> Steady flow experiments, including with the original design, however, show smaller ratios of the two resistances in the range of 2 to 4. I looked at the link

> Steady flow experiments, including with the original design, however, show smaller ratios of the two resistances in the range of 2 to 4. I looked at the linked article [0] for this statement and I was hoping to see other passive check valve designs. But it mostly looked like the original Tesla design. Have there been optimizations of the design that achieve a better performance since the original Tesla design? [0] https://www.nature.com/articles/s41467-021-23009-y https://www.nature.com/articles/s41467-021-23009-y