- #1
ROGER WALL
- 3
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Hello, I don't know anything about fluid dynamics and hope someone can tell me what it is I saw the other day. I work in yoghurt factory and had to throw out a whole vat full of product (the culture died). So i pumped the product thru a say 70mm hose and poured it into a waste bin (which was being sucked out from the bottom as I filled it up - don;t know if this has something to do with it - don't think so).
Anyway as i stood mesmerised (took 20min to dispose of all the yoghurt) i noticed that a void existed around the round stream of yogurt coming out of the hose as it entered the pool of yoghurt in the container. Being a white liquid (as oppes to looking a water) it was easy to see this 0.5mm - 1mm void around the stream of yoghurt as it formed a dark shadow.
Also the yohurt in the pool was sucked down the 'outside' of the void - proabaly not surprising - like water going down a drain hole.
SO this void - does it have a name (fancy name not just surface tension, etc). Is this phenominar used for anything? Thanks, ROger.
Anyway as i stood mesmerised (took 20min to dispose of all the yoghurt) i noticed that a void existed around the round stream of yogurt coming out of the hose as it entered the pool of yoghurt in the container. Being a white liquid (as oppes to looking a water) it was easy to see this 0.5mm - 1mm void around the stream of yoghurt as it formed a dark shadow.
Also the yohurt in the pool was sucked down the 'outside' of the void - proabaly not surprising - like water going down a drain hole.
SO this void - does it have a name (fancy name not just surface tension, etc). Is this phenominar used for anything? Thanks, ROger.
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