Add solids4foam to the system tests

perpendicular-flap/metadata.yaml

@@ -73,8 +73,8 @@ cases:
     run: ./run.sh
     component: openfoam-adapter
 
-  # solid-solids4foam:
-  #   participant: Solid
-  #   directory: ./solid-solids4foam
-  #   run: ./run.sh
-  #   component: openfoam-adapter
+  solid-solids4foam:
+    participant: Solid
+    directory: ./solid-solids4foam
+    run: ./run.sh
+    component: solids4foam

perpendicular-flap/solid-solids4foam/system/fvSchemes

@@ -18,7 +18,7 @@ ddtSchemes
 
 gradSchemes
 {
-    default            extendedLeastSquares 0;
+    default            leastSquaresS4f 0;
 }
 
 divSchemes
@@ -46,6 +46,6 @@ interpolationSchemes
     interpolate(impK)  linear;
     interpolate(grad(D)) linear;
     interpolate(grad(DD)) linear;
-    interpolate(sigma0) linear;
+    interpolate(sigma) linear;
 }
 

tools/tests/component-templates/solids4foam.yaml

@@ -0,0 +1,16 @@
+build: 
+  context: {{ dockerfile_context }}
+  args:
+    {% for key, value in build_arguments.items() %}
+      - {{key}}={{value}}
+    {% endfor %}
+  target: solids4foam
+depends_on:    
+  prepare:
+    condition: service_completed_successfully
+volumes:
+  - {{ run_directory }}:/runs
+command: >
+  /bin/bash -c "id && 
+  cd '/runs/{{ tutorial_folder }}/{{ case_folder }}' &&
+  openfoam {{ run }} | tee system-tests_{{ case_folder }}.log 2>&1"

tools/tests/components.yaml

@@ -90,6 +90,22 @@ dune-adapter:
       repository: https://github.com/precice/dune-adapter
       default: "main"
 
+
+solids4foam:
+  repository: https://github.com/solids4foam/solids4foam
+  template: component-templates/solids4foam.yaml
+  build_arguments:
+    PLATFORM:
+      description: Dockerfile platform used
+      default: "ubuntu_2404"
+      # The name "PLATFORM" is misleading: For this component, we use a different base image.
+    TUTORIALS_REF:
+      description: Tutorial git reference to use
+      default: "master"
+    OPENFOAM_ADAPTER_REF:
+      description: Reference/tag of the OpenFOAM adapter to use
+      default: "master"
+
 fenics-adapter:
   template: component-templates/fenics-adapter.yaml
   build_arguments:

tools/tests/dockerfiles/ubuntu_2404/Dockerfile

@@ -450,3 +450,67 @@ RUN cd "${SU2_HOME}" &&\
     ./meson.py build -Denable-pywrapper=true --prefix=$SU2_RUN &&\
     ./ninja -C build install
 ### end of su2_adapter stage ###
+
+
+#####################################################################
+#            Build stages using third-party base images             #
+#####################################################################
+
+
+FROM solids4foam/solids4foam:v2.3-openfoam-v2412-latest as solids4foam
+
+ARG PRECICE_UID=1000
+ARG PRECICE_GID=1000
+ARG OPENFOAM_ADAPTER_PR
+ARG OPENFOAM_ADAPTER_REF
+
+USER root
+SHELL ["/bin/bash", "-c"]
+ENV DEBIAN_FRONTEND=noninteractive
+
+# Set the same user as the rest of the system tests components, for consistency.
+RUN set -eux; \
+    if getent group "${PRECICE_GID}" >/dev/null; then \
+        existing_group="$(getent group "${PRECICE_GID}" | cut -d: -f1)"; \
+        if [ "${existing_group}" != "precice" ]; then \
+            groupmod -n precice "${existing_group}"; \
+        fi; \
+    else \
+        groupadd -g "${PRECICE_GID}" precice; \
+    fi; \
+    if getent passwd "${PRECICE_UID}" >/dev/null; then \
+        existing_user="$(getent passwd "${PRECICE_UID}" | cut -d: -f1)"; \
+        if [ "${existing_user}" != "precice" ]; then \
+            usermod -l precice -d /home/precice -m "${existing_user}"; \
+        fi; \
+        usermod -g "${PRECICE_GID}" precice; \
+    else \
+        useradd -u "${PRECICE_UID}" -g "${PRECICE_GID}" -ms /bin/bash precice; \
+    fi; \
+    mkdir -p /home/precice; \
+    chown -R "${PRECICE_UID}:${PRECICE_GID}" /home/precice
+
+# The base image provides all binaries under /root/, but we prefer to build as a regular user.
+RUN mv /root/OpenFOAM/ /home/precice/OpenFOAM/ && \
+    chown -R "${PRECICE_UID}:${PRECICE_GID}" /home/precice/OpenFOAM
+
+# Set a general openfoam executable, to make the component template version-independent
+RUN ln -sf /usr/bin/openfoam2412 /usr/bin/openfoam
+
+RUN apt-get -qq update && \
+    apt-get -qq -y install wget git
+
+# preCICE v3.4 was the last release to support Ubuntu 22.04 (used as a base image),
+# so there is no reason to accept the preCICE version as an argument and build it from source.
+# Rework this part once a newer base image is used.
+RUN  wget https://github.com/precice/precice/releases/download/v3.4.1/libprecice3_3.4.1_jammy.deb && \
+     apt-get -qq -y install ./libprecice3_3.4.1_jammy.deb
+
+USER precice
+WORKDIR /home/precice
+
+RUN git clone https://github.com/precice/openfoam-adapter.git &&\
+    cd openfoam-adapter && \
+    if [ -n "${OPENFOAM_ADAPTER_PR}" ]; then git fetch origin pull/${OPENFOAM_ADAPTER_PR}/head; fi && \
+    git checkout ${OPENFOAM_ADAPTER_REF} && \
+    /usr/bin/openfoam2412 ./Allwmake -j $(nproc)

tools/tests/reference_versions.yaml

@@ -25,7 +25,7 @@ OPENFOAM_ADAPTER_REF: "2c3062c" # develop, May 27, 2026
 PRECICE_REF: "v3.4.1"
 PYTHON_BINDINGS_REF: "v3.4.0"
 SU2_ADAPTER_REF: "5abe79b"      # develop, May 27, 2026
-TUTORIALS_REF: "develop"
+TUTORIALS_REF: "solids4foam-component"
 
 # Additional settings
 PRECICE_PRESET: "production-audit"

tools/tests/tests.yaml

@@ -496,6 +496,13 @@ test_suites:
           - solid-openfoam
         max_time: 0.03
         reference_result: ./perpendicular-flap/reference-results/fluid-openfoam_solid-openfoam.tar.gz
+      - &perpendicular-flap_fluid-openfoam_solid-solids4foam
+        path: perpendicular-flap
+        case_combination:
+          - fluid-openfoam
+          - solid-solids4foam
+        max_time: 0.1
+        reference_result: ./perpendicular-flap/reference-results/fluid-openfoam_solid-solids4foam.tar.gz
       - &perpendicular-flap_fluid-su2_solid-fenics
         path: perpendicular-flap
         case_combination:
@@ -868,6 +875,10 @@ test_suites:
       - *partitioned-heat-conduction-mixedbc_left-openfoam_right-openfoam
       - *partitioned-heat-conduction-robin_left-openfoam_right-openfoam
 
+  solids4foam:
+    tutorials:
+      - *perpendicular-flap_fluid-openfoam_solid-solids4foam
+
   su2-adapter:
     tutorials:
       - *flow-over-heated-plate_fluid-su2_solid-openfoam