Chia-Shun Yih

Our good friend and colleague Chia-Shun (Gus) Yih passed away on April 24, 1997. He fell ill en route to Tokyo, Japan and passed away shortly after landing of acute heart failure. He is survived by his wife Shirley, daughter Katherine, sons Yiu-Yo and David, two sisters, and three grandchildren.

He will be deeply missed by all who knew him.

Obituary (written by David) AA News, 29 Apr 97

Those wishing to respond directly to Shirley can do so at:
77 Pond Ave, Brookline, MA   02445-7141

Preface from Selected Papers by Chia Shun Yih
With permission. Copyright @ 1991 World Scientific Publ. Co.
This includes comments by Sung-Piau Lin, W. Michael Lai, C.C. Lin, Yuan-Cheng Fung,
George Batchelor, and Stephen H. Davis.

Doctoral Students of Professor Chia-Shun Yih
Excerpt from "Wintersweet," by Chia-Shun Yih
Technical symposium memorial celebration July 31, 1997
Photo of Chia-Shun Yih Symposium Participants (1985)
Please view or sign the guestbook
Maps to and of Ann Arbor

Chia-Shun Yih Seminar

Emil Hopfinger,  University of Grenoble

Atomization of a Liquid Jet by a Coflowing Gas Stream:
From Interfacial Instability to Drop Formation


      Break-up and atomization of liquid surfaces or liquid/gas interfaces have widespread applications, ranging from two phase combustion to household sprays. For this reason, atomization and related problems have received considerable attention and various correlations, relating for instance the drop size to the flow variables, have been proposed. Recent, more deterministic approaches, aimed at understanding the mechanisms, attempted to relate the drop size to the relevant instabilities. The present talk will be focused on these, more deterministic studies.

     After a rapid discussion of the different types of liquid jet instabilities and the relevant governing parameters, experimental results on Kelvin-Helmholtz instability of a gas/liquid shear layer will be presented. These results, together with a stability analysis, clearly show that when the gas momentum flux is large, the most amplified wavelength of this primary instability is controlled by the vorticity layer of the gas jet at the nozzle exit. However, no direct relationship between the droplet size and this wavelength emerges. The mean droplet size is rather related with the wavelength of a secondary, transverse instability. Various secondary instability scenarii have been proposed, the most likely one being a Rayleigh-Taylor instability of the liquid crests resulting from the primary instability. Recent experimental results will be presented which support such a Rayleigh-Taylor instability mechanism leading to droplet formation.


4:00pm October 10, 2003

in the Chesebrough Auditorium, Chrysler Center


This also is the Mechanical Engineering Sesquicentennial Lecture. A reception in the Chesebrough lobby will immediately follow the lecture.


Previous Speakers:

·         Walter Munk, “Spirals on the Sea”

·         Lou Howard, FSU, "Steady rotating flow: mathematical structure and an example"

·         Y.C. (Bert) Fung

·         C.C. Lin

·         Owen Phillips

·         George Batchelor

·         Russell Donnell

For more info contact:
Bill Schultz
The University of Michigan
Dept. of Mechanical Engineering & Applied Mechanics
2027 Auto Lab
Ann Arbor, MI 48109-2121
Phone (734) 936-0351