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Pattern Formation in Microorganism Suspensions: Shear and Confinement

Final Report Summary - PFMS (Pattern Formation in Microorganism Suspensions: Shear and Confinement)

This report summarizes research activities and academic achievement of the fellow, Dr. Yongyun Hwang, from 1st September 2012 to 8th October 2013, by carrying out the project `Pattern formation in microorganism suspensions: shear and confinement'. The project leads the fellow to a permanent academic position, thus it is terminated in the middle of progress.

The research activities for the period have been focused on understanding the role of external shear flow in a collective behaviour of swimming gyrotactic microorganism suspensions by performing mathematical and computational analysis of the state-of-the-art continuum model. A summary of the research activities is as follows:

1. Gaining fundamental understanding and prediction on the role of uniform shear in bioconvection pattern in gyrotactic swimming microorganism suspensions;
2. Elucidating the physical mechanisms of the blip instability observed in downflowing gyrotactic swimming microorganism suspensions (currently in progress)

The research activities leads the fellow to the following academic achievement:
1. Two scientific papers are expected in peer-review journals, one of which is already accepted and the other is currently submitted. In particular, the first paper will appear in the Journal of Fluid Mechanics, the leading journal in fluid mechanics,
2. Attended four international and domestic conferences to interact with internationally renowned academics in the field,
3. Gave four invited talks at academic institutions such as University of York, Imperial College London, University of Manchester, and University of Cambridge,
4. Have been established research activities in the field of biological fluid mechanics and have been developing collaboration with academics at University of York (M. A. Bees), University of Oxford (Dr. W. M. Durham) and University of Cambridge (Dr. O. A. Croze).
5. Gained a permanent academic position at Imperial College London.

For further information, see the attached.