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“进动”。结果表明，腔体的弱进动会导致受限流体的强湍流。为了开发一种基于进动特性的新型无叶轮混合器，我们对进动球体和球体内的流动进行了实验室实验和数值模拟。然后，我们揭示了控制参数的适当组合，以及在进动腔体中维持强湍流的适当腔体形状。

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.