Since the tape prevents leakage, isn't it in contact with the water flow by defi... | Hacker News

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		amelius on Aug 14, 2022 \| parent \| context \| favorite \| on: It’s raining PFAS: rainwater is unsafe to drink ev... Since the tape prevents leakage, isn't it in contact with the water flow by definition?

8note on Aug 14, 2022 [–]

Kinda. Water has a skin effect where at the surface it doesn't move, only acts as a lubricant of sorts for water in the middle of the pipe

amelius on Aug 14, 2022 | [–]

Interesting. What does that mean for the diffusion of contaminants? Does the boundary between these two regions act as a barrier for diffusion?

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