Meeting Agenda

Date:	September 27, 2018
Location:	DC 1331
Time:	10:30
Chair:	Ryan Goldade

1. Acceptance of the Agenda - additions or deletions

2. Coffee Hour

Coffee hour last week:: Volunteers?
Coffee hour this week:: Volunteers?
Coffee hour next week:: Volunteers?

3. Forthcoming

Date:	October 4, 2018	October 11, 2018	October 18, 2018	October 25, 2018
Location:	DC 1331 10:30	DC 1331 10:30	DC 1331 10:30	DC 1331 1:30
Chair:	Craig Kaplan	Stephen Mann	Greg Philbrick	Reza Adhitya Saputra
Technical Presentation:	Michael Honke	Craig Kaplan	Stephen Mann	Greg Philbrick

4. Technical Presentation

Ryan Goldade	Title : Hybrid Grains: Adaptive Coupling of Discrete and Continuum Simulations of Granular Media Abstract: We propose a technique to simulate granular materials that exploits the dualstrengths of discrete and continuum treatments. Discrete element simulationsprovide unmatched levels of detail and generality, but prove excessivelycostly when applied to large scale systems. Continuum approaches are computationallytractable, but limited in applicability due to built-in modelingassumptions; e.g., models suitable for granular flows typically fail to captureclogging, bouncing and ballistic motion. In our hybrid approach, anoracle dynamically partitions the domain into continuum regions wheresafe, and discrete regions where necessary. The domains overlap alongtransition zones, where a Lagrangian dynamics mass-splitting coupling principleenforces agreement between the two simulation states. Enrichmentand homogenization operations allow the partitions to evolve over time.

Ryan Goldade

Title : Hybrid Grains: Adaptive Coupling of Discrete and Continuum Simulations of Granular Media
Abstract:
We propose a technique to simulate granular materials that exploits the dualstrengths of discrete and continuum treatments. Discrete element simulationsprovide unmatched levels of detail and generality, but prove excessivelycostly when applied to large scale systems. Continuum approaches are computationallytractable, but limited in applicability due to built-in modelingassumptions; e.g., models suitable for granular flows typically fail to captureclogging, bouncing and ballistic motion. In our hybrid approach, anoracle dynamically partitions the domain into continuum regions wheresafe, and discrete regions where necessary. The domains overlap alongtransition zones, where a Lagrangian dynamics mass-splitting coupling principleenforces agreement between the two simulation states. Enrichmentand homogenization operations allow the partitions to evolve over time.

5. Discussion Items

6. Action Items

7. Lab Events

8. Conferences and Special Journal Issues

9. Directors' Meeting

10. Seminars and Events

Thursday, 27 September 2018, 3:30PM - Combinatorics and Optimization (Graphs and Matroids Seminar), MC 5417
Ben Moore: -- A characterization of (p,q)-mixing when p/q 4

Friday, 28 September 2018, 3:30PM - Combinatorics and Optimization (Tutte Colloquium), MC 5501
Kevin Purbhoo: -- The Shapiro-Shapiro Conjecture

Also see other Math and CS postings.