2007 Volume 73 Issue 733 Pages 1798-1805
The two-dimensional bioconvections in a rectangular chamber have been studied numerically. In this study, our main attention was paid to the behaviors in a large Γ region and the influence of the periodic change of the surface oxygen concentration, where, Γ is analogous to the Rayleigh number in thermal convection. The calculation results are summarized as follows. (1) The increase in Γ has an effect to increase the number of plume. (2) In the large Γ region, we can find the chaotic behavior near the side wall. (3) The periodic oscillation of the surface oxygen concentration has an effect to increase the inequality in the distribution of the bacteria concentration. Moreover, we can find the existence of the optimum frequency for the enhancement of the inequality in the distribution of the bacteria concentration.
Transactions of the Society of Mechanical Engineers
Transactions of the Japan Society of Mechanical Engineers
Transactions of the Japan Society of Mechanical Engineers Series A
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A
Transactions of the Japan Society of Mechanical Engineers Series C
