Meeting Agenda

Date:	February 27, 2019
Location:	DC 1331
Time:	11:00
Chair:	Greg Philbrick

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:	March 6, 2019	March 13, 2019	March 20, 2019
Location:	DC 1331 11:00	DC 1331 11:00	DC 1331 11:00	DC 1331 11:00
Chair:	Reza Saputra	Andrew Tinits	Christopher Batty
Technical Presentation:	Greg Philbrick	Reza Saputra	Andrew Tinits

4. Technical Presentation

Jonathan Panuelos	Title : Central Schemes for Moving Particle-based Hydrodynamics Abstract: Central schemes are a class of Godunov-like numerical methods that replace expensive Riemann solvers with a cheaper but more diffusive flux calculations. The Kurganov-Tadmor (KT) scheme is one such central scheme that attempts to limit its diffusivity, performing admirably at the supersonic regime yet is found to cause excessive diffusion for shearing problems. Diffusion is required to maintain stability and prevent formation of spurious structures, but too much suppresses even physically relevant structures. A new method for controlling the diffusion in the KT scheme is proposed, based on determining whether the local flow is shearing or not.

Jonathan Panuelos

Title : Central Schemes for Moving Particle-based Hydrodynamics
Abstract:
Central schemes are a class of Godunov-like numerical methods that replace expensive Riemann solvers with a cheaper but more diffusive flux calculations. The Kurganov-Tadmor (KT) scheme is one such central scheme that attempts to limit its diffusivity, performing admirably at the supersonic regime yet is found to cause excessive diffusion for shearing problems. Diffusion is required to maintain stability and prevent formation of spurious structures, but too much suppresses even physically relevant structures. A new method for controlling the diffusion in the KT scheme is proposed, based on determining whether the local flow is shearing or not.

5. Discussion Items

6. Lab Events

Construction has started in the lab. There will be some money for adding sound proofing and lab renovations later in the year. The plan to move the door on the vision lab has been put aside for now; let the directors know if the vision people coming and going is a problem.
SIGGRAPH 2019, Los Angeles, July 27-August 1, 2019