Investigation of viscosity effects on bacteria collective motion using particle image velocimetry
Name
1003324280-MIT.pdf
Description
Full printable version
Size
9.39 MB
Format
Adobe PDF
Checksum (MD5)
4382b02dd9f74c9936f0b0768febf38e
Author(s)
Hu, Yinmeng, M. Eng. Massachusetts Institute of Technology
Advisor(s)
Ruben Juanes.
Date Issued
2017
Publisher
Massachusetts Institute of Technology
Abstract
Swimming bacteria are known to display collective motion resulting from their flagella propulsion. Various models of such collective behavior have been proposed, and different motion patterns are also well-documented. However, no previous research has investigated how contrasts in fluid viscosity would influence the collective motion of swimming bacteria. In this paper, Particle Image Velocimetry (PIV), a commonly-used method to measure nonintrusive, instantaneous and whole-field velocity, is applied to visualize the swimming patterns and behavior of Escherichia coli and Vibrio alginolyticus. Firstly, various PIV post-processing tools are examined; next, different PIV conditions are tested and post-processing methods are optimized to best visualize bacteria collective motion; finally, the influence of viscosity contrast on bacteria behavior is investigated, and the swimming patterns that result from injecting active suspensions of bacteria with fluids of different viscosity are investigated.
Description
Thesis: M. Eng., Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, 2017.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 70-72).
Subjects
Civil and Environmental Engineering.
MIT Department
Massachusetts Institute of Technology. Department of Civil and Environmental Engineering
Terms of Use
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