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首页> 外文期刊>International Journal of Thermal Sciences >The onset of bio-thermal convection in a suspension of gyrotactic microorganisms in a fluid layer: Oscillatory convection
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The onset of bio-thermal convection in a suspension of gyrotactic microorganisms in a fluid layer: Oscillatory convection

机译:旋流微生物在流体层中的悬浮液中生物热对流的发生:振荡对流

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摘要

A linear stability analysis is applied to investigate the onset of bioconvection in a horizontal layer of fluid containing a suspension of motile microorganisms with heating or cooling from below. With cooling from below the stabilizing effect of the thermal stratification is opposed to the destabilizing effect resulting from the congregation of the microorganisms, and oscillatory convection is possible in certain circumstances. The stability criterion is found in terms of a thermal Rayleigh number, a bioconvection Rayleigh number, a bioconvection Peclet number, a gyrotactic number, and a measure of the cell eccentricity, together with (in the case of oscillatory convection) a Prandtl number and a Lewis number.
机译:进行线性稳定性分析,以研究含有运动微生物悬浮液的液体水平层中生物对流的发生,并从下方进行加热或冷却。从下方冷却时,热分层的稳定作用与微生物聚集引起的不稳定作用相反,并且在某些情况下可能产生振荡对流。根据热瑞利数,生物对流瑞利数,生物对流佩克雷特数,旋涡数和细胞偏心率的度量以及(在振荡对流的情况下)普朗特数和刘易斯数。

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