Hoot Tube

  • Principle Illustrated: Resonance of open pipe, turbulent flow effects

    Hoot pic

    A one meter tube has copper screen placed near one end. The copper screen is heated with a butane flame. Turbulent flow set up from the hot screen drives a low-order resonant mode in the tube. Tilting the tube from the vertical disrupts the flow and causes the tone to subside.

    • This demo can be found in cabinet C on shelf 2 of the UCSD PUL Demo Room (WLH 2015).