Accumulation of motile microorganisms in turbulence

Caijuan Zhan; Gaetano Sardina; Enkeleida Lushi; Luca Brandt

Accumulation of motile microorganisms in turbulence

Caijuan Zhan, Gaetano Sardina, Enkeleida Lushi, Luca Brandt

Research output: Contribution to conference › Paper › peer-review

Abstract

The effects of turbulence on marine ecology are studied by performing direct numerical simulations of motile microorganisms in isotropic homogeneous turbulence. We show that in a fully turbulent flow the patchiness and clustering is reduced respect to simple laminar and vortical flows. Micro-organisms in presence of gyrotaxis tend to accumulate if spherical in shape while elongated swimmers are more randomly distributed because of their sensitivity to the local shear. These results suggest that purely hydrodynamic phenomena can influence the marine life of microorganisms when the type of flow and their shape are changed.

Original language	English (US)
State	Published - 2020
Externally published	Yes
Event	14th European Turbulence Conference, ETC 2013 - Lyon, France Duration: Sep 1 2013 → Sep 4 2013

Conference

Conference	14th European Turbulence Conference, ETC 2013
Country/Territory	France
City	Lyon
Period	9/1/13 → 9/4/13

All Science Journal Classification (ASJC) codes

Acoustics and Ultrasonics
Astronomy and Astrophysics
Atmospheric Science
Geophysics

Cite this

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title = "Accumulation of motile microorganisms in turbulence",

abstract = "The effects of turbulence on marine ecology are studied by performing direct numerical simulations of motile microorganisms in isotropic homogeneous turbulence. We show that in a fully turbulent flow the patchiness and clustering is reduced respect to simple laminar and vortical flows. Micro-organisms in presence of gyrotaxis tend to accumulate if spherical in shape while elongated swimmers are more randomly distributed because of their sensitivity to the local shear. These results suggest that purely hydrodynamic phenomena can influence the marine life of microorganisms when the type of flow and their shape are changed.",

author = "Caijuan Zhan and Gaetano Sardina and Enkeleida Lushi and Luca Brandt",

note = "Publisher Copyright: Copyright {\textcopyright} ETC 2013 - 14th European Turbulence Conference.All rights reserved.; 14th European Turbulence Conference, ETC 2013 ; Conference date: 01-09-2013 Through 04-09-2013",

year = "2020",

language = "English (US)",

}

TY - CONF

T1 - Accumulation of motile microorganisms in turbulence

AU - Zhan, Caijuan

AU - Sardina, Gaetano

AU - Lushi, Enkeleida

AU - Brandt, Luca

PY - 2020

Y1 - 2020

N2 - The effects of turbulence on marine ecology are studied by performing direct numerical simulations of motile microorganisms in isotropic homogeneous turbulence. We show that in a fully turbulent flow the patchiness and clustering is reduced respect to simple laminar and vortical flows. Micro-organisms in presence of gyrotaxis tend to accumulate if spherical in shape while elongated swimmers are more randomly distributed because of their sensitivity to the local shear. These results suggest that purely hydrodynamic phenomena can influence the marine life of microorganisms when the type of flow and their shape are changed.

AB - The effects of turbulence on marine ecology are studied by performing direct numerical simulations of motile microorganisms in isotropic homogeneous turbulence. We show that in a fully turbulent flow the patchiness and clustering is reduced respect to simple laminar and vortical flows. Micro-organisms in presence of gyrotaxis tend to accumulate if spherical in shape while elongated swimmers are more randomly distributed because of their sensitivity to the local shear. These results suggest that purely hydrodynamic phenomena can influence the marine life of microorganisms when the type of flow and their shape are changed.

UR - http://www.scopus.com/inward/record.url?scp=85085773584&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85085773584&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:85085773584

T2 - 14th European Turbulence Conference, ETC 2013

Y2 - 1 September 2013 through 4 September 2013

ER -

Accumulation of motile microorganisms in turbulence

Abstract

Conference

All Science Journal Classification (ASJC) codes

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