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A Tesla Valve

en.wikipedia.org Reference Encyclopedia entries Mathematics & science Candidate
Screenshot of en.wikipedia.org captured 2026-07-20
Page preview · captured 2026-07-20

Resurfaced independently across 3 calendar years, with breakout response in 2 of them.

submissions
3
submitters
3
observed span
2015–2021
peak thread · 42 comments
197 pts
latest 20+ return · 2021-08-12
100 pts

Submission timeline

2007–2026

One slot for every year since HN launched. Height is that year's peak points; orange marks a 100+ point or 50+ comment breakout. Select a bar to open its strongest thread.

First comments on top threads

HN comment order

I’m assuming this is being posted due to this recent popular video, which I think is a very well made demonstration of how the valve works: https://www.youtube.com/watch?v=tcV1EYSUQME

For a fun visual demonstration, check out nighthawkinlight's video where he runs a flamefront through one -- https://www.youtube.com/watch?v=tcV1EYSUQME Also seconding the Huygen's optics video osamagirl69 already posted below -- https://www.youtube.com/watch?v=gQnmP7UD_zk

The first top-level comment from each of the four biggest threads, in HN’s own order. Excerpts are shortened; open a comment for full context.

Breakout years
2

100+ points or 50+ comments

Total points
305

reference only — not used in Hall rules or ranking

Total comments
82

reference only — not used in Hall rules or ranking

Every submission

DateTitle as submittedByPointsComments
2015-05-24Tesla valveshocks80
2019-12-18A Tesla ValveFirst breakout · Best threadstazz119742
2021-08-12Tesla valveLatest 20+ point returnJeff_Brown10040