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首页> 外文期刊>Journal of porous media >Effect of Fouling on Stability of Bioconvection of Gyrotactic Microorganisms in a Porous Medium
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Effect of Fouling on Stability of Bioconvection of Gyrotactic Microorganisms in a Porous Medium

机译：污垢对多孔介质中回转乳酸菌生物对流稳定性的影响

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The main objective of this article is to investigate the effect of fouling on the stability of a uniform suspension of gyrotactic motile microorganisms in a fluid-saturated porous medium. Fouling occurs because of the deposition of microorganisms on a porous matrix. This deposition decreases porosity and permeability of the porous medium. Stability analysis carried out in this article reveals that there is a critical porosity of the porous medium. If the porous medium utilized for this process has a smaller porosity than critical, the uniform suspension of gyrotactic microorganisms is stable and bioconvection does not develop. If the porous medium has larger porosity than critical, the uniform suspension is unstable and bioconvection develops. In this article, a combination of analytical and numerical methods is utilized to solve this problem. First, a linear stability analysis is carried out analytically. Then, at the final stage of the research, numerical methods are utilized to compute the critical Darcy number.
机译：本文的主要目的是研究结垢对回旋运动微生物在液体饱和多孔介质中均匀悬浮液稳定性的影响。由于微生物在多孔基质上的沉积而发生结垢。这种沉积降低了多孔介质的孔隙率和渗透性。本文进行的稳定性分析表明，多孔介质存在临界孔隙率。如果用于该方法的多孔介质的孔隙率小于临界孔隙率，则回旋微生物的均匀悬浮是稳定的，并且不会产生生物对流。如果多孔介质的孔隙率大于临界值，则均匀的悬浮液将变得不稳定，并且会产生生物对流。在本文中，分析和数值方法相结合被用来解决这个问题。首先，通过分析进行线性稳定性分析。然后，在研究的最后阶段，采用数值方法来计算临界达西数。

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