In extensional flow fiber tended to perpendicularity to the streamline, while in shear flow and convergent flow fiber tended to parallel to the streamline in the thin wall caving.

• 在薄壁型腔的扩张流中，短纤维趋于与流线方向垂直，而在剪切流和收敛流中趋于与流线方向一致。