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https://github.com/Exawind/nalu-wind

Solver for wind farm simulations targeting exascale computational platforms
https://github.com/Exawind/nalu-wind

cfd ecp exascale-computing exawind les low-mach wind-energy

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Solver for wind farm simulations targeting exascale computational platforms

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README 

        
# Nalu-Wind 



[Documentation](https://nalu-wind.readthedocs.io) | [Nightly test dashboard](http://my.cdash.org/index.php?project=Exawind) 



Nalu-Wind is a generalized, unstructured, massively parallel, incompressible

flow solver for wind turbine and wind farm simulations. The codebase is a

wind-focused fork of [NaluCFD](https://github.com/NaluCFD/Nalu); NaluCFD is developed 

and maintained by Sandia National Laboratories. Nalu-Wind is being actively

developed and maintained by a dedicated, multi-institutional team from [National

Renewable Energy Laboratory](https://nrel.gov), [Sandia National

Laboratories](https://sandia.gov), and [Univ. of Texas Austin](https://utexas.edu).



Nalu-Wind is developed as an open-source code with the following objectives: 



- an open, well-documented implementation of the state-of-the-art computational

  models for modeling wind farm flow physics at various fidelities that are

  backed by a comprehensive verification and validation (V&V) process;



- be capable of performing the highest-fidelity simulations of flowfields within

  wind farms; and 



- be able to leverage the high-performance leadership class computating

  facilities available at DOE national laboratories.



We hope that this community developed model will be used by research

laboratories, academia, and industry to develop the next-generation of wind farm

technologies. We welcome the wind energy community to use Nalu-Wind in their

research. When disseminating technical work that includes Nalu-Wind simulations

please reference the following citation:



    Sprague, M. A., Ananthan, S., Vijayakumar, G., Robinson, M., "ExaWind: A multifidelity 

    modeling and simulation environment for wind energy", NAWEA/WindTech 2019 Conference, 

    Amherst, MA, 2019.



## Documentation



Documentation is available online at https://nalu-wind.readthedocs.io/ and is

split into the following sections:



- [Theory manual](https://nalu-wind.readthedocs.io/en/latest/source/theory/index.html):

  This section provides a detailed overview of the supported equation sets, the

  discretization and time-integration schemes, turbulence models available, etc.

  

- [Verification manual](https://nalu-wind.readthedocs.io/en/latest/source/verification/index.html):

  This section documents the results from verification studies of the spatial

  and temporal schemes available in Nalu-Wind.

  

- [User manual](https://nalu-wind.readthedocs.io/en/latest/source/user/index.html):

  The user manual contains detailed instructions on building the code, along

  with the required third-party libraries (TPLs) and usage.

  

All documentation is maintained alongside the source code within the git

repository and automatically deployed to ReadTheDocs website upon new commits.

  

## Compilation and usage



Nalu-Wind is primarily built upon the packages provided by the [Trilinos

project](https://trilinos.org), which in turn depends on several third-party

libraries (MPI, HDF5, NetCDF, parallel NetCDF), and YAML-CPP. In addition, it

has the following optional dependencies: hypre, TIOGA, and OpenFAST. Detailed

build instructions are available in the [user

manual](https://nalu-wind.readthedocs.io/en/latest/source/user/building.html).

We recommend using [Spack](https://spack.io/) package manager to install

Nalu-Wind on your system.



### Testing and quality assurance



Nalu-Wind comes with a comprehensive unit test and regression test suite that

exercise almost all major components of the code. The `master` branch is

compiled and run through a regression test suite with different compilers

([GCC](https://gcc.gnu.org/), [LLVM/Clang](https://clang.llvm.org/), and

[Intel](https://software.intel.com/en-us/compilers)) on Linux and MacOS

operating systems, against both the `master` and `develop` branches of

[Trilinos](https://github.com/trilinos/Trilinos). Tests are performed both using

flat MPI and hybrid MPI-GPU hardware configurations. The results of the nightly

testing are publicly available on [CDash

dashboard](http://my.cdash.org/index.php?project=Nalu-Wind).



### Contributing, reporting bugs, and requesting help



To report issues or bugs please [create a new

issue](https://github.com/Exawind/nalu-wind/issues/new) on GitHub.



We welcome contributions from the community in form of bug fixes, feature

enhancements, documentation updates, etc. All contributions are processed

through pull-requests on GitHub. Please follow our [contributing

guidelines](https://github.com/Exawind/nalu-wind/blob/master/CONTRIBUTING.md)

when submitting pull-requests.

  

## License



Nalu-Wind is licensed under BSD 3-clause license. Please see the

[LICENSE](https://github.com/Exawind/nalu-wind/blob/master/LICENSE) included in

the source code repository for more details.



## Acknowledgements 



Nalu-Wind is currently being developed with funding from Department of Energy's

(DOE) Office of Science [Exascale Computing Project

(ECP)](https://www.exascaleproject.org/) and Energy Efficiency and Renewable

Energy (EERE) Wind Energy Technology Office (WETO). Please see [authors

file](https://github.com/Exawind/nalu-wind/blob/master/AUTHORS) for a 

list of contributors to Nalu-Wind.