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  • Feb
    7

    Leroy Jia: Axisymmetric membranes with edges under external force: buckling, minimal surfaces, and tethers

    McCormick School of Engineering and Applied Science

    4:00 PM

    EVENT DETAILS

    Title: Axisymmetric membranes with edges under external force: buckling, minimal surfaces, and tethers

    Speaker: Leroy Jia, Flatiron Research Fellow at Center for Computational Biology, Flatiron Institute

    Abstract: A timeless problem in the theory of fluid interfaces is to show that an area-minimizing soap film connecting two symmetric rings forms a catenoid. Inspired by the exotic phase transitions of colloidal membranes studied at the Sharma (IISc Bangalore) and Dogic (UCSB) Labs, we use theory and numerical computation to determine the shape of an axisymmetric fluid membrane with fixed area and bending resistance that is suspended in this classic geometry. This simple problem turns out to be surprisingly rich: various iconic shapes such as catenoids, thin tethers, and elastica-like buckled surfaces can appear as different limits of this system depending on the area and extension. A perturbation theory argument directly relates the tensions of catenoidal membranes to the stability properties of catenoidal soap films. We also investigate the effects of including a Gaussian curvature modulus, which, for small enough membranes, causes the axial force to diverge as the ring separation approaches its maximal value.

    **Please note, this event will be held online via Zoom at the following link: https://northwestern.zoom.us/j/95506901758.

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    TIME Monday, February 7, 2022 at 4:00 PM - 5:00 PM

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    CONTACT Ted Shaeffer    ted.shaeffer@northwestern.edu EMAIL

    CALENDAR McCormick School of Engineering and Applied Science

  • Sep
    8

    Welcome & Breakfast for New McCormick PhD Students

    McCormick School of Engineering and Applied Science

    9:00 AM LR2 & Tech East Plaza, Technological Institute

    EVENT DETAILS

    TIME Monday, September 8, 2025 at 9:00 AM - 10:00 AM

    LOCATION LR2 & Tech East Plaza, Technological Institute    map it

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    CONTACT Andi Joppie    andi.joppie@northwestern.edu EMAIL

    CALENDAR McCormick School of Engineering and Applied Science

  • Sep
    12

    New Undergraduate Fall 2025 Registration

    University Academic Calendar

    All Day

    EVENT DETAILS

    TIME Friday, September 12, 2025

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    CONTACT Office of the Registrar    nu-registrar@northwestern.edu EMAIL

    CALENDAR University Academic Calendar

  • Sep
    15

    Welcome & Luncheon for New Full-time Graduate Students

    McCormick School of Engineering and Applied Science

    11:00 AM Ryan Auditorium & Tech East Plaza, Technological Institute

    EVENT DETAILS

    TIME Monday, September 15, 2025 at 11:00 AM - 12:30 PM

    LOCATION Ryan Auditorium & Tech East Plaza, Technological Institute    map it

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    CONTACT Andi Joppie    andi.joppie@northwestern.edu EMAIL

    CALENDAR McCormick School of Engineering and Applied Science

  • Sep
    16

    Fall Classes Begin. Change of Registration (Drop/Add) Late registration for returning students begins

    University Academic Calendar

    All Day

    EVENT DETAILS

    TIME Tuesday, September 16, 2025

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    CONTACT Office of the Registrar    nu-registrar@northwestern.edu EMAIL

    CALENDAR University Academic Calendar