Effect of Flow Field Environment on Microstructure Surface Preventing Microorganism Attachment

doi:10.16182/j.issn1004731x.joss.17-0124

Abstract

Abstract: The kinetic characteristics of microorganism model moving in different surfaces and flow field environments are simulated. The internal flow dynamics and the inherent mechanism of antifouling on microstructure surface are examined. The results indicate that for the static flow field, vortices are generated in the micro-pits as microorganism moves above microstructure surface. The velocity in the microstructure surface is greater than that in the smooth surface, and the strain rate and shear stress exerted on microorganism are relatively smaller resulting in the rapid passing the microstructure surface. For the dynamic flow field, the flow field presents regular fluctuations in the near-wall region. Microorganisms are affected by larger strain rate and shear stress, thus more energy is needed to support microorganisms to slow down its speed to seek suitable attachment points resulting in increasingly difficult attachment. The reverse flow field has a better antifouling effect than the co-directional flow field.

Key words: microstructure, biofouling, flow field, vortex

CLC Number:

Li Chunxi, Xue Quanxi, Zhang Xiangshan, Ye Xuemin. Effect of Flow Field Environment on Microstructure Surface Preventing Microorganism Attachment[J]. Journal of System Simulation, 2019, 31(4): 687-695.

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