Transition to turbulence in Taylor-Couette ferrofluidic flow Journal Article

Author(s): Altmeyer, Sebastian A; Do, Younghae; Lai, Ying-Cheng
Article Title: Transition to turbulence in Taylor-Couette ferrofluidic flow
Affiliation IST Austria
Abstract: It is known that in classical fluids turbulence typically occurs at high Reynolds numbers. But can turbulence occur at low Reynolds numbers? Here we investigate the transition to turbulence in the classic Taylor-Couette system in which the rotating fluids are manufactured ferrofluids with magnetized nanoparticles embedded in liquid carriers. We find that, in the presence of a magnetic field transverse to the symmetry axis of the system, turbulence can occur at Reynolds numbers that are at least one order of magnitude smaller than those in conventional fluids. This is established by extensive computational ferrohydrodynamics through a detailed investigation of transitions in the flow structure, and characterization of behaviors of physical quantities such as the energy, the wave number, and the angular momentum through the bifurcations. A finding is that, as the magnetic field is increased, onset of turbulence can be determined accurately and reliably. Our results imply that experimental investigation of turbulence may be feasible by using ferrofluids. Our study of transition to and evolution of turbulence in the Taylor-Couette ferrofluidic flow system provides insights into the challenging problem of turbulence control.
Keywords: transition to turbulence, ferrofluids, Taylor-Couette flow
Journal Title: Scientific Reports
Volume: 5
ISSN: 20452322
Publisher: Nature Publishing Group  
Date Published: 2015-06-12
Start Page: Article number: 10781
Copyright Statement: CC-BY
Sponsor: Y.D. was supported by Basic Science Research Program of the Ministry of Education, Science and Technology under Grant No. NRF-2013R1A1A2010067. Y.C.L. was supported by AFOSR under Grant No. FA9550-12-1-0095.
DOI: 10.1038/srep10781
Open access: yes (OA journal)