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Interesting Phenomena on my Windshield

  1. Dec 27, 2012 #1
    So I was driving my dads truck to pick up my sister when I noticed a very interesting pattern in the raindrops sliding across the truck windshield. It was not raining, but I am currently in the northeast and we just got done with a snowstorm so they really weren't raindrops but simply melted snow... Anyway, I observed that the "raindrops" tended to follow a zigzag pattern as they climbed the windshield. This wasn't one path in particular, many of them seemed to move like recognized swimmers akin to a "glider" in the Game of Life. Here is a picture from Wikipedia: Gospers_glider_gun.gif

    It was very fascinating, so much so that I almost missed my exit! I am not sure if the fact that I was following a tractor trailer makes a difference. Perhaps the vortex shedding frequency behind the trailer had something to do with the water pattern on the windshield.

    Does anyone have any idea what would be causing this pattern?
     
  2. jcsd
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