@techreport{oai:jaxa.repo.nii.ac.jp:00040044, author = {吉原, 正一 and 東, 久雄 and 大西, 充 and Yoshihara, Shoichi and Azuma, Hisao and Onishi, Mitsuru}, month = {Dec}, note = {チョクラルスキイ結晶成長法モデルでの流れ速度を超音波を用いた手法で測定した。シリコンオイルと水銀をモデル流体として用い、広い範囲のレイノルズ数Re≒10(exp 2)〜10(exp 5)のもとで実験を行った。速度測定から流れの振動特性が得られ、温度差を与えない実験では異なった振動数の6つのグループが存在することが分かり、また水銀の場合については熱対流の振動数への影響が明らかになった。熱対流により、1つの振動数は2つに分かれ、レイノルズ数の増加につれて、2つの振動数の流れは合流し、カオス流が観測された。, Flow velocity in a Czochralski crystal puller model was measured by an ultrasonic technique. Silicone oil and mercury were used as model liquids and the experiments covered a wide range of Reynolds number Re equal or nearly equal to 10(exp 2)-10(exp 5). From the velocity measurements, oscillatory characteristics of the flow were obtained. Six groups of different frequencies of the oscillation were found to exist in the experiments without applying temperature differences. The influence of thermal convection on frequencies of the oscillation was clarified in the case of mercury. Due to the thermal convection, one frequency of the oscillation is divided into two frequencies. With increasing Reynolds number, the frequencies joined again and a chaotic flow was finally observed., 資料番号: AA0001325000, レポート番号: NAL TR-1343}, title = {回転流と熱対流による流動現象}, year = {1997} }