期刊
JOURNAL OF THEORETICAL BIOLOGY
卷 219, 期 2, 页码 137-152出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1006/jtbi.2002.3077
关键词
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In three-dimensional bioconvection, the regions of rising and sinking fluid are dissimilar. This geometrical effect is studied for axisymmetric bioconvection in a cylindrical cell with stress-free (i.e. normal velocity and tangential stress vanish) lateral and top boundaries, and rigid bottom boundary. Using the continuum model of Pedley et al, (1988, J. Fluid Mech.195, 223-237) for bioconvection in a suspension of swimming. gyrotactic microorganisms, the structure and stability of an axisymmetric plume in a deep chamber are investigated. The system is governed by the Navier-Stokes equations for an incompressible fluid coupled with a microorganism conservation equation. These equations are solved numerically using a conservative finite-difference scheme. Comparisons are made with two-dimensional bioconvection. (C) 2002 Elsevier Science Ltd. All rights reserved.
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