In the serosal cavities (e.g. pleural, pericardial) soft tissues slide against each other, lubricated by thin fluid. We used rotational devices to study the tribology of such tissues, which appear to exhibit mixed and hydrodynamic lubrication. To explore mechanism, we modeled the interaction of fluid and soft material in 3D using a simple cylindrical geometry with an uneven solid-fluid interface in rotation. Deformation of the solid, frictional force, and fluid thickness are presented as a function of applied rotational velocity, applied normal load and material properties. The results suggest that the deformation caused by hydrodynamic pressure leads to load-supporting behavior.

中文翻译：

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软生物组织弹性流体动力润滑的有限元模拟

在浆膜腔（例如胸膜、心包）中，软组织相互滑动，被稀薄的液体润滑。我们使用旋转装置来研究这些组织的摩擦学，这些组织似乎表现出混合和流体动力润滑。为了探索机制，我们使用简单的圆柱几何体在 3D 中对流体和软材料的相互作用进行了建模，该几何体在旋转时具有不均匀的固-流体界面。固体的变形、摩擦力和流体厚度表示为施加的旋转速度、施加的法向载荷和材料特性的函数。结果表明，由流体动压引起的变形导致负载支撑行为。