book
• Date: 2018

Authors

da Silva, CB (Author) Other; F. T. Pinho (Author) FEUP; Cruz, DOA (Author) Other

Conference proceedings International

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

Pages: 909-911

Indexing

Scopus

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific