22 Jul '16, 5pm

Fail of the Week: Ferrofluid

Fail of the Week: Ferrofluid

It’s more of a half-fail than a full fail, but [Basti] is accustomed to getting things right (eventually) so it sticks in his craw that he wasn’t able to fully realize his ferrofluid dreams (German, translated here ). Anyway, fail or demi-fail, the project is certainly a lesson in the reality of ferrofluid. We’ve all seen amazing things done with ferrofluid and magnets. How hard can it be to make an interactive ferrofluid wedding present for his sister? Where ferrofluid spikes climb up a beautifully cut steel heart in a jar? (Answer: very hard.) First off, ferrofluid is expensive, and estimating the right amount for the project is tricky. [Basti] got 20 ml. Next, it stains everything in the way that only suspended nano-particles of rust can. Simulations, like every other tool, are useful but in certain strange applications (like moving ferrofluid around in a bottle) are on...

Full article: http://hackaday.com/2016/07/22/fail-of-the-week-ferrofluid/

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