The Enzo-P/Cello Project

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The Enzo-P/Cello Project

Cello is a highly scalable, fully-distributed array-of-octree parallel adaptive mesh refinement (AMR) framework, and Enzo-P is an Eulerian hydrodynamics and MHD astrophysics application that is built using Cello. Enzo-P is a branch of the Enzo parallel astrophysics and cosmology application. Enzo-P / Cello is currently funded by the National Science Foundation (NSF) grant SI2-SSE-1440709, with previous funding through NSF grants PHY-1104819 and AST-0808184.

Two fundamental differences between Enzo-P and Enzo are their AMR design and parallelization. Cello implements array of octree AMR, which has demonstrated scalability to date through 256K floating-point cores of the NSF Blue Waters supercomputer at the National Center for Supercomputing Applications. Unlike Enzo, which is parallelized using MPI, Enzo-P/Cello is parallelized using Charm++, an externally-developed OOP parallel programming system targeting the implementation of Exascale applications.

Enzo-P currently has two hyperbolic solvers: PPM, an enhanced piecewise parabolic method solver that was migrated to Enzo-P from the Enzo code base, and PPML, an ideal compressible MHD solver originally implemented in serial Fortran. More recently, physics and infrastructure capabilities have been developed for particle methods, including an implementation of Enzo's CIC particle-mesh gravity solver. Currently we are collaborating with Prof. Daniel Reynolds on developing and implementing a highly scalable multigrid-based linear solver.

James Bordner (jobordner@ucsd.edu)