Geometry idealization > Creating midsurfaces before meshing
Working with the Face Pair list
The Face Pair List in the Midsurface by Face Pairs dialog box lists all face pairs and lists information about each pair. The name of each face pair indicates:
The face pairing strategy used to define the pair or whether the mid-sheet is a replacement mid-sheet.
The trimming option for the pair.
The unique ID for the face pair.
For example, a face pair listed as Automatic Pair(Standard)(5) indicates that:
The pair was created by an automatic pairing method, such as Thickness or Progressive.
The current trimming method for the mid-sheet is Standard Trimming.
The unique ID for the face pair is 5.
Modifying existing face pairs
You can use the Face Pair List to modify existing face pairs. For example, you can select a pair in the Face Pair List to:
Examine or modify the faces used to define side 1 and side 2 of the pair.
Reverse the faces designated as side 1 and side 2 in the pair.
Modify the mid-sheet creation or trimming method applied to that pair. See Understanding midsurface creation and trimming methods for more information.
Delete a pair.
You can also use the Merge Face Pairs option to merge multiple, selected face pairs into a single face pair. The software creates a new manual face pair.
The side 1 face of the new pair is comprised of all the side 1 faces from the merged individual face pairs.
The side 2 face of the new pair is comprised of all the side 2 faces from the merged individual face pairs.
With the Face Pair List:
Click the name of a pair in the Face Pair List to select it for editing.
Click the name of the pair in the Face Pair List a second time to deselect the pair.
How do I
Create a midsurface by face pairs
Modify the face pairs in an existing midsurface
Define a midsurface with the Offset method
Define a midsurface with the User Defined method
Insert a replacement mid-sheet into a face pair
Learn more
Creating midsurfaces before meshing
Selecting appropriate parts for midsurfacing
Creating a midsurface by pairing faces
Understanding face pair creation
Understanding midsurface creation and trimming methods
Controlling midsurface display
Creating a midsurface with the Offset method
Creating user-defined midsurfaces
Quick links
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Working with the Face Pair list, Simcenter 3D 2021.1 Series
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Source: https://docs.sw.siemens.com/en-US/doc/289054037/PL20200601120302950.advanced/id1011842 · retrieved 2026-07-17