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Results tagged with fluid-dynamics
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user 9062
The quantitative study of how fluids (gases and liquids) move.
5
votes
2
answers
2k
views
How much more effective is it to stir in both directions?
I have been told that industrial mixing machines (say, for cake batter) switch directions periodically, first stirring in one direction, then the other, because this mixes the material more thoroughly …
- 2,707
11
votes
3
answers
784
views
What is the microscopic picture for warm air rising?
The usual explanation for warm fluids rising past cooler ones is that the warmer fluid has a lower density. I'm trying to understand what this looks like at a molecular scale. The density seems to b …
- 2,707
18
votes
4
answers
2k
views
Why is exhaling more forceful than inhaling?
By blowing at pencil, a piece of paper, or another object up to fifty centimeters away, I can cause it to move away from me significantly. But I can't move an object toward myself by inhaling sharply …
- 2,707