Study on the Effects of Microstructural Surfaces on the Attachment of Moving Microbes

Hongyue Yang, Ji Qian, Ming Yang, Chunxi Li, Hengfan Li and Songling Wang
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Hongyue Yang: Department of Power Engineering, North China Electric Power University, Baoding 071003, China
Ji Qian: College of Horticulture, Hebei Agricultural University, Baoding 071000, China
Ming Yang: College of Life Sciences, Hebei Agricultural University, Baoding 071001, China
Chunxi Li: Department of Power Engineering, North China Electric Power University, Baoding 071003, China
Hengfan Li: Department of Power Engineering, North China Electric Power University, Baoding 071003, China
Songling Wang: Department of Power Engineering, North China Electric Power University, Baoding 071003, China

Energies, 2020, vol. 13, issue 17, 1-13

Abstract: The research of marine antifouling is mainly conducted from the aspects of chemistry, physics, and biology. In the present work, the movement model of microorganisms along or against the flow direction on the microstructural surface was established. The model of globose algae with a diameter of 5 μm in the near-wall area was simulated by computational fluid dynamics (CFD), and the fluid kinematic characteristics and shear stress distribution over different-sized microstructures and in micropits were compared. Simulation results revealed that the increase of the β value (height to width ratio) was prone to cause vortexes in micropits. In addition, the closer the low-velocity region of the vortex center to the microstructural surface, the more easily the upper fluid of the microstructure slipped in the vortex flow and reduced the microbial attachment. Moreover, the shear stress in the micropit with a height and width of 2 μm was significantly higher than those in others; thus, microbes in this micropit easily fell off.

Keywords: microstructure; computational fluid dynamic; microorganism attachment; flow characteristics; shear stress (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
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