{
"cells": [
{
"cell_type": "markdown",
"id": "ca780d9a",
"metadata": {},
"source": [
"# Importing Snapshots from OpenFOAM\n",
"\n",
"**Aim of this notebook:** learn how to import transient snapshots from OpenFOAM (version 2012 from com-version) using *pyvista* package.\n",
"\n",
"The snapshots are related to the laminar Flow Over Cylinder in fluid dynamics, governed by the Navier-Stokes equations. In particular, the snapshots have been generated using the tutorial case reported [here](https://develop.openfoam.com/Development/openfoam/-/tree/OpenFOAM-v2012/tutorials/incompressible/pimpleFoam/laminar/cylinder2D).\n",
"Furthermore, some features of the *pyvista* package are shown, including plotting and data manipulation.\n",
"\n",
"The data are available on Zenodo, change the folder name to `OF_case` or change the path in the code below.\n",
"\n",
"The class `ReadFromOF` is used to read the OpenFOAM snapshots, create a mesh for *dolfinx* and plot the results using *pyvista*."
]
},
{
"cell_type": "code",
"execution_count": 1,
"id": "105ce645",
"metadata": {},
"outputs": [
{
"name": "stderr",
"output_type": "stream",
"text": [
"/Users/sriva/miniconda3/envs/ml/lib/python3.10/site-packages/ufl/__init__.py:244: UserWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html. The pkg_resources package is slated for removal as early as 2025-11-30. Refrain from using this package or pin to Setuptools<81.\n",
" import pkg_resources\n"
]
}
],
"source": [
"from pyforce.tools.write_read import ReadFromOF\n",
"\n",
"of = ReadFromOF('OF_case/')"
]
},
{
"cell_type": "markdown",
"id": "993beced",
"metadata": {},
"source": [
"The case contains an `UnstructuredGrid` element containing the fields `U`, `p`. The default time step is `0`, but you can change it to any other time step available in the case."
]
},
{
"cell_type": "code",
"execution_count": 2,
"id": "252a4a26",
"metadata": {},
"outputs": [
{
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