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I Pressure wave through liquid in pipe

  1. Aug 31, 2016 #1

    I'm a bit rusty with my fluid mechanics and can't seem to find the answer anywhere. Basically I have a pressure wave travelling in a liquid at the speed of sound through a pipe of the shape shown in the attachment (basically a semicircle of constant cross sectional area and then a cone of increasing area. At point A I know the wave has planar wavefront. Is there any formula to work out the shape of the wavefront at the end of the cone at point B, which I suppose will have a slight spherical curvature due to the changing cross-sectional size of the pipe?


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  3. Aug 31, 2016 #2


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    There isn't really "a formula" that you can use to determine this by just plugging some numbers in. You could solve the system pretty accurately by modeling it with a wave equation and letting the wave propagate through your geometry to see how it ends up. That's quite a bit more involved than just using a formula to spit out an answer, though.
  4. Aug 31, 2016 #3
    Do you happen to know if a software like COMSOL or other similar programs can perform such analysis numerically?

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