Viscoelastic flow instability in planar shear flow

Autor(en)

Ivan S. Novikau, Sofia S. Kantorovich, Sebastian A. Altmeyer

Abstrakt

We report direct numerical simulations of elastic turbulence in shear-driven flow of a dilute polymer solution within a three-dimensional straight channel. Most existing approaches in the literature employ the Oldroyd-B model or its advanced version, the finite extensible nonlinear elastic model introduced by Peterlin (FENE-P model), for simulation of polymer hydrodynamics, with their limitations of being continuum models. To overcome such restriction, we explicitly model the dilute polymer solution utilizing a classical bead-spring representation for each polymer chain and, therefore, also accounting for spatial variations in polymer concentration. We show that the viscoelastic instability forms in elastic waves and eventually chaotic flow, which persists above the transition with increasing Weissenberg number further into viscoelastic turbulence.

Organisation(en)

Computergestützte Physik und Physik der Weichen Materie

Externe Organisation(en)

Universitat Politècnica de Catalunya

Journal

Physics of fluids

Band

37

Anzahl der Seiten

7

ISSN

1070-6631

DOI

https://doi.org/10.1063/5.0261021

Publikationsdatum

06-2025

Peer-reviewed

Ja

ÖFOS 2012

103015 Kondensierte Materie, 103029 Statistische Physik

ASJC Scopus Sachgebiete

Computational Mechanics, Condensed Matter Physics, Mechanics of Materials, Mechanical Engineering, Fluid Flow and Transfer Processes

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/6ccd429b-2383-499a-9f49-2dfdc8f4d59b