2024.02.08 Meeting Notes

Agenda

• Individual/group updates
• Mesh refinement strategies
• review non-WIP PRs

Individual/group updates

LR

• looking into options for forrest of octree approach
• use case: more flexible coordinates for unstructured hexahedra mesh
• might be straightforwardly implemented using LogicalLocation basis

BP

• optimizing Kharma on Frontier (working with default stack)
• divergence free prolong operator close to ready for upstreaming

JD

• working on slides for upcoming joint project based on RIOT

PM

• PostInit PR got merged in (after some discussion around consistency across parameter interface for callback functions)
• New hook for initblock data (to put/extract struct for custom boundary conditions)

FG

• yt frontend ready for review from yt devs
• working on PPM in curvilinear coordinates in AthenaPK
  • question on cell center location (geometric center versus half-way point between faces) in Athena++ code
• WIP PR for coordinates didn't require any changes. Update PR to make it ready for final review.

PG

• gave OLCF talk
  • most feedback around IO
  • recording and slide available https://www.olcf.ornl.gov/calendar/userconcall-jan2024/
• PR open to allow cmd line and input file override for restarts
• GetAllBase()?
  • might already exists. JD will check.

Mesh refinement strategies

• Current block (2x2x2) split approach results in large number of cells (more than some sometimes necessary or compared to other AMR approaches)
• Alternatives include
  • other than factor of 2 refinement?
  • breaking proper nesting?
  • allow for different block sizes?
• In general, this topic is of interest as it came up independently at various downstream contexts -> good potential topic for dev meeting

Tentative next meeting 29 Feb