Abstract
A stirred-tank reactor is used as a unit operation in many chemical plants, and is used not only for mixing but also promotion of heating, cooling and reaction. The performance depends on characteristic of vortices formed in a stirred-tank. This investigation was conducted aiming at better understanding of the 3-dimensional structure of vortex flow formed there. The flow visualization and PIV measurement suggested the spiral structure and bifurcation of vortices mainly depending on the liquid height in the tank.
