Keep Fluid Cross Area on Update/Refresh. For a line body geometry, when you set the Model Type property to Thermal Fluid, there is a new preference, Keep Fluid Cross Area on Update/Refresh (Options > Geometry), that enables you to prevent the application from resetting the value if you update the source geometry. Options include Yes and No (default).

You can now add multiple Body Merge objects to a model. Individual Body Merge objects can be nested within a larger Body Merge, making it easier to assemble complex parts.

When you add a Body Merge, the Mechanical application creates a Body Merges group in the Model tree (if one is not already present), then adds a Body Merge object within the group. The new Body Merge object is automatically assigned a number (#1 Body Merge, #2 Body Merge, and so forth) in the order that it is created.