News & Events
Department Events

Events

  • Jan
    14

    Continuum Modeling of Flow and Size-Segregation in Dense Granular Materials

    McCormick - Civil and Environmental Engineering

    10:00 AM

    EVENT DETAILSmore info

    TAM SEMINAR PRESENTS:
    David L. Henann
    James R. Rice Associate Professor of Solid Mechanics
    Brown University

    Abstract
    Dense granular systems that consist of particles of disparate size segregate based on size during flow, resulting in complex, coupled segregation and flow fields. In this talk, we study size-segregation phenomenology using discrete-element method (DEM) simulations of dense, bidisperse particles and propose a continuum model for coupled size-segregation and flow in dense, bidisperse granular systems. In our DEM simulations, we consider four flow geometries: (1) gravity-driven flow down a long vertical chute, (2) annular shear flow, (3) gravity-driven flow down a rough, inclined surface, and (4) planar shear flow in the presence of gravity - all while varying system parameters, such as the flow rate, system size, fraction of large/small grains, and grain-size ratio. Selected DEM simulation data inform continuum constitutive equations for the relative flux of large and small particles. The segregation model accounts for two driving forces - shear-strain-rate-gradients and pressure-gradients. When coupled with the nonlocal granular fluidity model - a nonlocal continuum model for dense granular flow - we show that both flow fields and segregation dynamics may be simultaneously captured using the coupled, continuum model.

    Biography
    David L. Henann is the James R. Rice Associate Professor of Solid Mechanics at Brown University. He received his B.S. in Mechanical Engineering from Binghamton University in 2006, followed by his S.M. and Ph.D. in Mechanical Engineering from MIT in 2008 and 2011, respectively. After postdoctoral appointments at MIT and Harvard, he joined the faculty at Brown University in the fall of 2013. His research focuses on the formulation of new continuum-level constitutive theories for describing material behavior and the quantitative modeling of material behavior through numerical simulation. Henann is the recipient of an NSF CAREER Award and the 2016 Pi Tau Sigma Gold Medal from the American Society of Mechanical Engineers (ASME).

    more less

    TIME Thursday, January 14, 2021 at 10:00 AM - 11:00 AM

    ADD TO CALENDAR SHARE

    CONTACT Alison Rodriguez    alison.rodriguez@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Mar
    3

    SPREE Seminar: Joe Labuz

    McCormick - Civil and Environmental Engineering

    11:00 AM

    EVENT DETAILS

    TIME Wednesday, March 3, 2021 at 11:00 AM - 12:00 PM

    ADD TO CALENDAR SHARE

    CONTACT Tierney Acott    tierney.acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Mar
    4

    TAM Seminar: Prof. Wendy C. Crone

    McCormick - Civil and Environmental Engineering

    10:00 AM

    EVENT DETAILSmore info

    TIME Thursday, March 4, 2021 at 10:00 AM - 11:00 AM

    ADD TO CALENDAR SHARE

    CONTACT Alison Rodriguez    alison.rodriguez@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Mar
    5

    EES Seminar: Kevin Wilkinson

    McCormick - Civil and Environmental Engineering

    2:00 PM

    EVENT DETAILS

    TIME Friday, March 5, 2021 at 2:00 PM - 3:00 PM

    ADD TO CALENDAR SHARE

    CONTACT Tierney Acott    tierney.acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Mar
    10

    SPREE Seminar: John van de Lindt

    McCormick - Civil and Environmental Engineering

    11:00 AM

    EVENT DETAILS

    TIME Wednesday, March 10, 2021 at 11:00 AM - 12:00 PM

    ADD TO CALENDAR SHARE

    CONTACT Tierney Acott    tierney.acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Mar
    11

    Electronically Integrated Microscopic Robots

    McCormick - Civil and Environmental Engineering

    10:00 AM

    EVENT DETAILSmore info

    TIME Thursday, March 11, 2021 at 10:00 AM - 11:00 AM

    ADD TO CALENDAR SHARE

    CONTACT Alison Rodriguez    alison.rodriguez@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Mar
    12

    EES Seminar: Noah Fierer

    McCormick - Civil and Environmental Engineering

    2:00 PM

    EVENT DETAILS

    TIME Friday, March 12, 2021 at 2:00 PM - 3:00 PM

    ADD TO CALENDAR SHARE

    CONTACT Tierney Acott    tierney.acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Mar
    13

    Winter Classes End

    University Academic Calendar

    All Day

    EVENT DETAILS

    TIME Saturday, March 13, 2021

    ADD TO CALENDAR SHARE

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

    CALENDAR University Academic Calendar

  • Mar
    15

    Winter Examinations Begin

    University Academic Calendar

    All Day

    EVENT DETAILS

    TIME Monday, March 15, 2021

    ADD TO CALENDAR SHARE

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

    CALENDAR University Academic Calendar

  • Mar
    20

    Spring Break Begins

    University Academic Calendar

    All Day

    EVENT DETAILS

    TIME Saturday, March 20, 2021

    ADD TO CALENDAR SHARE

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

    CALENDAR University Academic Calendar

  • Mar
    26

    Winter Degrees Conferred

    University Academic Calendar

    All Day

    EVENT DETAILS

    TIME Friday, March 26, 2021

    ADD TO CALENDAR SHARE

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

    CALENDAR University Academic Calendar

  • Mar
    29

    Spring Break Ends

    University Academic Calendar

    All Day

    EVENT DETAILS

    TIME Monday, March 29, 2021

    ADD TO CALENDAR SHARE

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

    CALENDAR University Academic Calendar

  • Mar
    30

    Spring Classes Begin 8 a.m. Classes remote until Tuesday, April 6.

    University Academic Calendar

    All Day

    EVENT DETAILS

    TIME Tuesday, March 30, 2021

    ADD TO CALENDAR SHARE

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

    CALENDAR University Academic Calendar