SNAC

Updated Lagrangian explicit finite difference code for modeling a finitely deforming elasto-visco-plastic solid in 3D.

In SNAC, nodal velocities satisfying a weak-form of the momentum balance are obtained as the nodal solution. SNAC shares a mathematical foundation, and thus major advantages, with a standard finite element method (FEM). However, it departs from the FEM by not making explicit use of shape functions.

In version 1.2, the base algorithm for remeshing has been changed and, as a result, remeshing in SNAC has become more stable. Now SNAC can run for an extended period of time. On the users' end, there is no visible change; input files for the previous version can be used without modification.

Current Release

User Resources

User Manual

The SNAC user manual is available online.

Community Wiki

Visit the SNAC Wiki page for additional support with building, using, or modifying SNAC.

SNAC Publications List

Research publications using SNAC.

Community Discussion

Browse the CIG Mailing List Archive to find past discussions and previous troubleshooting help, or post to the CIG forum with questions or comments.

Developer Resources

Development Version

If you are interested in getting the development version of this code from the CIG repository, use the following git command:

git clone --recursive https://github.com/geodynamics/snac.git

You can also browse the history of modifications in the Git repository.

Issue/Bug Tracker on Github

Browse and/or submit new issues at our Github Issues Tracker.

Doxygen Documentation

Auto-generated Doxygen documentation is available for the Development and Release codebases.

SNAC Users Map

Shows location of all users who downloaded SNAC in the past year (image updated daily.)