.. DO NOT EDIT.
.. THIS FILE WAS AUTOMATICALLY GENERATED BY SPHINX-GALLERY.
.. TO MAKE CHANGES, EDIT THE SOURCE PYTHON FILE:
.. "auto_examples/unstructured/plot_tricontourf_unstructured.py"
.. LINE NUMBERS ARE GIVEN BELOW.

.. only:: html

    .. note::
        :class: sphx-glr-download-link-note

        :ref:`Go to the end <sphx_glr_download_auto_examples_unstructured_plot_tricontourf_unstructured.py>`
        to download the full example code.

.. rst-class:: sphx-glr-example-title

.. _sphx_glr_auto_examples_unstructured_plot_tricontourf_unstructured.py:


Contour from an unstructured mesh (no interpolation)
====================================================

This example reads and plots a contour of an OpenFoam vector field from an
unstructured mesh by triangulation WITHOUT interpolation on a structured grid

.. GENERATED FROM PYTHON SOURCE LINES 10-15

Reads the mesh
--------------

.. note:: It reads the mesh coordinates and stores them in variables x, y
          and z

.. GENERATED FROM PYTHON SOURCE LINES 15-23

.. code-block:: Python


    # import readmesh function from fluidfoam package
    from fluidfoam import readmesh

    sol = '../../output_samples/pipeline/'

    x, y, z = readmesh(sol)





.. rst-class:: sphx-glr-script-out

 .. code-block:: none

    Reading file ../../output_samples/pipeline//constant/polyMesh/owner
    Reading file ../../output_samples/pipeline//constant/polyMesh/faces
    Reading file ../../output_samples/pipeline//constant/polyMesh/points
    Reading file ../../output_samples/pipeline//constant/polyMesh/neighbour




.. GENERATED FROM PYTHON SOURCE LINES 24-29

Reads vector and scalar field
-----------------------------

.. note:: It reads volume scalar field from an unstructured mesh
          and stores it

.. GENERATED FROM PYTHON SOURCE LINES 29-38

.. code-block:: Python


    # import readvector and readscalar functions from fluidfoam package
    from fluidfoam import readvector, readscalar

    timename = '25'
    vel = readvector(sol, timename, 'Ub')
    alpha = readscalar(sol, timename, 'alpha')






.. rst-class:: sphx-glr-script-out

 .. code-block:: none

    Reading file ../../output_samples/pipeline/25/Ub
    Reading file ../../output_samples/pipeline/25/alpha




.. GENERATED FROM PYTHON SOURCE LINES 39-44

Plots the contour of the volscalarfield alpha and a patch
-----------------------------------------------------------------------------

.. note:: The scalar field alpha reprensents the concentration of sediment in
          in a 2D two-phase flow simulation of erosion below a pipeline

.. GENERATED FROM PYTHON SOURCE LINES 44-65

.. code-block:: Python

    import numpy as np
    import matplotlib.pyplot as plt

    # Define plot parameters
    fig, ax = plt.subplots(figsize=(8.5, 3), dpi=100)
    plt.rcParams.update({'font.size': 10})
    plt.xlabel('x/D')
    plt.ylabel('y/D')
    d = 0.05
    # Add a cuircular patch representing the pipeline
    circle = plt.Circle((0, 0), radius=0.5, fc='silver', zorder=10,
                        edgecolor='k')
    plt.gca().add_patch(circle)

    # Plots the contour of sediment concentration
    levels = np.arange(0.0, 0.63, 0.001)

    plt.tricontourf(x/d, y/d, alpha, cmap=plt.cm.Reds, levels=levels)

    ax.set(xlim=(-2, 7), ylim=(-1.5, 1.5))
    plt.show()



.. image-sg:: /auto_examples/unstructured/images/sphx_glr_plot_tricontourf_unstructured_001.png
   :alt: plot tricontourf unstructured
   :srcset: /auto_examples/unstructured/images/sphx_glr_plot_tricontourf_unstructured_001.png
   :class: sphx-glr-single-img






.. rst-class:: sphx-glr-timing

   **Total running time of the script:** (0 minutes 10.542 seconds)


.. _sphx_glr_download_auto_examples_unstructured_plot_tricontourf_unstructured.py:

.. only:: html

  .. container:: sphx-glr-footer sphx-glr-footer-example

    .. container:: sphx-glr-download sphx-glr-download-jupyter

      :download:`Download Jupyter notebook: plot_tricontourf_unstructured.ipynb <plot_tricontourf_unstructured.ipynb>`

    .. container:: sphx-glr-download sphx-glr-download-python

      :download:`Download Python source code: plot_tricontourf_unstructured.py <plot_tricontourf_unstructured.py>`

    .. container:: sphx-glr-download sphx-glr-download-zip

      :download:`Download zipped: plot_tricontourf_unstructured.zip <plot_tricontourf_unstructured.zip>`


.. only:: html

 .. rst-class:: sphx-glr-signature

    `Gallery generated by Sphinx-Gallery <https://sphinx-gallery.github.io>`_