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Gyrotactic swimmer dispersion in pipe flow: testing the theory

Autor: Croze, O. A., Bearon, R. N., Bees, M. A.

Publikováno v: J. Fluid Mech. Vol. 113, 481-506 (2017)

Suspensions of microswimmers are a rich source of fascinating new fluid mechanics. Recently we predicted the active pipe flow dispersion of gyrotactic microalgae, whose orientation is biased by gravity and flow shear. Analytical theory predicts that

Externí odkaz: http://arxiv.org/abs/1608.08911

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Dispersion of swimming algae in laminar and turbulent channel flows: consequences for photobioreactors

Autor: Croze, O. A., Sardina, G., Ahmed, M., Bees, M. A., Brandt, L.

Publikováno v: J. R. Soc. Interface, vol 10, 20121041 (2013)

Shear flow significantly affects the transport of swimming algae in suspension. For example, viscous and gravitational torques bias bottom-heavy cells to swim towards regions of downwelling fluid (gyrotaxis). It is necessary to understand how such bi

Externí odkaz: http://arxiv.org/abs/1205.2840

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Biased swimming cells do not disperse in pipes as tracers: a population model based on microscale behaviour

Autor: Bearon, R. N., Bees, M. A., Croze, O. A.

Publikováno v: Phys. Fluids, vol 24, 121902 (2012)

There is much current interest in modelling suspensions of algae and other micro-organisms for biotechnological exploitation, and many bioreactors are of tubular design. Using generalized Taylor dispersion theory, we develop a population-level swimmi

Externí odkaz: http://arxiv.org/abs/1205.0453

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Sheared bioconvection in a horizontal tube

Autor: Croze, O. A., Ashraf, E. E., Bees, M. A.

Publikováno v: Phys. Biol. 7 (2010) 046001

The recent interest in using microorganisms for biofuels is motivation enough to study bioconvection and cell dispersion in tubes subject to imposed flow. To optimize light and nutrient uptake, many microorganisms swim in directions biased by environ

Externí odkaz: http://arxiv.org/abs/1010.0258

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Dispersion of biased swimming microorganisms in a fluid flowing through a tube

Autor: Bees, M. A., Croze, O. A.

Publikováno v: Proc. R. Soc. A 2010 vol. 466 pp. 2057-2077

Classical Taylor-Aris dispersion theory is extended to describe the transport of suspensions of self-propelled dipolar cells in a tubular flow. General expressions for the mean drift and effective diffusivity are determined exactly in terms of axial

Externí odkaz: http://arxiv.org/abs/1001.3635

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