The Orientation at core result provides a good indication of how molecules will be oriented at the part core, showing the average principal alignment direction for the whole element.
The core orientation for each triangular element is perpendicular to the velocity vector before the center layer reaches the transition temperature. This is the most probable orientation in the core region of a part. The other possible orientation is in the direction of the velocity vector.
Without rigorous Fiber orientation analysis, core orientation provides a good indication of how molecules or fibers will be oriented when using a fiber-filled material. The magnitudes of these vectors are normalized to one and are displayed multiplied by the given scale factor. Core orientation is in the transverse direction of the flow.
The linear shrinkage of a part also depends on the orientation. For unfilled polymers, the shrinkage in the direction of skin (flow) orientation is greater than in the direction of core (transverse) orientation. However, this situation may be reversed when using fiber-filled polymers, because of the low shrinkage and stiffness of the fibers in the direction of skin orientation.