English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Role of Advective Inertia in Active Nematic Turbulence

Koch, C.-M., & Wilczek, M. (2021). Role of Advective Inertia in Active Nematic Turbulence. Physical Review Letters, 127: 268005. doi:10.1103/PhysRevLett.127.268005.

Item is

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Koch, Colin-Marius1, Author           
Wilczek, Michael1, Author           
Affiliations:
1Max Planck Research Group Theory of Turbulent Flows, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2266693              

Content

show
hide
Free keywords: -
 Abstract: Suspensions of active agents with nematic interactions exhibit complex spatiotemporal dynamics such as
mesoscale turbulence. Since the Reynolds number of microscopic flows is very small on the scale of
individual agents, inertial effects are typically excluded in continuum theories of active nematic turbulence.
Whether active stresses can collectively excite inertial flows is currently unclear. To address this question,
we investigate a two-dimensional continuum theory for active nematic turbulence. In particular, we
compare mesoscale turbulence with and without the effects of advective inertia. We find that inertial effects
can influence the flow already close to the onset of the turbulent state and, moreover, give rise to large-scale
fluid motion for strong active driving. A detailed analysis of the kinetic energy budget reveals an energy
transfer to large scales mediated by inertial advection. While this transfer is small in comparison to energy
injection and dissipation, its effects accumulate over time. The inclusion of friction, which is typically
present in experiments, can compensate for this effect. The findings suggest that the inclusion of inertia and
friction may be necessary for dynamically consistent theories of active nematic turbulence.

Details

show
hide
Language(s): eng - English
 Dates: 2021-12-232021
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1103/PhysRevLett.127.268005
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Physical Review Letters
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: 6 Volume / Issue: 127 Sequence Number: 268005 Start / End Page: - Identifier: ISSN: 0031-9007
ISSN: 1079-7114