Universal self-scalings in a micro-co-flowing

On hypothesis of self-scaling co-flows in tapered rectanglar PMMA micro-channels for producing mono-dispersed liquid cells, universal scalings through all liquid detaching regimes are found under a self-similarity frame. Pan-dripping and Pan-jetting regimes are calculated clearly to border at the Weber number approximately $1$ and the capillary number approximately $0.28$ by machine learning classification. The sizes, as well as detaching frequencies, of liquid cells in different flow regimes behave at the same manner and submit to the same law, and such highly consistent behaviors breaking through physical barriers among flow regimes have never been reported.

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