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PyLith v1.9.0

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@baagaard baagaard released this 05 May 20:31
· 5578 commits to main since this release
v1.9.0
4acdf41

This release fixes several bugs in PyLith v1.8.0. We strongly recommend all users of previous PyLith releases switch to this latest release.

No changes are needed in .cfg files to switch from v1.8.0 to v1.9.0. Version 1.9.0 does includes some changes to the friction and material model interfaces, so extensions do require changes. See the templates for details.

The binaries below are suitable for use on single core/processor computers as well as multi-core or multi-processor computers. They can only be used on a single compute node of a cluster. Detailed installation instructions for the binary packages are in the User Manual. Users wanting to run PyLith on multiple compute nodes of a cluster must build from source. Use the PyLith Installer to install from source. Detailed building instructions for a few platforms in the INSTALL file bundled with the PyLith Installer.

RELEASE NOTES - PyLith v1.9.0

  • New features

    • Added Newton-Raphson algorithm for spontaneous rupture simulations with explicit-stepping.

      Enforcing the friction criterion in a spontaneous rupture simulation with explicit time-stepping now uses a Newton-Raphson algorithm to find the correct traction increment. This provides a more stable numerical solution and eliminates oscillatory behavior when using rate-state friction.

      Added SCEC spontaneous rupture benchmark TPV102 to the benchmark repository. PyLith produces results very similar to several other finite-element codes.

  • Bug fixes
    • Fixed two MPI related bugs in computing Green's functions in parallel. The number of impulses corresponded to only those on process 0 and the output of the impulses for vertices on processor boundaries was inconsistent.
    • Corrected computation of fault tractions (Lagrange multipliers) on process boundaries for prescribed slip with explicit time stepping.
    • Fixed bug when reading in list of output points with just one point.
    • Adjusted autoconf Python setup macro to remove temporary sysconfig.pyc file.
    • Added check to make sure degree of freedom specified in Dirichlet BC is consistent with spatial dimension of problem.
    • Corrected two typos in the manual related to fault opening and tractions in examples/3d/hex8/step20 and updating to the use of cell.dimension for the quadrature scheme with tetrahedral cells.
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