Turbulucid is a package for post-processing two-dimensional cell-centered VTK polyData. The main use case is envisioned to be analysis of cut-plane data coming from finite-volume based solvers for Computational Fluid Dynamics. The package contains functions for both plotting the data and data introspection.
For more details see this paper https://openresearchsoftware.metajnl.com/article/10.5334/jors.213/ Please cite it if you use Turbulucid in your work!
VTK has become a popular format for storing unstructured datasets (both 3d and 2d). The API of VTK and software such as Paraview already provide the means for working with VTK data, so why the need for a new package? The answer is that while the above-mentioned tools are excellent for general inspection of large 3d datasets, they do not provide the means for producing publication-quality plots of 2d data. An example of such a plot, produced with turbulucid, is shown below.
Also, while VTK provides an abundance of filters for extracting specific parts of a dataset, the object-oriented API is hard to learn and quite verbose. Turbulucid provides easier access to the data and a set of functions for performing simple extractions.
Under the hood turbulucid uses VTK to handle the data, but exposes everything to the user in terms of numpy arrays. The plotting functions use matplotlib, and return associated matplotlib objects. This allows the user to harness the full customization power of matplotlib to make the plots look exactly as desired.
Turbulucid requires Python 3. It should work on any platform, where the packages described below also work. It has been used extensively on both Windows and Linux.
For turbulucid to work, several other packages have to installed.
Four packages are numpy, scipy, matplotlib, and pytest.
These are easy to obtain and are part of many python distributions, in
particular, Anaconda.
Turbulucid also depends on python bindings for VTK, i.e the vtk package.
The version of VTK should be at least 7.0.0.
With Anaconda, VTK can be obtained by running
conda install vtk in the terminal.
However, recently there have been some issues with VTK and conda, which seem to be resolved by using the conda-forge package channel: conda install vtk -c conda-forge.
The best practice is to then use a separate conda environment and install all the necessary pacakges from conda-forge there.
Installing the package is easy.
Simply clone the git repository or download it as an archive and then unpack.
Then navigate to the root catalog of the code in a terminal and execute
python setup.py install.
This may require root priviliges, if you lack them, the --user flag can be used.
Alternatively, the --prefix flag can be used to directly specify the installation path.
Using conda, it is possible to test the package in a separate environment:
conda create -n tbl python=3.8 source activate tbl conda install -c conda-forge vtk numpy scipy matplotlib pytest python setup.py install
For more info regarding Anaconda environments refer to https://conda.io/docs/user-guide/tasks/manage-environments.html
Turbulucid comes with a number of unit tests, covering part of its functionality.
Expanding the test suite is a work in progress.
The tests are ran on Travis after each commit.
To run the tests on your machine, go to the top-level directory of turbulucid and run pytest tests.
The best way to validate the functionality is to apply turbulucid to post-processing some simple dataset, which can also be opened in another software in order to compare results. To that end, three datasets are provided in the turbulucid/datasets folder. All are stored as .vtm VTK files that can also be opened in e.g. Paraview.
A great place to learn how to use the package is the tutorial availble in docs/tutorial. You can view the tutorial directly in the browser. To run it on your machine, you need to install Jupyter, please refer to https://jupyter.org for associated documentation.
A compilation of all the docstrings is availble at the project's Github pages.
A collection of video-tutorials are gathered in this Youtube playlist
Turbulucid is free software and is provided under the GNU GPL Version 3. See LICENSE.txt for the full text of the license.
The copyright to the code and documentation belongs to the author, Timofey Mukha.
Please take special notice of the following disclaimers.
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