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B Siphon Question

  1. May 11, 2016 #1
    What affects how fast the water come out of the tube?(size of tube, size of opening where the water enters, etc) thanks in advance.
     
  2. jcsd
  3. May 11, 2016 #2

    berkeman

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    Staff: Mentor

  4. May 11, 2016 #3
    Well my first thought is that the size of the tube is what would affect the flow rate. So if I wanted to increase the flow rate I would have to increase size of the hose, but what I am not to sure about is could I make it flow faster just by increasing the size of the first part of the tube? I would have to imagine that to some degree if you had a big enough tube and connected to a smaller tube it would flow faster. Maybe not fast enough to be similar to what would come out of a hose bid, but I am thinking it should be faster because there would be more water "behind" the smaller tube. But then again I know for water to faster through a smaller tube there has to be enough pressure to behind the smaller tube to actually push the water and not just siphon water(basics of a pressure washer). So is it possible to increase the flow rate by just increasing part of the tube?
     
  5. May 12, 2016 #4

    berkeman

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    The pressure comes from the "head" or difference in heights of the two water surfaces. Using a bigger tube allows more water to flow for a given height difference. If the tube necks down, you still have the same pressure pushing the water, but less area to let the water flow through.

    https://myelms.umd.edu/courses/969642/files/27532357?module_item_id=6128404
     
  6. May 12, 2016 #5
    Well that sucks. Thanks for your help.
     
  7. May 12, 2016 #6

    berkeman

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    Funny double-meaning! :smile:
    you're welcome.
     
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