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首页> 外文期刊>Journal of Theoretical Biology >Axisymmetric bioconvection in a cylinder.
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Axisymmetric bioconvection in a cylinder.

机译:圆柱中的轴对称生物对流。

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摘要

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.
机译:在三维生物对流中,上升和下沉流体的区域不同。研究了这种几何效应对圆柱池中轴对称生物对流的影响,该池具有无应力(即法向速度和切向应力消失)的横向和顶部边界,以及刚性的底部边界。使用Pedley等人的连续模型。 (1988,J.Fluid Mech.195,223-237)用于游动的,旋涡状微生物的悬浮液中的生物对流,研究了深室中轴对称羽流的结构和稳定性。该系统由不可压缩流体的Navier-Stokes方程和微生物守恒方程共同控制。这些方程使用保守的有限差分方案进行数值求解。用二维生物对流进行比较。

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