The Fluent Meshing skewness measure is computed as the normalized maximum deviation from the ideal angle at face corners (60 degrees for a tri face or 90 degrees for a quad face) for surface elements, or the normalized maximum deviation from the ideal angle between face normals (for example, 90 degrees for a hexahedral element) for volume elements.
Note: The Fluent Meshing skewness values are inverted compared to other quality metrics in Ansys ICEM CFD. A value of 0 indicates the best quality element while a value of 1 indicates a degenerate element.