国際宇宙ステーションのインスタグラム(iss) - 9月30日 01時19分

Happy National Coffee Day! ☕️
#TBT to one year ago today, when Astronaut Kjell Lindgren hand-brewed coffee aboard the space station. The Space Cup isn’t just cool looking, it’s scientific! Astronauts typically drink their coffee through straws in drinking bags. The Space Cup exploits surface tension, wetting conditions and the special geometry of the cup itself to keep the liquid contained, while allowing crew members to sip – and smell – their brew. A capillary connection, almost like the wicking of water through a paper towel, is activated when lips are placed on the rim of the cup, allowing the drinker access to the entire contents. Many of the aspects of our fluid physics research in microgravity are present in this simple cup demonstration — the effects of wetting, the effects of geometry, and the effects of fluid properties, especially surface tension. The results could provide information useful to engineers who design fuel tanks for commercial satellites, for instance. With this cup we can also study complex fluids that we have not previously addressed.
#nationalcoffeeday #coffee #space #spacestation #research

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