upgrade/v2312-User-Upgrade-Guide.md

@@ -5,22 +5,29 @@
 [![upgrade](/icons/chevrons-up.svg "upgrade guide")][upgrade-guide]
 [![code](/icons/code.svg "coding patterns")][code-patterns]
 
-***Preview information, subject to change at any time !!!***
-
 [[_TOC_]]
 
-## Deprecation and Removal
+<!-- ## Deprecation and Removal -->
 
-### Deprecated Models
+<!-- ### Deprecated Models -->
 
-## Rename
+<!-- ## Rename -->
 
-## Configuration / Environment
+<!-- ## Configuration / Environment -->
 
-## Input Dictionaries
+<!-- ## Input Dictionaries -->
 
 ## Changes in behaviour
 
+### Default EnSight format
+
+- the default ensight output used by function objects and writers now
+  uses \c binary format more consistently instead of relying upon the
+  \c writeFormat specified by the simulation controlDict. This change
+  makes the behaviour more consistent with utilities such as
+  foamToEnsight and with other function objects and writers.
+
+
 ### Function object: `Lambda2`
 
 The output of the `Lambda2` function object has been corrected through an
@@ -28,6 +35,15 @@ alteration in the governing equation, specifically by reversing its sign.
 Consequently, the negative field values observed in the pre-`v2312` version of
 `Lambda2` are now rendered positive (and vice versa) in the `v2312` release.
 
+
+## Rename
+
+### Function object: `WeberNumberReacting`
+
+The Lagrangian function-object class `WeberNumberReacting` is renamed
+as `ReactingWeberNumber` to ensure the consistency with the new Lagrangian
+cloud function object `KinematicWeberNumber`.
+
 ----
 
 [code-patterns]: /coding/patterns/patterns