base on High-performance high-order finite element solver for hyperbolic conservation equations <img align="right" height="150" src="doc/logo.png"> ryujin ====== Ryujin is a high-performance high-order collocation-type finite-element solver for conservation equations such as the compressible Navier-Stokes and Euler equations of gas dynamics. The solver is based on the [convex limiting technique](https://doi.org/10.1137/17M1149961) to ensure [invariant domain preservation](https://doi.org/10.1137/16M1074291) and uses the finite element library [deal.II](https://github.com/dealii/dealii) ([website](https://www.dealii.org)) and the [vector class SIMD library](https://github.com/vectorclass/version2). As such the solver maintains important physical invariants and is guaranteed to be stable without the use of ad-hoc tuning parameters. Ryujin is freely available under the terms of the [Apache License 2.0](https://spdx.org/licenses/Apache-2.0.html) with [LLVM Exception](https://spdx.org/licenses/LLVM-exception.html). Part of the contributed source code, third-party dependencies and header libraries are covered by different open source licenses. For details consult [COPYING.md](COPYING.md). Contributions to the ryujin source code are governed by the [Developer Certificate of Origin version 1.1](https://developercertificate.org/); see [CONTRIBUTING.md](CONTRIBUTING.md) for details. Modules ------- Ryujin features the following equation modules selectable by the following parameter flags: - `equation = euler`, an optimized solver module for the [compressible Euler equations](https://en.wikipedia.org/wiki/Euler_equations_(fluid_dynamics)) with polytropic equation of state. - `equation = euler aeos`, a generalized solver module for the compressible Euler equation with an [arbitrary or tabulated equation of state](https://en.wikipedia.org/wiki/Equation_of_state). - `equation = navier stokes`, an optimized solver module for the [compressible Navier-Stokes equations](https://en.wikipedia.org/wiki/Navier%E2%80%93Stokes_equations) with polytropic equation of state, Newtonian fluid model, and Fourier's law for the heat flux. - `equation = shallow water`, a module for the [shallow water equations](https://en.wikipedia.org/wiki/Shallow_water_equations). - `equation = scalar conservation`, a module for scalar conservation equations with user-supplied flux. The module features a greedy wave-speed estimate to maintain an invariant domain, a generic indicator based on the entropy-viscosity commutator technique with a general, entropy-like function, and a customizable convex limiter. Resources --------- - [Website](https://conservation-laws.org/) - [Installation instructions](./INSTALLATION.md) - [Usage instructions](./USAGE.md) - [Doxygen documentation](https://conservation-laws.org/ryujin/doxygen) Videos ------ A number of simulation results can be found on [this youtube channel](https://www.youtube.com/@matthiasmaier8956). [<img src="https://img.youtube.com/vi/ig7R3yA7CtE/maxresdefault.jpg" width="400"/>](https://www.youtube.com/watch?v=ig7R3yA7CtE) [<img src="https://img.youtube.com/vi/yM2rT3teakE/maxresdefault.jpg" width="400"/>](https://www.youtube.com/watch?v=yM2rT3teakE) [<img src="https://img.youtube.com/vi/xIwJZlsXpZ4/0.jpg" width="400"/>](https://www.youtube.com/watch?v=xIwJZlsXpZ4) [<img src="https://img.youtube.com/vi/pPP26zelb0M/0.jpg" width="400"/>](https://www.youtube.com/watch?v=pPP26zelb0M) [<img src="https://img.youtube.com/vi/vBCRAF_c8m8/0.jpg" width="400"/>](https://www.youtube.com/watch?v=vBCRAF_c8m8) [<img src="https://img.youtube.com/vi/xecIZylotSE/0.jpg" width="400"/>](https://www.youtube.com/watch?v=xecIZylotSE) There original videos are available [here](https://tamiko.43-1.org/developer/) ([license details](https://tamiko.43-1.org/developer/COPYING.txt)). References ---------- If you use this software for an academic publication please consider citing the following references ([[1](https://arxiv.org/abs/2007.00094)], [[3](https://arxiv.org/abs/2106.02159})]): ``` @article {ryujin-2021-1, author = {Matthias Maier and Martin Kronbichler}, title = {Efficient parallel 3D computation of the compressible Euler equations with an invariant-domain preserving second-order finite-element scheme}, doi = {10.1145/3470637}, url = {https://arxiv.org/abs/2007.00094}, journal = {ACM Transactions on Parallel Computing}, year = {2021}, volume = {8}, number = {3}, pages = {16:1-30}, } @article{ryujin-2021-3, author = {Jean-Luc Guermond and Martin Kronbichler and Matthias Maier and Bojan Popov and Ignacio Tomas}, title = {On the implementation of a robust and efficient finite element-based parallel solver for the compressible Navier-stokes equations}, doi = {10.1016/j.cma.2021.114250}, url = {https://arxiv.org/abs/2106.02159}, journal = {Computer Methods in Applied Mechanics and Engineering}, year = {2022}, volume = {389}, pages = {114250}, } ``` Contact ------- For questions either open an [issue](https://github.com/conservation-laws/ryujin/issues), or contact Matthias Maier ([email protected]). Developers ---------- - Martin Kronbichler ([@kronbichler](https://github.com/kronbichler)), Ruhr University Bochum, Germany - Matthias Maier ([@tamiko](https://github.com/tamiko)), Texas A&M University, TX, USA - Ignacio Tomas ([@nachosaurus](https://github.com/nachosaurus)), Texas Tech University, TX, USA - Eric Tovar ([@ejtovar](https://github.com/ejtovar)), Los Alamos National Laboratory, USA Contributors ------------ - Wolfgang Bangerth [@bangerth](https://github.com/bangerth), Colorado State University - Taylor Boylan ([@tmboylan](https://github.com/tmboylan)), - Jerett Cherry ([@jerret-cc](https://github.com/jerett-cc)), Colorado State University - Gregory Christian ([@gregorychristian](https://github.com/gregorychristian)) - Bennett Clayton ([@bgclayto](https://github.com/bgclayto)) - Seth Gerberding ([@Gerbeset](https://github.com/Gerbeset)), Texas A&M University, TX, USA - Jake Harmon ([@harmonj](https://github.com/harmonj)), Los Alamos National Laboratory, USA - Jordan Hoffart ([@jordanhoffart](https://github.com/jordanhoffart)), Texas A&M University, TX, USA - David Pecoraro ([@ChrisPec27](https://github.com/ChrisPec27)), Texas A&M University, TX, USA - Madison Sheridan ([@Helblindi](https://github.com/Helblindi)), Texas A&M University, TX, USA - Gregory Christian ([@gregorychristian](https://github.com/gregorychristian), Imperial College London, UK ", Assign "at most 3 tags" to the expected json: {"id":"13701","tags":[]} "only from the tags list I provide: [{"id":77,"name":"3d"},{"id":89,"name":"agent"},{"id":17,"name":"ai"},{"id":54,"name":"algorithm"},{"id":24,"name":"api"},{"id":44,"name":"authentication"},{"id":3,"name":"aws"},{"id":27,"name":"backend"},{"id":60,"name":"benchmark"},{"id":72,"name":"best-practices"},{"id":39,"name":"bitcoin"},{"id":37,"name":"blockchain"},{"id":1,"name":"blog"},{"id":45,"name":"bundler"},{"id":58,"name":"cache"},{"id":21,"name":"chat"},{"id":49,"name":"cicd"},{"id":4,"name":"cli"},{"id":64,"name":"cloud-native"},{"id":48,"name":"cms"},{"id":61,"name":"compiler"},{"id":68,"name":"containerization"},{"id":92,"name":"crm"},{"id":34,"name":"data"},{"id":47,"name":"database"},{"id":8,"name":"declarative-gui "},{"id":9,"name":"deploy-tool"},{"id":53,"name":"desktop-app"},{"id":6,"name":"dev-exp-lib"},{"id":59,"name":"dev-tool"},{"id":13,"name":"ecommerce"},{"id":26,"name":"editor"},{"id":66,"name":"emulator"},{"id":62,"name":"filesystem"},{"id":80,"name":"finance"},{"id":15,"name":"firmware"},{"id":73,"name":"for-fun"},{"id":2,"name":"framework"},{"id":11,"name":"frontend"},{"id":22,"name":"game"},{"id":81,"name":"game-engine "},{"id":23,"name":"graphql"},{"id":84,"name":"gui"},{"id":91,"name":"http"},{"id":5,"name":"http-client"},{"id":51,"name":"iac"},{"id":30,"name":"ide"},{"id":78,"name":"iot"},{"id":40,"name":"json"},{"id":83,"name":"julian"},{"id":38,"name":"k8s"},{"id":31,"name":"language"},{"id":10,"name":"learning-resource"},{"id":33,"name":"lib"},{"id":41,"name":"linter"},{"id":28,"name":"lms"},{"id":16,"name":"logging"},{"id":76,"name":"low-code"},{"id":90,"name":"message-queue"},{"id":42,"name":"mobile-app"},{"id":18,"name":"monitoring"},{"id":36,"name":"networking"},{"id":7,"name":"node-version"},{"id":55,"name":"nosql"},{"id":57,"name":"observability"},{"id":46,"name":"orm"},{"id":52,"name":"os"},{"id":14,"name":"parser"},{"id":74,"name":"react"},{"id":82,"name":"real-time"},{"id":56,"name":"robot"},{"id":65,"name":"runtime"},{"id":32,"name":"sdk"},{"id":71,"name":"search"},{"id":63,"name":"secrets"},{"id":25,"name":"security"},{"id":85,"name":"server"},{"id":86,"name":"serverless"},{"id":70,"name":"storage"},{"id":75,"name":"system-design"},{"id":79,"name":"terminal"},{"id":29,"name":"testing"},{"id":12,"name":"ui"},{"id":50,"name":"ux"},{"id":88,"name":"video"},{"id":20,"name":"web-app"},{"id":35,"name":"web-server"},{"id":43,"name":"webassembly"},{"id":69,"name":"workflow"},{"id":87,"name":"yaml"}]" returns me the "expected json"