The results show that the interaction between a viscousvortex ring and a free surface is different from the inviscid one.
结果表明：由于粘性的存在，使得涡环与自由表面的相互作用与无粘情形相比有许多不同。
2
The SV-pumps are equipped with Vortex impellers, undoubtedly the best non-clog impellers ever invented for the handling of mud, raw sewage, viscous liquids, rags, wood chips and other solids.
泵配有旋涡叶轮，是最好的无堵塞叶轮，用于进行泥浆，未经处理的污水，粘稠液体，破布，木屑和其他固体。
3
When waves act on a vertical cylinder, there are in-line and lift forces. They are caused by the viscous effect, which induces the surface frictional force and flow separation and vortex shedding.