diff --git a/Documentation/ProjectFile/prj/processes/process/LIQUID_FLOW/darcy_gravity/i_darcy_gravity.md b/Documentation/ProjectFile/prj/processes/process/LIQUID_FLOW/darcy_gravity/i_darcy_gravity.md
deleted file mode 100644
index 6f6485f80c2f151b5bcbe8fab75aed4f833fab4a..0000000000000000000000000000000000000000
--- a/Documentation/ProjectFile/prj/processes/process/LIQUID_FLOW/darcy_gravity/i_darcy_gravity.md
+++ /dev/null
@@ -1 +0,0 @@
-A tag for the gravity term of the Darcy velocity.
diff --git a/Documentation/ProjectFile/prj/processes/process/LIQUID_FLOW/darcy_gravity/t_axis_id.md b/Documentation/ProjectFile/prj/processes/process/LIQUID_FLOW/darcy_gravity/t_axis_id.md
deleted file mode 100644
index cc87c3c11e3c010b90df0e9b72e23838a42e9e7d..0000000000000000000000000000000000000000
--- a/Documentation/ProjectFile/prj/processes/process/LIQUID_FLOW/darcy_gravity/t_axis_id.md
+++ /dev/null
@@ -1,2 +0,0 @@
-The ID of the axis, where the gravity force exists.
-It can be 0, 1, or the dimension of space minus one.
diff --git a/Documentation/ProjectFile/prj/processes/process/LIQUID_FLOW/darcy_gravity/t_g.md b/Documentation/ProjectFile/prj/processes/process/LIQUID_FLOW/darcy_gravity/t_g.md
deleted file mode 100644
index f155b6d4b6083dad27eb24865632b102380e7eee..0000000000000000000000000000000000000000
--- a/Documentation/ProjectFile/prj/processes/process/LIQUID_FLOW/darcy_gravity/t_g.md
+++ /dev/null
@@ -1,2 +0,0 @@
-The gravitational acceleration. Its value can be 9.81 with SI unit.
-For the case of non-gravity in the Darcy velocity, the value must be set to zero.
diff --git a/Documentation/ProjectFile/prj/processes/process/LIQUID_FLOW/t_specific_body_force.md b/Documentation/ProjectFile/prj/processes/process/LIQUID_FLOW/t_specific_body_force.md
new file mode 100644
index 0000000000000000000000000000000000000000..1e5a0224ea0b219f1a0f7346b5c13fc434c5d21c
--- /dev/null
+++ b/Documentation/ProjectFile/prj/processes/process/LIQUID_FLOW/t_specific_body_force.md
@@ -0,0 +1 @@
+Vector for specific body force (gravity).