diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 000000000..ce69594ee
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,6 @@
+[submodule "submodules/libROUNDSchemes"]
+	path = submodules/libROUNDSchemes
+	url = https://github.com/advanCFD/libROUNDSchemes.git
+[submodule "submodules/WENOEXT"]
+	path = submodules/WENOEXT
+	url = https://github.com/WENO-OF/WENOEXT.git
diff --git a/docs/source/qs/install.rst b/docs/source/qs/install.rst
index 2a09ae83c..8c27b15cb 100644
--- a/docs/source/qs/install.rst
+++ b/docs/source/qs/install.rst
@@ -81,6 +81,15 @@ Then source the bashrc file by:
 
     git clone https://github.com/deepmodeling/deepflame-dev.git
 
+If the user want to use the submodules inluded in DeepFlame: the `WENO scheme <https://github.com/WENO-OF/WENOEXT>`_ and the `libROUNDSchemes <https://github.com/advanCFD/libROUNDSchemes>`_, run
+
+.. code-block:: bash
+
+    git clone --recursive https://github.com/deepmodeling/deepflame-dev.git
+
+Detailed instructions for compiling these two submodules can be found in their repositories. 
+
+
 **3. Configure the DeepFlame environment:**
 
 .. code-block:: bash
diff --git a/intelligent-combustion b/intelligent-combustion
deleted file mode 160000
index 64890eabe..000000000
--- a/intelligent-combustion
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 64890eabe64d91e042c9808e40156867aa53c2f0
diff --git a/submodules/WENOEXT b/submodules/WENOEXT
new file mode 160000
index 000000000..f45593abd
--- /dev/null
+++ b/submodules/WENOEXT
@@ -0,0 +1 @@
+Subproject commit f45593abd480d9f1ea2056cefd2f6626bebab497
diff --git a/submodules/libROUNDSchemes b/submodules/libROUNDSchemes
new file mode 160000
index 000000000..6230bae27
--- /dev/null
+++ b/submodules/libROUNDSchemes
@@ -0,0 +1 @@
+Subproject commit 6230bae27b72b6723ae14c21f19258ff86065370