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Baikal
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new thorn that solves Einstein's equations, using the BSSN 3+1 formalism, in Cartesian coordinates.
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extensively documented in pedagogical Jupyter notebooks
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borrows extensively from lean_public
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makes extensive use of the Python and SymPy-based NRPy+ code generation infrastructure available on GitHub, which aims to provide a completely free, open-source means for converting expressions in Einstein-like tensorial notation into highly optimized C-code kernels.
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implements most common (highly robust) options for numerical relativity GRHD and GRMHD simulations
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moving-puncture gauge conditions (1+log lapse and Gamma-driving shift condition) enabled by default.
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options of 2nd or 4th order finite-difference kernels, Kreiss-Oliger dissipation enabled by default via tunable parameter
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validated to agree with ML_BSSN in case of BNS evolutions
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BaikalVacuum
- version of Baikal optimized for vacuum (e.g., black hole and binary black hole) spacetimes
