- Day Two Agenda
- Breakfast Sausage Biscuit and Water from 7-11 on Light Street

- A complimentary wireless “hotspot” is provided by the University of Maryland epartment of Mechanical Engineering and the Burgers Program for Fluid Dynamics.

*I attended the following APS sessions. *

**G21.00001:**Evolving geometry of a vortex triangle Vikas Krishnamurthy , Hassan Aref**G21.00002:**Bilinear relative equilibria of identical point vortices Hassan Aref , Peter Beelen , Morten Br{\O}ns**G21.00004:**New Results on Hollow Vortices Stefan Llewellyn Smith , Darren Crowdy**G21.00005:**Analysis of Reynolds number scaling for viscous vortex reconnection Qionglin Ni , Fazle Hussain , Jianchun Wang , Shiyi Chen**G21.00006:**Streamline Topology of Helical Fluid Flow Morten Andersen**G21.00007:**The constrained dipole dynamical system Andrew Tchieu , Eva Kanso , Paul Newton**G21.00008:**Coupling of a 3-D vortex particle-mesh method with a finite volume near-wall solver Y. Marichal , T. Lonfils , M. Duponcheel , P. Chatelain , G. Winckelmans**G21.00009:**Resonant instability in two-dimensional vortex arrays Paolo Luzzatto-Fegiz , Charles H.K. Williamson**G21.00010:**3D Characterization of Transmitral Vortex using Defocusing Digital Particle Image Velocimetry Ahmad Falahatpisheh , Brandon Dueitt , Niema Pahlevan , Arash Kheradvar

**Take-aways from session attendance:**

**G21.00001**: Explored a new description of three-vortex motion in terms of the angles, *A;B;C*, in the triangle of vortices, the radius, *R*, of the circumcircle to this triangle, and the position of the circumcenter. We show that the equations of motion for the radius and angles may be expressed in terms of these variables alone, i.e., the evolution of *R; A;B;C *leads to an autonomous four-dimensional dynamical system.

**G21.00002:** They also explores a new class of bilinear relative equi-libria of identical point vortices in which the vortices are constrained to be on two perpendicular lines, taken to be the *x*– and *y*-axes of a carte- sian coordinate system, is introduced and studied.

** G21.00004:** Hollow vor-tices are vortices whose interior is at rest. We obtain exact solutions for hollow vortices in linear and nonlinear strain. We then investigate the stability properties of these vortices and for the hollow vortex street of Baker, Sa®man and She±eld.

**Poster Session LA**

**Poster Session LA**

**Fluids Education Lunch Workshop at the Hyatt Regency at the Inner Harbor — Constellation F**

The workshop provided an opportunity for fluids educators to discuss topics of mutual interest, such as curricula comparisons, best practices, simple experiments and demos, use of concept questions, and more. Thematic “Table Questions” were provided to guide conversation, and we will harvest “Best of the Table” highlights at the end of the lunch.

**Invited Lecture**

**Geophysical Fluid Dynamics Reception ~ Hyatt Regency at the Inner Harbor**

Harborview promotion of the GFD program at Woods Hole Oceanographic Institution was provided. Awesome networking with among Scientists!

**Geophysical Fluid Dynamics Reception ~ Hyatt Regency at the Inner Harbor**- Rest and reflection ended the day.