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The quantitative study of how fluids (gases and liquids) move.
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Accepted
Why does my tea periodically alternate its rotational speed after stirring? (Link to video b...
You have created a Lissajous spiral from the tea: the raising of the mixing utensil creates a partial secondary flow which deviates some of the concentric flow up and down. The continuous rotational f …
1
vote
Why does a chimney sometimes create a "draft"?
Airflow around buildings and over walls can compress air at the top of the roof at higher pressure and bring low pressure at the sides of the house and the shielded zones.
If the chimney has very cold …