对在Giesekus流体中凸壁附近游泳的微生物的数值研究
Chenlin Zhu1, Fangyuan Peng2, Dingyi Pan2
1China Jiliang University, Key Laboratory of Intelligent Manufacturing Quality Big Data Tracing and Analysis of Zhejiang Province, Hangzhou 310018, China.
Physical review. E
|February 20, 2025
概括
粘弹性流体中的微生物运动表明,虫更容易被凸起的墙壁所吸引. 流体弹性阻碍了逃逸,下壁曲率降低了颗粒离开的可能性.
科学领域:
- 流体力学的流体力学
- 微生物的运动 微生物的运动
- 粘性弹性 粘性弹性
背景情况:
- 微生物在复杂流体中的运动是流体力学的一个关键领域.
- 了解边界附近的粒子行为对于各种应用至关重要.
研究的目的:
- 在Giesekus粘弹性流体中,沿着凸起的墙壁调查squirmer运动.
- 分析流体弹性和壁曲率对粒子动态的影响.
主要方法:
- 用虚构域方法进行数值模拟.
- 在凸边界附近的Giesekus粘弹性流体中模拟的squirmer粒子.
主要成果:
- 观察到三种不同的行为:散射,前进轨道和后向轨道.
- 与牛顿流体相比,粘弹性流体对墙壁的吸引力增加了.
- 弹性应力诱导了反向扭矩,改变了运动,并阻碍了墙壁的逃逸.
结论:
- 流体弹性显著影响着者与墙壁的相互作用.
- 墙壁曲率在粒子逃逸动态中起着重要作用.
- 这些发现为微游泳者在复杂,弹性环境中的行为提供了洞察力.
相关概念视频
Microbial Growth Measurement: Indirect Methods
Estimating microbial growth is essential for understanding population dynamics and environmental adaptations. Indirect methods provide valuable insights by measuring parameters such as turbidity, metabolic activity, and biomass, enabling efficient and reproducible assessments.During exponential growth, microbial cells scatter light proportionally to their biomass, a principle used in turbidity measurements. About one million cells per milliliter produce detectable scattering, which a...
Marine Microbial Ecology
Marine microbial ecosystems are shaped by distinct physicochemical limits, including high salinity, low nutrient availability, and fluctuating oxygen levels. These conditions favor smaller microbial cell sizes, which maximize their surface-to-volume ratio for efficient nutrient uptake.Microbial activity and community composition are closely linked to biogeochemical cycles, particularly in dynamic environments like estuaries, where halotolerant microbes thrive in response to variable salinity...
Deep Sea Microbial Ecology
The deep ocean and its underlying sediments represent vast, largely unexplored microbial habitats that extend far beyond the sunlit photic zone. The photic (euphotic) zone typically spans the upper ~100–200 meters of pelagic waters in the open ocean, but its depth varies geographically and seasonally, where sufficient light supports photosynthetic life. Below this lies the deep sea, spanning roughly 1000–6000 meters (bathypelagic to abyssal zones), with deeper hadal trenches extending beyond...


