{"id":34262083,"url":"https://github.com/grinsfem/grins","last_synced_at":"2026-03-12T12:34:43.426Z","repository":{"id":9297965,"uuid":"11134999","full_name":"grinsfem/grins","owner":"grinsfem","description":"Multiphysics Finite Element package built on libMesh","archived":false,"fork":false,"pushed_at":"2024-04-07T14:30:56.000Z","size":372064,"stargazers_count":48,"open_issues_count":87,"forks_count":39,"subscribers_count":13,"default_branch":"master","last_synced_at":"2024-04-07T15:34:30.326Z","etag":null,"topics":["adjoints","amr","fem","hpc","libmesh","multiphysics","quantities-of-interest","sensitivity-analysis"],"latest_commit_sha":null,"homepage":"http://grinsfem.github.io","language":"C++","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"other","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/grinsfem.png","metadata":{"files":{"readme":"README.md","changelog":"CHANGES","contributing":null,"funding":null,"license":"COPYING","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null}},"created_at":"2013-07-02T20:54:25.000Z","updated_at":"2024-04-07T15:34:30.327Z","dependencies_parsed_at":"2023-01-11T20:11:54.107Z","dependency_job_id":null,"html_url":"https://github.com/grinsfem/grins","commit_stats":null,"previous_names":[],"tags_count":11,"template":false,"template_full_name":null,"purl":"pkg:github/grinsfem/grins","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/grinsfem%2Fgrins","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/grinsfem%2Fgrins/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/grinsfem%2Fgrins/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/grinsfem%2Fgrins/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/grinsfem","download_url":"https://codeload.github.com/grinsfem/grins/tar.gz/refs/heads/master","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/grinsfem%2Fgrins/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":286080680,"owners_count":27767508,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","status":"online","status_checked_at":"2025-12-16T02:00:10.477Z","response_time":57,"last_error":null,"robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":true,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["adjoints","amr","fem","hpc","libmesh","multiphysics","quantities-of-interest","sensitivity-analysis"],"created_at":"2025-12-16T16:00:33.897Z","updated_at":"2025-12-16T16:01:00.183Z","avatar_url":"https://github.com/grinsfem.png","language":"C++","funding_links":[],"categories":[],"sub_categories":[],"readme":"GRINS\n=======\n\nGeneral Reacting Incompressible Navier-Stokes (GRINS) was initiated\nto house common modeling work centered around using the incompressible\nand variable-density (low-Mach) Navier-Stokes equations\nutilizing the [libMesh](https://github.com/libMesh/libmesh.git) finite\nelement library, including both MPI and MPI+threads parallelism,\nas provided by [libMesh](https://github.com/libMesh/libmesh.git).\nGRINS has now become a tool for rapidly developing\nformulations and algorithms for the solution of complex multiphysics\napplications.\nGRINS originally lived within\nthe [PECOS](http://pecos.ices.utexas.edu) center at the Institute for Computational\nEngineering and Sciences ([ICES](https://www.ices.utexas.edu))\nat [The University of Texas at Austin](https://www.utexas.edu).\n\nWe encourage pull requests for new features, bug fixes, etc. For questions regarding development,\nwe have a [grins-devel](https://groups.google.com/forum/#!forum/grins-devel) Google group setup. For user related questions, please use the [grins-users](https://groups.google.com/forum/#!forum/grins-users)\ngroup.\n\nDependencies\n============\n\nRequirements\n------------\n\nIn addition to a C++17 compiler, GRINS requires an up-to-date installation of the [libMesh](https://github.com/libMesh/libmesh.git) finite element library.\n\nlibMesh\n-------\nGRINS development both drives and is driven by libMesh development. Thus, the required minimum master hash of libMesh may change in GRINS master.\nThe current required libMesh master hash is\nf27eba2\n[PR #3270](https://github.com/libMesh/libmesh/pull/3270), as of GRINS\n[PR #620](https://github.com/grinsfem/grins/pull/620).\nGRINS release 0.5.0 can use libMesh versions as old as 0.9.4. Subsequent to\nthe 0.5.0 release requires at least libMesh 1.0.0.\n\n\nOptional Packages\n-----------------\n\nTo enable the reacting low Mach Navier-Stokes physics class, GRINS must be compiled with\nan external chemistry library. Both [Cantera](http://code.google.com/p/cantera/) and\n[Antioch](https://github.com/libantioch/antioch) are fully supported.\n\nThe current required minimum hash for using Antioch is libantioch/antioch@e17822d (libantioch/antioch#265).\n\n\nBuilding GRINS\n================\n\nGRINS uses an Autotools build system, so typical GNU build commands are used. We support, and encourage, out-of-source builds (so-called VPATH builds). However, in-source builds are supported.\n\n1. cd grins-clone\n2. ./bootstrap (generate configure script)\n3. cd ../ \u0026 mkdir build \u0026 cd build\n4. ../grins-clone/configure --prefix=/path/to/install --with-libmesh=/path/to/libMesh (for more options, do ../grins-clone/configure --help)\n5. make (note parallel builds are supported)\n6. make check (note parallel-tests are supported)\n7. make install\n\nLD_LIBRARY_PATH\n---------------\n\nIf you've compiled libMesh with PETSc or other external libraries and have compiled GRINS with Antioch, Cantera, or other external libraries, you will need to add them to your LD_LIBRARY_PATH as we do not use -rpath when linking to the libraries.\n\nMETHOD\n------\n\nBy default, GRINS leverages the METHOD environment variable\n(described [here](https://github.com/libMesh/libmesh/blob/master/README.md)) in order to\nretrieve the CXXFLAGS variable from the [libMesh](https://github.com/libMesh/libmesh.git)\ninstallation (if METHOD is not present, the default is \"opt\"). Note that unlike libMesh,\nGRINS currently only supports building one METHOD at a time. Hence, we use `METHOD` and\nnot `METHODS`. For example\n\u003cpre\u003e\u003ccode\u003e\n./configure METHOD=devel\n\u003c/code\u003e\n\u003c/pre\u003e\nis valid.\n\nThe user can define\ntheir own CXXFLAGS variable by passing\n\u003cpre\u003e\u003ccode\u003e\n--disable-libmesh-flags CXXFLAGS=\"your flags here\"\n\u003c/code\u003e\n\u003c/pre\u003e\nto configure.\n\nExamples\n========\n\nUpon running `make install`, there are several examples in the `/path/to/install/examples` directory. Each example can be run with the local `run.sh` script. You may set the environment variable `GRINS_RUN` to run with more than one processor, e.g. `export GRINS_RUN=\"mpiexec -np 4\"`. Additionally, you can set the environment variable `GRINS_SOLVER_OPTIONS` to pass solver options, e.g. to use MUMPS through PETSc (if you built libMesh with PETSc and built PETSc with MUMPS), `export GRINS_SOLVER_OPTIONS=\"-ksp_type preonly -pc_type lu -pc_factor_mat_solver_package mumps\"`.\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fgrinsfem%2Fgrins","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fgrinsfem%2Fgrins","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fgrinsfem%2Fgrins/lists"}