In a Dual Domain model, the thickness of the part is determined by calculating the distance between the elements on opposite sides of the part. Ideally, there would be a one-to-one correspondence between the elements, but in general this is not the case due to differences in the pattern of the mesh, or differences in geometry or curvature on either side of the part, etc.
Mesh matching is especially important for Dual Domain Fiber Warp analysis because inconsistent fiber orientation on both skins arising from mesh anomalies, rather than true flow behavior in the cavity, can adversely affect the warpage prediction.
Mesh translators include mesh-matching technology to maximize the number of elements matched on opposite skins of the Dual Domain mesh. The level of mesh matching achieved is summarized in the Mesh Match report, and can be displayed graphically in the Dual Domain Mesh Match Diagnostic plot.