OpenFAST · andrew-platt · Sep 4, 2025 · Sep 4, 2025 · Sep 4, 2025 · Sep 5, 2025
diff --git a/.github/PULL_REQUEST_TEMPLATE.md b/.github/PULL_REQUEST_TEMPLATE.md
@@ -14,18 +14,16 @@
 **Additional supporting information**
 <!-- Add any other context about the problem here. -->
 
+**Generative AI usage**
+<!-- describe any generative AI used
+If substantial portions are generated with AI, include a reference like one of the following:
+Co-authored-by: Google Gemini <gemini@google.com>
+Co-authored-by: OpenAI ChatGPT <chatgpt@openai.com>
+Co-authored-by: Microsoft Copilot <copilot@microsoft.com>
+Co-authored-by: Anthropic Claude <claude@anthropic.com>
+Assisted by: GitHub Copilot <support@github.com>
+-->
+
 **Test results, if applicable**
 <!-- Add the results from unit tests and regression tests here along with justification for any failing test cases. -->
-
-<!-- Release checklist:
-- [ ] Update the documentation version in docs/conf.py
-- [ ] Update the versions in docs/source/user/api_change.rst
-- [ ] Verify readthedocs builds correctly
-- [ ] Create a tag in OpenFAST
-- [ ] Create a merge commit in r-test and add a corresponding tag
-- [ ] Compile executables for Windows builds
-    - [ ] FAST_SFunc.mexw64
-    - [ ] OpenFAST-Simulink_x64.dll
-    - [ ] openfast_x64.exe
-    - [ ] DISCON.dll
--->
+- [ ] r-test branch merging required
diff --git a/.github/scripts/build_windows_executables.bat b/.github/scripts/build_windows_executables.bat
@@ -35,6 +35,7 @@ devenv vs-build/TurbSim/TurbSim.vfproj /Build "Release|x64"
 devenv vs-build/UnsteadyAero/UnsteadyAero.sln /Build "Release|x64"
 
 @REM Build MATLAB solution last
+rd /s /q .\build\lib
 devenv vs-build/FAST/FAST.sln /Build "Release_Matlab|x64"
 
 @REM Copy controllers to bin directory

diff --git a/.github/workflows/automated-dev-tests.yml b/.github/workflows/automated-dev-tests.yml
@@ -368,10 +368,12 @@ jobs:
           path: |
             ${{github.workspace}}/build/reg_tests/glue-codes/openfast-cpp
             ${{github.workspace}}/build/reg_tests/glue-codes/python
+            ${{github.workspace}}/build/reg_tests/glue-codes/other
             ${{github.workspace}}/build/reg_tests/modules/aerodyn
             ${{github.workspace}}/build/reg_tests/modules/moordyn
             ${{github.workspace}}/build/reg_tests/modules/inflowwind
             ${{github.workspace}}/build/reg_tests/modules/hydrodyn
+            ${{github.workspace}}/build/reg_tests/modules/seastate
             !${{github.workspace}}/build/reg_tests/glue-codes/openfast-cpp/5MW_Baseline
 
 

diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
@@ -149,30 +149,15 @@ jobs:
         shell: cmd
         run: .github/scripts/windows_devenv_test.bat
 
-      - name: Install Intel oneAPI BaseKit (Windows)
+      - name: Install Intel oneAPI Fortran Essentials (Windows)
         shell: cmd
         env:
-          URL: https://registrationcenter-download.intel.com/akdlm/IRC_NAS/7dff44ba-e3af-4448-841c-0d616c8da6e7/w_BaseKit_p_2024.1.0.595_offline.exe
-          COMPONENTS: intel.oneapi.win.mkl.devel
+          URL: https://registrationcenter-download.intel.com/akdlm/IRC_NAS/b626b5cf-8a15-40a4-be9a-9edabbb7cf17/intel-fortran-essentials-2025.3.0.333_offline.exe
         run: |
           curl.exe --output %TEMP%\webimage.exe --url %URL% --retry 5 --retry-delay 5
           start /b /wait %TEMP%\webimage.exe -s -x -f webimage_extracted --log extract.log
           del %TEMP%\webimage.exe
-          webimage_extracted\bootstrapper.exe -s --action install --components=%COMPONENTS% --eula=accept -p=NEED_VS2017_INTEGRATION=0 -p=NEED_VS2019_INTEGRATION=0 -p=NEED_VS2022_INTEGRATION=1 --log-dir=.
-          set installer_exit_code=%ERRORLEVEL%
-          rd /s/q "webimage_extracted"
-          exit /b %installer_exit_code%
-
-      - name: Install Intel oneAPI HPCKit (Windows)
-        shell: cmd
-        env:
-          URL: https://registrationcenter-download.intel.com/akdlm/IRC_NAS/c95a3b26-fc45-496c-833b-df08b10297b9/w_HPCKit_p_2024.1.0.561_offline.exe
-          COMPONENTS: intel.oneapi.win.ifort-compiler
-        run: |
-          curl.exe --output %TEMP%\webimage.exe --url %URL% --retry 5 --retry-delay 5
-          start /b /wait %TEMP%\webimage.exe -s -x -f webimage_extracted --log extract.log
-          del %TEMP%\webimage.exe
-          webimage_extracted\bootstrapper.exe -s --action install --components=%COMPONENTS% --eula=accept -p=NEED_VS2017_INTEGRATION=0 -p=NEED_VS2019_INTEGRATION=0 -p=NEED_VS2022_INTEGRATION=1 --log-dir=.
+          webimage_extracted\bootstrapper.exe -s --action install --eula=accept -p=NEED_VS2017_INTEGRATION=0 -p=NEED_VS2019_INTEGRATION=0 -p=NEED_VS2022_INTEGRATION=1 --log-dir=.
           set installer_exit_code=%ERRORLEVEL%
           rd /s/q "webimage_extracted"
           exit /b %installer_exit_code%

diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -125,6 +125,11 @@ if (OPENMP)
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OpenMP_CXX_FLAGS}")
     link_libraries("${OpenMP_CXX_LIBRARIES}")
   endif()
+elseif (NOT BLA_VENDOR)
+  # If we're not using OpenMP, and a specific BLAS vendor has not been set, 
+  # set MKL threading to sequential to avoid potential issues with 
+  # small calculations taking longer due to threading overhead (turbsim).
+  set(MKL_THREADING "sequential")
 endif()
 
 #-------------------------------------------------------------------------------

diff --git a/README.rst b/README.rst
@@ -16,7 +16,7 @@ OpenFAST is a wind turbine simulation tool which builds on FAST v8. FAST.Farm
 extends the capability of OpenFAST to simulate multi-turbine wind farms. They were
 created with the goal of being community models developed and used by research
 laboratories, academia, and industry. They are managed by a dedicated team at the
-National Renewable Energy Lab. Our objective is to ensure that OpenFAST and FAST.Farm
+National Laboratory of the Rockies. Our objective is to ensure that OpenFAST and FAST.Farm
 are sustainable software that are well tested and well documented. If you'd like
 to contribute, see the `Developer Documentation <https://openfast.readthedocs.io/en/dev/source/dev/index.html>`_
 and any open GitHub issues with the
@@ -30,11 +30,11 @@ tag.
 Part of the WETO Stack
 ----------------------
 
-OpenFAST is primarily developed with the support of the U.S. Department of Energy and is part of the `WETO Software Stack <https://nrel.github.io/WETOStack>`_. For more information and other integrated modeling software, see:
+OpenFAST is primarily developed with the support of the U.S. Department of Energy and is part of the `WETO Software Stack <https://NatLabRockies.github.io/WETOStack>`_. For more information and other integrated modeling software, see:
 
-* `Portfolio Overview <https://nrel.github.io/WETOStack/portfolio_analysis/overview.html>`_
-* `Entry Guide <https://nrel.github.io/WETOStack/_static/entry_guide/index.html>`_
-* `OpenFAST Workshop <https://nrel.github.io/WETOStack/workshops/user_workshops_2024.html#openfast-ecosystem>`_
+* `Portfolio Overview <https://NatLabRockies.github.io/WETOStack/portfolio_analysis/overview.html>`_
+* `Entry Guide <https://NatLabRockies.github.io/WETOStack/_static/entry_guide/index.html>`_
+* `OpenFAST Workshop <https://NatLabRockies.github.io/WETOStack/workshops/user_workshops_2024.html#openfast-ecosystem>`_
 
 
 FAST v8 - OpenFAST
@@ -155,18 +155,18 @@ Please use `GitHub Issues <https://github.com/OpenFAST/OpenFAST/issues>`_ to:
 * report bugs
 * request code enhancements
 
-Users and developers may also be interested in the NREL National Wind
-Technology Center (NWTC) `phpBB Forum <https://wind.nrel.gov/forum/wind/>`_,
+Users and developers may also be interested in the NLR National Wind
+Technology Center (NWTC) `Forum <https://forums.nrel.gov/>`_,
 which is still maintained and has a long history of FAST-related questions
 and answers.
 
 Acknowledgments
 ---------------
 
 OpenFAST and FAST.Farm are maintained and developed by researchers and software
-engineers at the `National Renewable Energy Laboratory <http://www.nrel.gov/>`_
-(NREL), with support from the US Department of Energy's Wind Energy Technology
-Office. NREL gratefully acknowledges development contributions from the following
+engineers at the `National Laboratory of the Rockies <http://www.nlr.gov/>`_
+(NLR), with support from the US Department of Energy's Wind Energy Technology
+Office. NLR gratefully acknowledges development contributions from the following
 organizations:
 
 * Envision Energy USA, Ltd

diff --git a/docs/conf.py b/docs/conf.py
@@ -20,6 +20,7 @@
 import sys
 import subprocess
 import re
+import datetime
 
 #sys.path.append(os.path.abspath('_extensions/'))
 
@@ -127,18 +128,18 @@ def runDoxygen(sourcfile, doxyfileIn, doxyfileOut):
 master_doc = 'index'
 
 # General information about the project.
-project = u'OpenFAST'
-copyright = u'2023, National Renewable Energy Laboratory'
-author = u'OpenFAST Team'
+project = f'OpenFAST'
+copyright = f'{datetime.date.today().year}, National Renewable Energy Laboratory'
+author = f'OpenFAST Team'
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
 # built documents.
 #
 # The short X.Y version.
-version = u'4.1'
+version = f'4.1'
 # The full version, including alpha/beta/rc tags.
-release = u'v4.1.2'
+release = f'v4.1.2'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
@@ -226,8 +227,8 @@ def runDoxygen(sourcfile, doxyfileIn, doxyfileOut):
     (
         master_doc,
         'Openfast.tex',
-        u'OpenFAST Documentation',
-        u'National Renewable Energy Laboratory',
+        f'OpenFAST Documentation',
+        f'National Renewable Energy Laboratory',
         'manual'
     ),
 ]
@@ -241,7 +242,7 @@ def runDoxygen(sourcfile, doxyfileIn, doxyfileOut):
     (
         master_doc,
         'openfast',
-        u'OpenFAST Documentation',
+        f'OpenFAST Documentation',
         [author],
         1
     )
@@ -257,7 +258,7 @@ def runDoxygen(sourcfile, doxyfileIn, doxyfileOut):
     (
         master_doc,
         'OpenFAST',
-        u'OpenFAST Documentation',
+        f'OpenFAST Documentation',
         author,
         'OpenFAST',
         'One line description of project.',

diff --git a/docs/index.rst b/docs/index.rst
@@ -27,7 +27,7 @@ and underlying modules are mostly written in Fortran
 (adhering to the 2003 standard), and modules can also be written in C or
 C++. It was created with the goal of being a community model developed
 and used by research laboratories, academia, and industry. It is
-managed by a dedicated team at the National Renewable Energy Lab.
+managed by a dedicated team at the National Lab of the Rockies.
 Our objective is to ensure that OpenFAST is well tested, well
 documented, and self-sustaining software. To that end, we are continually
 improving the documentation and test coverage for existing code, and we

diff --git a/docs/source/install/install_vs_windows.rst b/docs/source/install/install_vs_windows.rst
@@ -11,21 +11,21 @@ Prerequisites
 
 1. A version of Visual Studio (VS).  
 
-    -  Currently VS 2013 Professional and VS 2015 Community Edition have been tested with OpenFAST.
+    -  NOTE: not all VS Studio versions are supported by the Intel compilers. In general, the Fortran compiler must be newer than Visual Studio.  A list of Intel Fortran compatible VS versions and specific installation notes are found `here <https://software.intel.com/en-us/intel-parallel-studio-xe-compilers-required-microsoft-visual-studio>`_.    
 
-    -  A list of Intel Fortran compatible VS versions and specific installation notes are found `here <https://software.intel.com/en-us/intel-parallel-studio-xe-compilers-required-microsoft-visual-studio>`_.    
+    -  Currently VS 2019 Community Edition, VS 2022 Professional, and VS 2022 Community Edition have been tested with OpenFAST.  Download VS 2022 Community `here <https://aka.ms/vs/17/release/vs_community.exe>`__.
 
-    -  The included C/C++ project files for MAP++ and the Registry are compatible with VS 2013, but will upgrade seemlessly to a newer version of VS.
+    -  When installing Visual Studio, select the ``Desktop development with C++`` under ``Workloads``.
 
-    -  If you download and install `Visual Studio 2015 Community Edition <https://go.microsoft.com/fwlink/?LinkId=691978&clcid=0x409>`__, you will need to be sure and select the ``C/C++ component`` using the ``Customize`` option.
+    -  Note: The included C/C++ project files for MAP++ and the Registry are compatible with VS 2019, but will upgrade seemlessly to a newer version of VS.
 
 2. Intel Fortran Compiler
 
-    -  Currently only version 2017.1 has been tested with OpenFAST, but any newer version should be compatible.
+    -  We recommend compiling with the IFX compiler from Intel.  This is included in the ``Intel Fortran Essentials`` installation package.  Currently tested with version 2025.3
 
-    -  You can download an Intel Fortran compiler `here <https://software.intel.com/en-us/fortran-compilers>`__.
+    -  You can download ``Intel Fortran Essentials`` `here <https://www.intel.com/content/www/us/en/developer/tools/oneapi/fortran-compiler-download.html>`__.  Note: do not install the ``oneAPI HPC Toolkit``
 
-    -  Only install Intel Fortran after you have completed your Visual Studio installation.
+    -  Only install Intel Fortran after you have completed your Visual Studio installation. Note that Intel Fortran must be compatible with your version of Visual Studio.  See `here <https://www.intel.com/content/www/us/en/developer/articles/reference-implementation/intel-compilers-compatibility-with-microsoft-visual-studio-and-xcode.html>`__ for compatibility tables.
 
 3. Git for Windows
 

diff --git a/docs/source/testing/index.rst b/docs/source/testing/index.rst
@@ -38,10 +38,9 @@ pushing new commits will trigger the tests.
 Obtaining and configuring the test suite
 ----------------------------------------
 Portions of the test suite are linked to the OpenFAST repository through a
-`git submodule`. Specifically, the following two repositories are included:
+`git submodule`. Specifically, the following repository is included:
 
 - `r-test <https://github.com/openfast/r-test>`__
-- `pFUnit <https://github.com/Goddard-Fortran-Ecosystem/pFUnit>`__
 
 .. tip::
 
@@ -56,8 +55,8 @@ build process with an additional CMake flag:
     # BUILD_TESTING     - Build the testing tree (Default: OFF)
     cmake .. -DBUILD_TESTING:BOOL=ON
 
-Aside from this flag, the default CMake configuration is suitable for most systems.
-See the :ref:`understanding_cmake` section for more details on configuring
-the CMake targets. While the unit tests must be built with CMake due to its external
-dependencies, the regression test may be executed without CMake, as described in
-:ref:`python_driver`.
+Aside from this flag, the default CMake configuration is suitable for most
+systems.  See the :ref:`understanding_cmake` section for more details on
+configuring the CMake targets. While the unit tests must be built with CMake due
+to its dependency on `test_drive` (included in the source code), the regression
+test may be executed without CMake, as described in :ref:`python_driver`.
diff --git a/docs/source/testing/unit_test.rst b/docs/source/testing/unit_test.rst
@@ -113,4 +113,3 @@ Some useful topics to consider when developing and testing for OpenFAST are:
 
 - `Test driven development <https://en.wikipedia.org/wiki/Test-driven_development#Test-driven_development_cycle>`__
 - `Separation of concerns <https://en.wikipedia.org/wiki/Separation_of_concerns>`__
-- `pFUnit usage <http://pfunit.sourceforge.net/page_Usage.html>`__
diff --git a/docs/source/user/aerodyn-aeroacoustics/App-usage.rst b/docs/source/user/aerodyn-aeroacoustics/App-usage.rst
@@ -112,20 +112,22 @@ Finally, the set Outputs contains a few options for the output data:
    levels are reported with (True) or without (False) the A-weighting
    correction; see :numref:`aa-sec-ModelUsage`.
 
--  **NAAOutFile** – Integer 1/2/3: flag to set the desired output file. When
+-  **NAAOutFile** – Integer 1/2/3/4: flag to set the desired output file. When
    set to 1, a value of overall sound pressure level at every **DT_AA** time
    step per observer is printed to file. When set to 2, the first output
    is accompanied by a second file where the total sound pressure level
    spectrum is printed per time step per observer. When set to
-   3, the two first outputs are accompanied by a third file where the
+   3, the two first output files are accompanied by a third file where the
    sound pressure level spectrum per noise mechanism is printed per time
    step per observer. When set to 4, a fourth file is generated with the
    values of overall sound pressure levels per node, per blade, 
    per observer, and per time step.
 
--  The following line contains the file name used to store the outputs.
-   The file name is attached with a 1, 2, 3, and 4 flag based on the
-   **NAAOutFile** options.
+-  The following line, **AAOutFile**, contains the root name for the files 
+   used to store the outputs. If set to "default", the default output file
+   root name will be used.
+   The file name is appended with a 1, 2, 3, and 4 flag based on the
+   **NAAOutFile** options. 
 
 The file must be closed by an END command.
 

diff --git a/docs/source/user/aerodyn-aeroacoustics/example/AeroAcousticsInput.dat b/docs/source/user/aerodyn-aeroacoustics/example/AeroAcousticsInput.dat
@@ -24,6 +24,6 @@ True         RoundedTip   - Logical indicating rounded tip (flag) [Only used if
 ======  Outputs  ====================================================================================
 False              AWeighting  - A-weighting Flag (flag)  
 3                 NrOutFile  - Number of Output files. 1 for Time Dependent Overall SPL, 2 for both 1 and Frequency and Time Dependent SPL as well, or 3 for both 1 and 2 and Acoustics mechanism dependent, 4 for 1-3 and the overall sound pressure levels per blade per node per observer 
-"IEA_LB_RWT-AeroAcoustics_"    AAOutFile   - No Extension needed the resulting file will have .out Name of file containing
+"IEA_LB_RWT-AeroAcoustics_"    AAOutFile   - No Extension needed; the resulting file(s) will end in #.out. Use "Default" to use the default output file name from OpenFAST.
 END of input file (the word "END" must appear in the first 3 columns of this last OutList line)
 ---------------------------------------------------------------------------------------
diff --git a/docs/source/user/elastodyn/input.rst b/docs/source/user/elastodyn/input.rst
@@ -181,7 +181,9 @@ Mass and Inertia
 
 **HubMass**     - Hub mass (kg)
 
-**HubIner**     - Hub inertia about rotor axis [3 blades] or teeter axis [2 blades] (kg m^2)
+**HubIner**     - Hub inertia about rotor axis (2 or 3-blades) (kg m^2)
+
+**HubIner_Teeter**     - Hub inertia about teeter axis (2-blades) (kg m^2)
 
 **GenIner**     - Generator inertia about HSS (kg m^2)
 

diff --git a/docs/source/user/fast.farm/InputFiles.rst b/docs/source/user/fast.farm/InputFiles.rst
@@ -637,11 +637,14 @@ These are used only if WAT=2.
 **WAT_DxDyDz**: [three floats, comma separated] 
 Distances (in meters) between points in the x, y, and z directions of the WAT_BoxFile 
 These are used only if WAT=2.
-When **WAT=1** the dimensions in each directions are taken as :math:`dx=dy=dz=0.03*\text{RotorDiamRef}`.
+When **WAT=1** the dimensions will be set to **[dX_high, dY_high, dZ_high]** if
+that is the same for all turbines, otherwise the dimeinaiona will be calculated
+using the guidance with :math:`dx=dy=dz=0.03*\text{RotorDiamRef}`.
+
 
 **WAT_ScaleBox**: [flag]  
 When set to True, the input turbulence box is scaled so that it has zero mean and unit standard deviation at every node.
-DEFAULT is False.
+DEFAULT is True.
 
 **WAT_k_Def** [five floats, comma separated] :math:`[k_\text{def}, k_\text{FMin}, k_\text{DMin}, k_\text{DMax}, e]`
 Tuning parameters for quasi-steady wake deficit effect in the wake-added
Original file line number	Diff line number	Diff line change
Expand Up		@@ -113,4 +113,3 @@ Some useful topics to consider when developing and testing for OpenFAST are:

		- `Test driven development <https://en.wikipedia.org/wiki/Test-driven_development#Test-driven_development_cycle>`__
		- `Separation of concerns <https://en.wikipedia.org/wiki/Separation_of_concerns>`__
		- `pFUnit usage <http://pfunit.sourceforge.net/page_Usage.html>`__