irrotational flow

例句：

1. 1. The flow of the river is irrotational, meaning it doesn't create any swirling or twisting patterns.
   河流的流动是无旋涡的，意味着它不产生任何旋转或扭曲的模式。
2. 2. The study of irrotational flow is important for understanding how fluids move through complex geometries.
   研究无旋涡流动对于理解流体通过复杂几何形状的运动非常重要。
3. 3. In aerodynamics, irrotational flow is used to model the flow around objects in a fluid, suchas air or water.
   在空气动力学中，无旋涡流动被用来模拟物体周围的流体流动，如空气或水。