Development of a mixer without impellers as an application of a precessing cavity

旋转物体的自旋轴的旋转运动称为“旋进”。研究表明，空腔的弱进动可导致封闭流体的强湍流。为了利用旋进的这一特征开发一种新型的无叶轮混合器，我们对旋进球体和椭球体中的流动进行了实验室实验和数值模拟。然后，我们揭示了适当的控制参数的组合，和适当的形状的空腔，以维持强湍流的旋进腔。

The rotational motion of the spin axis of a rotating object is called the "precession". It has been shown that a weak precession of a cavity can lead to strong turbulence of the confined fluid. Aiming to develop a new type of mixer without impellers on the basis of this feature of precession, we have conducted laboratory experiments and numerical simulations of flow in a precessing sphere and in a spheroid. We have then revealed the appropriate combination of control parameters, and the appropriate shape of the cavity to sustain strong turbulence in a precessing cavity.