The CTH analysis suite is an end-to-end toolset for setting up, solving, and interrogating shock physics problems. The main CTH analysis code is a multi-material, large deformation, strong shock wave hydrocode developed at Sandia National Laboratories. It has models for multi-phase, elastic, viscoplastic, porous, and explosive materials. Arbitrary tabular yield surfaces can be specified and modern state-of-the-art reactive flow models are included in the materials library. Three-dimensional rectangular meshes, two-dimensional rectangular and cylindrical meshes, as well as one-dimensional rectangular, cylindrical, and spherical meshes are available. CTH can utilize adaptive mesh refinement and second-order remap methods. It has been shown to scale efficiently to over 1.5 m cores in dedicated testing. The CTH suite provides on-the-fly visualization and post-processing through Spymaster which is also massively parallel. CTH runs under Linux, and MacOS, with Windows support through Windows Subsystem for Linux.
CTH 13.1 has now been released (February 2026)!
Check the Support tab under Release Information for more information.