PyFluent

Overview

PyFluent provides Pythonic access to Ansys Fluent. Its features enable the seamless use of Fluent within the Python ecosystem and broad access to native Fluent features, including the ability to:

• Launch Fluent using a local Ansys installation
• Use Fluent's TUI (text user interface) commands for both meshing and solver features
• Use Fluent's built-in postprocessing capabilities

Documentation and issues

For comprehensive information on PyFluent, see the latest release documentation.

On the PyFluent Issues page, you can create issues to submit questions, report bugs, and request new features. To reach the project support team, email [email protected].

Installation

The ansys-fluent-core package supports Python 3.8 through Python 3.11 on Windows and Linux.

Install the latest release from PyPI with:

pip install ansys-fluent-core

If you plan on doing local development of PyFluent with Git, install the latest release with:

git clone https://github.com/ansys/pyfluent.git
cd pyfluent
pip install pip -U
pip install -e .
python codegen/allapigen.py  # Generates the API files

Dependencies

You must have a licensed copy of Ansys Fluent installed locally. PyFluent supports Fluent 2022 R2 and later. The Windows installation of Ansys Fluent automatically sets the required environment variables so that PyFluent can find the Ansys Fluent installation. Using Fluent 2023 R1 (or 23.1) installed in the default directory as an example, the installer automatically sets the AWP_ROOT231 environment variable to point to C:\Program Files\ANSYS Inc\v231.

On Linux, the required environment variable is not set automatically, and can be set for the current user in the current shell session, using Fluent 2023 R1 in the default installation directory as an example, before running PyFluent, with:

export AWP_ROOT231=/usr/ansys_inc/v231

For this setting to persist between different shell sessions for the current user, the same export command can instead be added to the user's ~/.profile file.

Getting started

Launching Fluent

To launch Fluent from Python, use the launch_fluent method:

import ansys.fluent.core as pyfluent
solver_session = pyfluent.launch_fluent(mode="solver")
solver_session.health_check_service.is_serving

Basic usage

You can use the solver_session.tui interface to run all Fluent TUI commands:

solver_session.tui.file.read_case('elbow.cas.h5')
solver_session.tui.define.models.unsteady_2nd_order("yes")
solver_session.tui.solve.initialize.initialize_flow()
solver_session.tui.solve.dual_time_iterate(2, 3)

You can also install and use these PyFluent libraries:

• PyFluent Parametric, which provides access to Fluent's parametric workflows.
• PyFluent Visualization, which provides postprocessing and visualization capabilities using the pyvista and matplotlib packages.

License and acknowledgments

PyFluent is licensed under the MIT license.

PyFluent makes no commercial claim over Ansys whatsoever. This library extends the functionality of Ansys Fluent by adding a Python interface to Fluent without changing the core behavior or license of the original software. The use of the interactive Fluent control of PyFluent requires a legally licensed local copy of Fluent.

For more information on Fluent, see the Ansys Fluent page on the Ansys website.