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TURBULENCE SUSTAINED IN A PRECESSING SPHERE AND SPHEROIDS

Susumu Goto
Department of Mechanical Engineering, Okayama University, 3-1-1, Tsushimanaka, Okayama, 700-8530, Japan; Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka, 560-8531 Japan

Masahiro Fujiwara
Department of Mechanical Engineering, Okayama University, 3-1-1, Tsushimanaka, Okayama, 700-8530, Japan

Masahiro Yamato
Department of Mechanical Engineering, Okayama University, 3-1-1, Tsushimanaka, Okayama, 700-8530, Japan

要約

When a vessel filled with fluid is weakly precessing, developed turbulence is sustained in it. This interesting feature is quite attractive in engineering applications such as the effective turbulent mixing in a smooth cavity. The aim of our study is, for such applications, to clarify, experimentally, the suitable parameters (the rate of the precession, for example) and the effective shape of the vessel to produce strong turbulence.