The FLASH code is a modular, adaptive, parallel simulation code capable of handling general compressible flow problems in astrophysical environments. FLASH is written in Fortran 90 and C, and is freely available. FLASH is distributed as source code, and has runs on most UNIX platforms. More information can be found at http://flash.uchicago.edu.

All users of previous versions are encouraged to upgrade. The download is available at:
https://flash.uchicago.edu/code_download/ (note the 's' in https). You will need your username and password from previous downloads.

New users can request the code at:
http://flash.uchicago.edu/public/handlePublic.py?submit=codeRequest

The major changes are summarized below:

• Expanded documentation
• Better support for Intel, Compaq, Sun, and Lahey compilers
• Enhancements to the setup script (-nxb, -with-module, -stack)
• HDF5 output is now the default
• runtime parameters are now stored in HDF5 files
• minima and maxima attributes accompany the variable records
• serial I/O performance improved
• ability to restart from a checkpoint file directly
• New conversion tools for TecPlot and ChomboVis
• Piecewise-Parabolic Method (PPM) improvements
  • hybrid Riemann solver
  • further implementation of the CMA algorithm
• Entropy now returned by all EOSs
• New model burners (kpp and arrhenius)
• Gravity changes
• optimizations to the multipole gravity solver
• multigrid can use multipole coarse solve
• Geometry enhancements
• new prolongation routines for 1-d spherical and 2-d cylindrical geometries
• flux correction fixes in 1-d spherical coordinates
• generalized restriction routine
• improved support for non-Cartesian geometries in the diffusion routines
• Initial support for cosmology
• Integration of IBM HPM and PAPI performance monitor libraries
• Runtime visualization

The FLASH Code group
http://flash.uchicago.edu/