Why do shower curtains blow inwards?

  • Thread starter alw34
  • Start date
  • #26
47
5
That can't be. Besides the fact that the drain opening is tiny and a significant cross section is covered with water, the drain is trapped specifically to prevent airflow in the other direction. When you partly fill up a previously empty pipe with water, the air has to go out.
Hey Russ, you really missed the point on this reply. He did not say a word about air flowing up through the drain pipe. He said make-up air has to flow into the base of the shower, hence the inward pulling of the shower curtain. Drains were not mentioned or implied.
 
  • #27
NascentOxygen
Staff Emeritus
Science Advisor
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It should be a simple matter to sticky tape some light-weight ribbons to a shower curtain, like the streamers seen on the sails of some yachts, to highlight the air flow. Direct the water away from the curtain so the ribbons aren't immediately dampened.
 

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