区带离心机转子中的传输现象。I. 加速过程中流体的速度和剪应力分布
Transport phenomena in zonal centrifuge rotors. I. Velocity and shear-stress distributions of fluid during acceleration.
作者信息
Hsu H W
出版信息
Biophys J. 1968 Sep;8(9):973-90. doi: 10.1016/S0006-3495(68)86533-6.
An analysis is presented for the evaluation of velocity components and shear-stress distributions of fluid in zonal centrifuge rotors during acceleration. Analytical expressions for the distribution of tangential and radial velocity components and the tangential shear-stress and the radial shear-stress distributions of fluid are obtained for the transient case. Characteristics of each distribution for a typical density gradient liquid in a zonal centrifuge rotor are computed from the relations derived, and are presented as figures. An unusual phenomenon-the tangential velocity of the gradient exceeding the velocity of the rotor during a particular period of acceleration-is demonstrated.
本文给出了一种分析方法，用于评估区域离心机转子在加速过程中流体的速度分量和剪切应力分布。得到了瞬态情况下流体切向和径向速度分量分布以及切向剪切应力和径向剪切应力分布的解析表达式。根据推导得到的关系式，计算了区域离心机转子中典型密度梯度液体各分布的特性，并以图表形式给出。文中展示了一种不寻常的现象——在特定加速阶段，梯度的切向速度超过了转子的速度。
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