Flow States and Transitions of an Active Nematic in a Three-Dimensional Channel
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Flow States and Transitions of an Active Nematic in a Three-Dimensional Channel. / Chandragiri, Santhan; Doostmohammadi, Amin; Yeomans, Julia M.; Thampi, Sumesh P.
In: Physical Review Letters, Vol. 125, No. 14, 148002, 30.09.2020.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Flow States and Transitions of an Active Nematic in a Three-Dimensional Channel
AU - Chandragiri, Santhan
AU - Doostmohammadi, Amin
AU - Yeomans, Julia M.
AU - Thampi, Sumesh P.
PY - 2020/9/30
Y1 - 2020/9/30
N2 - We use active nematohydrodynamics to study the flow of an active fluid in a 3D microchannel, finding a transition between active turbulence and regimes where there is a net flow along the channel. We show that the net flow is only possible if the active nematic is flow aligning and that, in agreement with experiments, the appearance of the net flow depends on the aspect ratio of the channel cross section. We explain our results in terms of when the hydrodynamic screening due to the channel walls allows the emergence of vortex rolls across the channel.
AB - We use active nematohydrodynamics to study the flow of an active fluid in a 3D microchannel, finding a transition between active turbulence and regimes where there is a net flow along the channel. We show that the net flow is only possible if the active nematic is flow aligning and that, in agreement with experiments, the appearance of the net flow depends on the aspect ratio of the channel cross section. We explain our results in terms of when the hydrodynamic screening due to the channel walls allows the emergence of vortex rolls across the channel.
KW - MIGRATION
KW - MOTION
U2 - 10.1103/PhysRevLett.125.148002
DO - 10.1103/PhysRevLett.125.148002
M3 - Journal article
C2 - 33064508
VL - 125
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 14
M1 - 148002
ER -
ID: 249903308