Memorial Tributes Volume 10 (2002) / Chapter Skim
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Chia-Shun Yih
Chia-Shun Yih
Pages 264-275
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From page 265... ...
He devised efficient methods of calculations. He discovered many exact or closed form solutions of waves and instabilities in fluid flow, and of course also many approximate solutions.
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From page 266... ...
Our college years were spent in makeshift classrooms and laboratories, classes at the crack of dawn to avoid air raids, long hours in the dugouts, military training, and an endless stream of exciting or sad news. One wintry day, Japanese planes came and bombed out our simple shower hut, and for weeks afterward some of us had to bathe in the emerald water of the nearby Chia-Ling River, beautiful but cold.
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From page 267... ...
We were among the forty-two, and in 1945 we came to the United States via India. After a brief stay at Purdue University, Chia-Shun went to the University of Iowa to study fluid mechanics with Hunter Rouse and tohn McNown, with whom he maintained a warm friendship throughout his life.
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From page 268... ...
Timoshenko Distinguished University Professor of Fluid Mechanics. In 1970 he was elected a member of Academia Sinica.
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From page 269... ...
These studies were followed by a series of papers dealing with atmospheric diffusion, gravitational convection from a boundary source, turbulent buoyant plumes, buoyant plumes in a transverse wind, etc. His characteristic approach was to fins!
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From page 270... ...
infinitely many superposable solutions of the Navier-Stokes equations, and (c) aclded masses: the kinetic energy mass, momentum mass, and drift mass in steady irrotational subsonic flows, and in periodic water waves and sound waves, and (~)
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From page 271... ...
The second category of Oh's papers on the theory of hydrodynamic stability consists of a series of fundamental papers on two-dimensional parallel flow for three-dimensional disturbances, the stability of unsteady flows or configurations, eigenvalue bounds for the Orr-Sommerfeld equation, electrically conducting fluids, non-Newtonian fluids, viscosity stratification, and thermal conductivity stratification. This series of basic papers includes his solutions of a number of aeronautical, civil, and manufacturing engineering problems.
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From page 272... ...
He added to a swirling horizontal flow of a fluid a core of another fluid of different density and temperature, and a mode} of a tornado is obtained. In his head, he worked out the mathematical facets of how a core can lead the weather condition at a high altitude to the ground, how the horizontal swirling will generate the maximum speed at the surface of the core at the ground level, how the cyclonic action would cause the tornado to spin counterclockwise looking down toward the earth in the northern hemisphere,
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From page 273... ...
He chose a 1946 photograph of a wheat field in western Kansas to illustrate the dynamics of nonhomogeneous fluids and a thirteenth century Chinese painting of a tidal bore to illustrate fluid mechanics, and he quoted the poems of La Fontaine, Li Chong Chu, and Fung Yen Ci to introduce various topics in fluid mechanics. Such a poetic mind was his!
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From page 274... ...
Ah, C.S.1990. "Infinitely Many Superposable Solutions of the Navier-Stokes Equations: Damped Beltrami Flows." In Of Fluid Mechanics and Related Matters, proceedings of a symposium honoring John Miles on his 70th birthday, December 1990.
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From page 275... ...
1997. "The Role of Drift Mass in the Kinetic Energy and Momentum of Periodic Water Waves and Sound Waves." fournal of Fluid Mechanics, 331:429-438.
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