| Co-Investigator(Kenkyū-buntansha) |
KAMBE Tsutomu Facuety of Science, University of Tokyo, 理学部, 助教授 (60013679)
KUWAHARA Kunio Institute of Space and Aetronautical Science, 助教授 (40011118)
TAKAMI Hideo Faculty of Engineering, University of Tokyo, 工学部, 教授 (80010718)
KAWAHARA Takuji Faculty of Science, Kyoto University, 理学部, 助教授 (60027373)
KUWABARA Sinzi Faculty of Engineering, Nagoya University, 工学部, 教授 (30011589)
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| Budget Amount *help |
¥12,800,000 (Direct Cost: ¥12,800,000)
Fiscal Year 1987: ¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 1986: ¥3,900,000 (Direct Cost: ¥3,900,000)
Fiscal Year 1985: ¥5,500,000 (Direct Cost: ¥5,500,000)
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| Research Abstract |
The characteristics of various noninear problems associated with fluid motions have been clarified comprehensively through analytical, numerical, and experimeal studies.
1. Analytical studies; Diverse sets of equations have been derived for describing or modelling the fluid motion in an electromagnetic field, homogeneous thrbulence, vortons in a perfect fluid, shallow-water waves, etc., and have been solved analytically and numerically. The results of calculations, which agree well with existing experimental data, have been found to explain the relevant fluid-dynamical nonlinear processes effectively.
2. Numerical studies; Several numerical-simulation schemes for high-Reynolds-number flows and flows with a free surface have been developed on the basis of physical considerations. Using these numberical schemes, nonlinear properties have been examined in detail for the the following flows: flows past a cylinder, wing, sphere, and hill model; flows in a channel; flows solve and clarify more specific problems including: movemets and interactions of vorticity regions, flowpattern variations associated with thermal convection, a turbulent-dynamo effect, a supply of power in an inertial nuclear-fusion system, and flows in a gas centrifuge.
3. Experimental studies; Using various experimental and flow-visualization techniques, nolinear properties have been investigated and clarified of the following flow systems: flows between a rotating concentric cylinders, flows through a flexble tube, flows around a sinkhole, the acoustic emission generated by vortex motions.
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