diff --git a/Documentation/ProjectFile/prj/processes/process/LIQUID_FLOW/material_property/solid/i_solid.md b/Documentation/ProjectFile/prj/processes/process/LIQUID_FLOW/material_property/solid/i_solid.md
new file mode 100644
index 0000000000000000000000000000000000000000..10e806ec9120b9a321904b4b461bd8da1468dd0c
--- /dev/null
+++ b/Documentation/ProjectFile/prj/processes/process/LIQUID_FLOW/material_property/solid/i_solid.md
@@ -0,0 +1 @@
+Property of solid phase of liquid flow process.
diff --git a/Documentation/ProjectFile/prj/processes/process/LIQUID_FLOW/material_property/solid/t_biot_constant.md b/Documentation/ProjectFile/prj/processes/process/LIQUID_FLOW/material_property/solid/t_biot_constant.md
new file mode 100644
index 0000000000000000000000000000000000000000..38343bfd1f58f621e53be93674819bad19886aab
--- /dev/null
+++ b/Documentation/ProjectFile/prj/processes/process/LIQUID_FLOW/material_property/solid/t_biot_constant.md
@@ -0,0 +1 @@
+Biot's constant for the liquid thermal expansion computation.
diff --git a/Documentation/ProjectFile/prj/processes/process/LIQUID_FLOW/material_property/solid/t_thermal_expansion.md b/Documentation/ProjectFile/prj/processes/process/LIQUID_FLOW/material_property/solid/t_thermal_expansion.md
new file mode 100644
index 0000000000000000000000000000000000000000..984c939c457d5a62efcddc947cc69541f9354d42
--- /dev/null
+++ b/Documentation/ProjectFile/prj/processes/process/LIQUID_FLOW/material_property/solid/t_thermal_expansion.md
@@ -0,0 +1 @@
+Liquid thermal expansion.