School of Physics Colloquium

Event Details
  • Date/Time:
    • Monday November 28, 2022
      3:00 pm - 4:00 pm
  • Location: Marcus Nanotechnology Bldg. Room: 1116-1118
  • Phone:
  • URL:
  • Email:
  • Fee(s):
    N/A
  • Extras:
Contact
No contact information submitted.
Summaries

Summary Sentence: School of Physics Colloquium feat. Stephen Morris (Uni. of Toronto)

Full Summary: SpeakerStephen W. Morris Affiliation: University of Toronto HostProf. Dan Goldman Title: Why are there ripples on icicles? Abstract: The shape of an icicle emerges from a subtle feedback between ice formation, which is controlled by the release of latent heat, and the flow of water over the evolving shape.  The water flow, in turn, determines how the heat flows.  Many natural icicles exhibit a mysterious ripply shape, which is thought to be the result of a morphological instability.  The wavelength of the ripples is always close to 1cm, and is remarkably independent of the growing conditions.  Similar ripples are also observed on stalactites, although certain details of their formation differ.  We built a laboratory icicle growing machine to explore the physics of icicle ripples. We learned the subtle role played by impurities, and succeeded in deepening the mystery of the origin of the ripples. Work done with Antony Szu-Han Chen and John Ladan.  

Title: Why are there ripples on icicles?

Abstract: The shape of an icicle emerges from a subtle feedback between ice formation, which is controlled by the release of latent heat, and the flow of water over the evolving shape.  The water flow, in turn, determines how the heat flows.  Many natural icicles exhibit a mysterious ripply shape, which is thought to be the result of a morphological instability.  The wavelength of the ripples is always close to 1cm, and is remarkably independent of the growing conditions.  Similar ripples are also observed on stalactites, although certain details of their formation differ.  We built a laboratory icicle growing machine to explore the physics of icicle ripples. We learned the subtle role played by impurities, and succeeded in deepening the mystery of the origin of the ripples.

Work done with Antony Szu-Han Chen and John Ladan.

Additional Information

In Campus Calendar
No
Groups

School of Physics

Invited Audience
Faculty/Staff, Postdoc, Public, Graduate students, Undergraduate students
Categories
No categories were selected.
Keywords
No keywords were submitted.
Status
  • Created By: arcs-stuweb03
  • Workflow Status: Published
  • Created On: Nov 18, 2022 - 3:40pm
  • Last Updated: Nov 22, 2022 - 7:30pm