Fluid Mechanics Seminar: Ching-Yao Chen

Topic

Experimental Studies on Self-Assembled Magnetic Microbeads and Ferrofluid Drops

Speakers

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Ching-Yao Chen
National Chiao-Tung University of Taiwan

Details

Experiments of magnetic particles and ferrodrops are carried out to study their motion in a static or dynamical field. A particle chain or drop array is firstly self-assembled in a directional field, and then manipulated by either an oscillating field or rotational field. Distinct behaviors of the oscillating chain, from rigid body oscillations and bending distortions to rupture failures, are observed by increasing the amplitudes of oscillating fields or chains’ lengths. The experimental results confirm a criterion to maintain a stable chain. In addition, an interesting phenomenon of trajectory shift is discovered and applied successfully to steer the moving orientations of microswimmers. On the other hand, driven by an external rotating field, a novel phenomenon of planetary motion, including double rotation of local self-spin of individual drops and the global orbital revolution of the drop array, is identified in arrayed ferrofluid drops. The global revolution of the drop array is driven by the interactions between the magnetized drops, undergoes a wave-like forth and back movement. Such double rotations can be applied to enhance mixings of two fluids more effectively than a single self-spin drop.

Additional Information

Location: ESB 2012

Ching-Yao Chen (National Chiao-Tung University of Taiwan)

 

Ching-Yao Chen is a full Professor at the Department of Mechanical Engineering, National Chiao Tung University (NCTU), one of the leading research universities in Taiwan. After earning a BS from National Chung-Hsing University in Taiwan, he studied at the Department of Aerospace Engineering, University of Southern California, where he received his MS and Ph.D. in 1992 and 1998, respectively. Before his return to Taiwan in 1999, Prof. Chen was a research associate at the University of Southern California and University of Electro-Communications (Tokyo). Professor Chen’s research interests lie in fundamental fluid dynamics, with an emphasis on interfacial instability. Recently he has extended his research to dynamics of ferrofluids and magnetic-particles. He has extensive experience in research on the dynamics and interfacial morphologies both by simulations and experiments. Many of his published papers have been highlighted in scientific magazine or selected to appear in journal poster. Professor Chen received the award as the Distinguished Young Scholar in Mechanics by the Society of Theoretical and Applied Mechanics (Taiwan) in 2010. He was the associate dean of NCTU’s Office of International Affairs in 2009~2010 and 2011~2013.

 


Jump to Event Details
This is a Past Event
Event Type
Scientific, Seminar
Date
November 13, 2014
Time
-
Location
University of British Columbia