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https://quokka-astro.github.io/quokka/

Two-moment AMR radiation hydrodynamics (with self-gravity, particles, and chemistry) on CPUs/GPUs for astrophysics
https://quokka-astro.github.io/quokka/

adaptive-mesh-refinement astrochemistry astrophysics cuda gpu hip hydrodynamics particles rocm self-gravity

Last synced: 8 months ago
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Two-moment AMR radiation hydrodynamics (with self-gravity, particles, and chemistry) on CPUs/GPUs for astrophysics

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# QUOKKA

*Quadrilateral, Umbra-producing, Orthogonal, Kangaroo-conserving Kode for Astrophysics!*



**The Quokka methods paper is now available: https://arxiv.org/abs/2110.01792**



**For detailed instructions on installing the code, please refer to the [Quokka Documentation](https://quokka-astro.github.io/quokka/index.html). You can start a [Discussion](https://github.com/BenWibking/quokka/discussions) for technical support, or open an [Issue](https://github.com/BenWibking/quokka/issues) for any bug reports.**



Quokka is a two-moment radiation hydrodynamics code that uses the piecewise-parabolic method, with AMR and subcycling in time. Runs on CPUs (MPI+vectorized) or NVIDIA GPUs (MPI+CUDA) with a single-source codebase. Written in C++17. (100% Fortran-free.)



Here is a [a Kelvin-Helmholz instability simulated with Quokka](https://vimeo.com/714653592) on a 512x512 uniform grid:



![Animated GIF of KH Instability](https://videoapi-muybridge.vimeocdn.com/animated-thumbnails/image/1f468be6-6d7b-4d53-a02c-4dd8f3ad5154.gif?ClientID=vimeo-core-prod&Date=1653705774&Signature=9bea89d5c9657180391a9538a10fd4f8f7099025)



This is [a 3D Rayleigh-Taylor instability](https://vimeo.com/746363534) simulated on a $256^3$ grid:



![Image of 3D RT instability](extern/rt3d_visit.png)



Quokka also features advanced Adaptive Quokka Refinement:tm: technology:



![Image of Quokka with Baby in Pouch](extern/quokka2.png)



## Dependencies

* C++ compiler (with C++17 support)

* CMake 3.16+

* Python 3.8+

* MPI library with GPU-aware support (OpenMPI, MPICH, or Cray MPI)

* HDF5 1.10+ (serial version)

* CUDA 11.7+ (optional, for NVIDIA GPUs)

* ROCm 6.3+ (optional, for AMD GPUs)

* ADIOS2 2.9+ with GPU-aware support (optional, for writing terabyte-sized or larger outputs)



## Problems?

If you run into problems, please start a [Discussion](https://github.com/BenWibking/quokka/discussions) for technical support. If you discover a bug, please let us know by opening an [Issue](https://github.com/BenWibking/quokka/issues).