论文标题
不可压缩的挤压膜悬浮
Incompressible Squeeze-Film Levitation
论文作者
论文摘要
横向振动可以通过挤压膜效应诱导空气薄膜的非线性压缩以悬浮物体。雷诺的润滑理论很好地捕获了这种现象，但是，当流体不可压缩时，相同的理论无法描述这种悬浮。在这种情况下，计算预测没有稳态悬浮，与已记录的实验证据相矛盾。在这封信中，我们发现了不可压缩的流体薄膜中时间平均压力不对称的主要来源，导致悬浮现象存在。此外，我们揭示了管理稳态悬浮高度的物理定律，我们通过实验确认。
Transverse vibrations can induce the non-linear compression of a thin film of air to levitate objects, via the squeeze film effect. This phenomenon is well captured by the Reynolds' lubrication theory, however, the same theory fails to describe this levitation when the fluid is incompressible. In this case, the computation predicts no steady-state levitation, contradicting the documented experimental evidence. In this letter, we uncover the main source of the time-averaged pressure asymmetry in the incompressible fluid thin film, leading the levitation phenomenon to exist. Furthermore, we reveal the physical law governing the steady-state levitation height, which we confirm experimentally.
