docs: Added example on one way fsi

.github/workflows/ci.yml

@@ -633,8 +633,8 @@ jobs:
     needs: [test, update-changelog, nightly-dev-test]
     runs-on: ubuntu-latest
     permissions:
-      id-token: write # required for trusted publishing
-      contents: write # required for GitHub release upload
+      id-token: write       # required for trusted publishing
+      contents: write       # required for GitHub release upload
 
     steps:
       - name: Set up Python
@@ -647,7 +647,7 @@ jobs:
 
       - name: Upload to Private PyPi
         run: |
-          pip install 'twine<6.2.0'
+          pip install twine
           python -m twine upload --skip-existing ./**/*.whl
           python -m twine upload --skip-existing ./**/*.tar.gz
         env:

.github/workflows/execute-examples-weekly.yml

@@ -161,6 +161,9 @@ jobs:
         run: |
           python examples/00-fluent/steady_vortex.py
 
+      - name: Execute fsi_1way_workflow.py
+        run: |
+          python examples/00-fluent/fsi_1way_workflow.py
 
       # https://github.com/ansys/pyfluent/issues/4157
       # - name: Execute conjugate_heat_transfer.py
@@ -182,4 +185,4 @@ jobs:
 
       - name: Remove all docker images
         if: always()
-        run: make docker-clean-images
+        run: make docker-clean-images

doc/changelog.d/4407.documentation.md

@@ -0,0 +1 @@
+Added example on one way fsi

doc/source/conf.py

@@ -152,7 +152,7 @@ def _stop_fluent_container(gallery_conf, fname):
     # path where to save gallery generated examples
     "gallery_dirs": ["examples"],
     # Pattern to search for example files
-    "filename_pattern": r"exhaust_system_settings_api\.py|external_compressible_flow\.py|mixing_elbow_settings_api\.py|modeling_cavitation\.py|species_transport\.py|ahmed_body_workflow\.py|brake\.py|DOE_ML\.py|radiation_headlamp\.py|parametric_static_mixer_1\.py|conjugate_heat_transfer\.py|tyler_sofrin_modes\.py|lunar_lander_thermal\.py|modeling_ablation\.py|frozen_rotor_workflow\.py|mixing_tank_workflow\.py|single_battery_cell_workflow\.py|steady_vortex\.py",
+    "filename_pattern": r"exhaust_system_settings_api\.py|external_compressible_flow\.py|mixing_elbow_settings_api\.py|modeling_cavitation\.py|species_transport\.py|ahmed_body_workflow\.py|brake\.py|DOE_ML\.py|radiation_headlamp\.py|parametric_static_mixer_1\.py|conjugate_heat_transfer\.py|tyler_sofrin_modes\.py|lunar_lander_thermal\.py|modeling_ablation\.py|frozen_rotor_workflow\.py|mixing_tank_workflow\.py|single_battery_cell_workflow\.py|steady_vortex\.py|fsi_1way_workflow\.py",
     # Do not execute examples
     "plot_gallery": False,
     # Remove the "Download all examples" button from the top level gallery

doc/source/contributing/environment_variables.rst

@@ -77,4 +77,4 @@ control the behavior of PyFluent within the same Python process. Please see the
     * - REMOTING_SERVER_ADDRESS
       - Specifies the IP address of the Fluent server while launching Fluent in :func:`launch_fluent() <ansys.fluent.core.launcher.launcher.launch_fluent>`.
     * - SERVER_INFO_DIR
-      - Specifies the directory where the server-info file is created while launching Fluent in :func:`launch_fluent() <ansys.fluent.core.launcher.launcher.launch_fluent>`.
+      - Specifies the directory where the server-info file is created while launching Fluent in :func:`launch_fluent() <ansys.fluent.core.launcher.launcher.launch_fluent>`.

examples/00-fluent/fsi_1way_workflow.py

@@ -0,0 +1,262 @@
+# Copyright (C) 2021 - 2025 ANSYS, Inc. and/or its affiliates.
+# SPDX-License-Identifier: MIT
+#
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+""".. _One_Way_FSI_Simulation:
+
+Modeling One-Way Fluid-Structure Interaction
+-------------------------------------------------------------
+"""
+
+# %%
+# Objective
+# ---------
+#
+# This example models turbulent airflow through a cylindrical test chamber
+# that contains a steel probe. The airflow generates aerodynamic forces on
+# the probe, causing it to deform. In this case, the deformation is expected
+# to be small compared with the overall flow field. Because the probe’s motion
+# does not significantly alter the airflow, we can treat the problem using
+# a one-way fluid–structure interaction (FSI) approach.
+#
+# In a one-way FSI analysis, the fluid flow is solved first and the
+# resulting forces are transferred to the structural model. The
+# structural response is then computed independently, without feeding
+# back into the fluid solution. This contrasts with a two-way FSI
+# analysis, where structural deformation and fluid flow are solved
+# in a fully coupled manner. The one-way approach is computationally
+# more efficient and appropriate when structural feedback on the flow
+# can be neglected.
+
+# %%
+# Problem Description
+# -------------------
+#
+# The cylindrical test chamber is 20 cm long, with a diameter of 10 cm.
+# Turbulent air enters the chamber at 100 m/s, flows around and through
+# the steel probe, and exits through a pressure outlet.
+#
+#
+# .. image:: ../../_static/fsi_1way_1.png
+#    :align: center
+#    :alt: One-Way Fluid-Structure Interaction Model
+
+# %%
+# Import modules
+# --------------
+#
+# .. note::
+#   Importing the following classes offer streamlined access to key solver settings,
+#   eliminating the need to manually browse through the full settings structure.
+
+import os
+
+import ansys.fluent.core as pyfluent
+from ansys.fluent.core import FluentMode, Precision, examples
+from ansys.fluent.core.solver import (
+    BoundaryConditions,
+    Contour,
+    Graphics,
+    Initialization,
+    RunCalculation,
+    Setup,
+    Solution,
+    VelocityInlet,
+)
+
+# %%
+# Launch Fluent session in solver mode
+# ------------------------------------
+
+solver = pyfluent.launch_fluent(
+    precision=Precision.DOUBLE,
+    mode=FluentMode.SOLVER,
+)
+
+# %%
+# Download and read the mesh file
+# -------------------------------
+
+mesh_file = examples.download_file(
+    "fsi_1way.msh.h5",
+    "pyfluent/fsi_1way",
+    save_path=os.getcwd(),
+)
+solver.settings.file.read_case(file_name=mesh_file)
+
+# %%
+# Configure solver settings for fluid flow
+# ----------------------------------------
+
+velocity_inlet = VelocityInlet(solver, name="velocity_inlet")
+velocity_inlet.momentum.velocity_magnitude = 100.0  # High-speed inlet flow (m/s)
+velocity_inlet.turbulence.turbulent_viscosity_ratio = (
+    5  # Dimensionless, typically 1-10 for moderate turbulence
+)
+
+# %%
+# Initialize and run fluid flow simulation
+# ----------------------------------------
+
+initialize = Initialization(solver)
+initialize.hybrid_initialize()
+
+calculation = RunCalculation(solver)
+calculation.iterate(iter_count=100)
+
+# %%
+# Post-processing
+# ---------------
+
+graphics = Graphics(solver)
+graphics.picture.x_resolution = 650  # Horizontal resolution for clear visualization
+graphics.picture.y_resolution = 450  # Vertical resolution matching typical aspect ratio
+
+graphics.contour["contour-vel"] = {
+    "field": "velocity-magnitude",
+    "surfaces_list": ["fluid-symmetry"],
+    "coloring": {"option": "banded"},
+}
+
+graphics.contour["contour-vel"].display()
+graphics.views.restore_view(view_name="front")
+
+graphics.picture.save_picture(file_name="fsi_1way_2.png")
+
+
+# %%
+# .. image:: ../../_static/fsi_1way_2.png
+#    :align: center
+#    :alt: Velocity Contour
+
+# %%
+# Structural model and material setup
+# -----------------------------------
+# To analyze the deformation of a steel probe under fluid flow,
+# Linear Elasticity Structural model is chosen
+
+setup = Setup(solver)
+setup.models.structure.model = "linear-elasticity"
+solver.settings.setup.models.structure.model = "linear-elasticity"
+
+# Copy materials from the database and assign to solid zone
+
+setup.materials.database.copy_by_name(type="solid", name="steel")
+setup.cell_zone_conditions.solid["solid"] = {"general": {"material": "steel"}}
+
+# %%
+# Structural boundary conditions
+# ------------------------------
+# configure Fluent to define the steel probe's support and movement using
+# structural boundary conditions
+
+wall_boundary = BoundaryConditions(solver)
+
+# Configure solid-symmetry boundary
+wall_boundary.wall["solid-symmetry"] = {
+    "structure": {
+        "z_disp_boundary_value": 0,
+        "z_disp_boundary_condition": "Node Z-Displacement",
+    }
+}
+
+# Set solid-top boundary (fully fixed)
+wall_boundary.wall["solid-top"] = {
+    "structure": {
+        "z_disp_boundary_value": 0,
+        "z_disp_boundary_condition": "Node Z-Displacement",
+        "y_disp_boundary_value": 0,
+        "y_disp_boundary_condition": "Node Y-Displacement",
+        "x_disp_boundary_value": 0,
+        "x_disp_boundary_condition": "Node X-Displacement",
+    }
+}
+
+# Copy boundary conditions from solid-symmetry to solid-symmetry:011
+wall_boundary.copy(from_="solid-symmetry", to=["solid-symmetry:011"])
+
+# Configure FSI surface
+wall_boundary.wall["fsisurface-solid"] = {
+    "structure": {
+        "x_disp_boundary_condition": "Intrinsic FSI",
+        "y_disp_boundary_condition": "Intrinsic FSI",
+        "z_disp_boundary_condition": "Intrinsic FSI",
+    }
+}
+
+# %%
+# Inclusion of Operating Pressure in Fluid-Structure Interaction Forces
+# ---------------------------------------------------------------------
+# Fluent uses gauge pressure for fluid-structure interaction force calculations.
+# By setting  ``include_pop_in_fsi_force`` to  ``True``, Fluent uses absolute pressure.
+
+setup.models.structure.expert.include_pop_in_fsi_force = True
+
+# %%
+# Configure flow settings
+# -----------------------
+# Disable flow equations for structural simulation
+
+solution = Solution(solver)
+solution.controls.equations["flow"] = False
+solution.controls.equations["kw"] = False
+
+# %%
+# Run FSI simulation
+# ------------------
+
+solver.settings.file.write_case(file_name="probe_fsi_1way.cas.h5")
+
+calculation.iterate(iter_count=2)
+
+# %%
+# Structural Postprocessing
+# -------------------------
+
+displacement_contour = Contour(solver, new_instance_name="displacement_contour")
+
+displacement_contour.field = "total-displacement"
+displacement_contour.surfaces_list = ["fsisurface-solid"]
+
+displacement_contour.display()
+graphics.views.restore_view(view_name="isometric")
+graphics.picture.save_picture(file_name="fsi_1way_3.png")
+
+# save the case and data file
+solver.settings.file.write_case_data(file_name="probe_fsi_1way")
+
+# %%
+# .. image:: ../../_static/fsi_1way_3.png
+#    :align: center
+#    :alt: Structural Displacement Contour
+
+# %%
+# Close Fluent
+# ------------
+solver.exit()
+
+#######################################################################################
+# References:
+# =====================================================================================
+# .. _Reference:
+# [1] Modeling One-Way Fluid-Structure Interaction (FSI) Within Fluent, `Ansys Fluent documentation​ <https://ansyshelp.ansys.com/public/account/secured?returnurl=/Views/Secured/corp/v252/en/flu_tg/flu_tg_fsi_1way.html>`_.
+
+# sphinx_gallery_thumbnail_path = '_static/fsi_1way_2.png'