English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Life stages of wall-bounded decay of Taylor-Couette turbulence

Ostilla-Monico, R., Zhu, X., Spandan, V., Verzicco, R., & Lohse, D. (2017). Life stages of wall-bounded decay of Taylor-Couette turbulence. Physical Review Fluids, 2(11): 114601. doi:10.1103/PhysRevFluids.2.114601.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002E-287D-D Version Permalink: http://hdl.handle.net/21.11116/0000-0001-5FD1-9
Genre: Journal Article

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Ostilla-Monico, R., Author
Zhu, X., Author
Spandan, V., Author
Verzicco, R., Author
Lohse, Detlef1, Author              
Affiliations:
1Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2063285              

Content

show
hide
Free keywords: -
 Abstract: The decay of Taylor-Couette turbulence, i.e., the flow between two coaxial and independently rotating cylinders, is numerically studied by instantaneously stopping the forcing from an initially statistically stationary flow field at a Reynolds number of Re = 3.5 x 10(4). The effect of wall friction is analyzed by comparing three separate cases, in which the cylinders are either suddenly made no-slip or stress-free. Different life stages are observed during the decay. In the first stage, the decay is dominated by large-scale rolls. Counterintuitively, when these rolls fade away, if the flow inertia is small a redistribution of energy occurs and the energy of the azimuthal velocity behaves nonmonotonically, first decreasing by almost two orders of magnitude and then increasing during the redistribution. The second stage is dominated by non-normal transient growth of perturbations in the axial (spanwise) direction. Once this mechanism is exhausted, the flow enters the final life stage, viscous decay, which is dominated by wall friction. We show that this stage can be modeled by a one-dimensional heat equation, and that self-similar velocity profiles collapse onto the theoretical solution.

Details

show
hide
Language(s): eng - English
 Dates: 2017-11-01
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1103/PhysRevFluids.2.114601
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Physical Review Fluids
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: 10 Volume / Issue: 2 (11) Sequence Number: 114601 Start / End Page: - Identifier: -