李鴻源2006-07-252018-07-092006-07-252018-07-091998http://ntur.lib.ntu.edu.tw//handle/246246/9872關於圓球顆粒自由沉降運動之研究,多以阻力係數(Cd)和雷諾數(Re)的關係呈現,即「標準阻力係數曲線」(standard drag curve),本文在雷諾數102與104 之範圍內,利用本研究小組研發之「動態影像數位化系統」量測終端速度,得出二組新的對應迴歸式,以求解終端速度。根據實驗數據,發現單一顆粒圓球在流體中自由沉降時,瞬時之橫向與重力作用之垂向速度的週期有2:1(橫向:重力作用方向)的比例關係。According to these investigations, an implicit relation between Cd(drag coefficient) and Re(Reynolds number),also named as the standard drag curve. Using self-developed “Dynamic Image Digitalization System”, we got two new regressed curve for estimating terminal velocity. In basis of experiment data, the ratio of the period of the velocity in lateral direction to the period of the velocity in gravitational direction is 2:1.application/pdf104529 bytesapplication/pdfzh-TW國立臺灣大學水工試驗所終端速度橫向運動阻力係數Terminal Fall VelocityLateral MotionDrag Coefficient凝聚性沉滓水庫之排砂策略研究─水庫沉滓沉降行為之研究reporthttp://ntur.lib.ntu.edu.tw/bitstream/246246/9872/1/872211E002049.pdf