diff --git a/examples/00-fluent/mixing_elbow.py b/examples/00-fluent/mixing_elbow.py
index 5379fb034449..1b044e0085aa 100644
--- a/examples/00-fluent/mixing_elbow.py
+++ b/examples/00-fluent/mixing_elbow.py
@@ -353,6 +353,21 @@
     "quit",
 )
 
+###############################################################################
+# Create expression report definition
+# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+# Create a report definition of single value expression type computing the difference
+# of area-averaged static pressure over cold-inlet and oulet. The name of the
+# report definition is ``"ave-pressure-diff"``.
+
+solver.tui.solve.report_definitions.add(
+    "ave-pressure-diff",
+    "single-val-expression",
+    "define",
+    "\"AreaAve(StaticPressure, ['cold-inlet'])-AreaAve(StaticPressure, ['outlet'])\"",
+    "quit",
+)
+
 ###############################################################################
 # Create convergence condition
 # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~