中国物理B ›› 2017, Vol. 26 ›› Issue (8): 88203-088203.doi: 10.1088/1674-1056/26/8/088203

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

Anisotropic transport of microalgae Chlorella vulgaris in microfluidic channel

Nur Izzati Ishak, S V Muniandy, Vengadesh Periasamy, Fong-Lee Ng, Siew-Moi Phang   

  1. 1 Plasma Technology Research Center, Department of Physics, University of Malaya, Kuala Lumpur 50603, Malaysia;
    2 Center for Theoretical Physics, Department of Physics, University of Malaya, Kuala Lumpur 50603, Malaysia;
    3 Low Dimensional Materials Research Center, Department of Physics, University of Malaya, Kuala Lumpur 50603, Malaysia;
    4 Institute of Ocean and Earth Sciences, University of Malaya, Kuala Lumpur 50603, Malaysia
  • 收稿日期:2017-03-06 修回日期:2017-04-12 出版日期:2017-08-05 发布日期:2017-08-05
  • 通讯作者: Nur Izzati Ishak E-mail:izzati_91_ishak@siswa.um.edu.my
  • 基金资助:

    Project supported by the Science Fund from the Ministry of Higher Education of Malaysia under the Fundamental Research Grant Scheme (Grant No. FRGS: FP057-2014A) and the Fund from the University of Malaya Research Grant (Grant No. UMRG: RP020A-14AFR).

Anisotropic transport of microalgae Chlorella vulgaris in microfluidic channel

Nur Izzati Ishak1, S V Muniandy1,2, Vengadesh Periasamy3, Fong-Lee Ng4, Siew-Moi Phang4   

  1. 1 Plasma Technology Research Center, Department of Physics, University of Malaya, Kuala Lumpur 50603, Malaysia;
    2 Center for Theoretical Physics, Department of Physics, University of Malaya, Kuala Lumpur 50603, Malaysia;
    3 Low Dimensional Materials Research Center, Department of Physics, University of Malaya, Kuala Lumpur 50603, Malaysia;
    4 Institute of Ocean and Earth Sciences, University of Malaya, Kuala Lumpur 50603, Malaysia
  • Received:2017-03-06 Revised:2017-04-12 Online:2017-08-05 Published:2017-08-05
  • Contact: Nur Izzati Ishak E-mail:izzati_91_ishak@siswa.um.edu.my
  • About author:0.1088/1674-1056/26/8/
  • Supported by:

    Project supported by the Science Fund from the Ministry of Higher Education of Malaysia under the Fundamental Research Grant Scheme (Grant No. FRGS: FP057-2014A) and the Fund from the University of Malaya Research Grant (Grant No. UMRG: RP020A-14AFR).

摘要:

In this work, we study the regional dependence of transport behavior of microalgae Chlorella vulgaris inside microfluidic channel on applied fluid flow rate. The microalgae are treated as spherical naturally buoyant particles. Deviation from the normal diffusion or Brownian transport is characterized based on the scaling behavior of the mean square displacement (MSD) of the particle trajectories by resolving the displacements in the streamwise (flow) and perpendicular directions. The channel is divided into three different flow regions, namely center region of the channel and two near-wall boundaries and the particle motions are analyzed at different flow rates. We use the scaled Brownian motion to model the transitional characteristics in the scaling behavior of the MSDs. We find that there exist anisotropic anomalous transports in all the three flow regions with mixed sub-diffusive, normal and super-diffusive behavior in both longitudinal and transverse directions.

关键词: Brownian motion, anomalous transport, scaled Brownian motion, microfluidic, Chlorella vulgaris

Abstract:

In this work, we study the regional dependence of transport behavior of microalgae Chlorella vulgaris inside microfluidic channel on applied fluid flow rate. The microalgae are treated as spherical naturally buoyant particles. Deviation from the normal diffusion or Brownian transport is characterized based on the scaling behavior of the mean square displacement (MSD) of the particle trajectories by resolving the displacements in the streamwise (flow) and perpendicular directions. The channel is divided into three different flow regions, namely center region of the channel and two near-wall boundaries and the particle motions are analyzed at different flow rates. We use the scaled Brownian motion to model the transitional characteristics in the scaling behavior of the MSDs. We find that there exist anisotropic anomalous transports in all the three flow regions with mixed sub-diffusive, normal and super-diffusive behavior in both longitudinal and transverse directions.

Key words: Brownian motion, anomalous transport, scaled Brownian motion, microfluidic, Chlorella vulgaris

中图分类号:  (Disperse systems; complex fluids)

  • 82.70.-y
05.40.-a (Fluctuation phenomena, random processes, noise, and Brownian motion) 83.80.Hj (Suspensions, dispersions, pastes, slurries, colloids)