Machine assisted systems and methods for use in meshing a periodic pattern of a geometry that represents a physical structure in a simulation of the physical structure are described. The method can include operations: identifying a master region in a periodic pattern of a geometry that represents a physical structure in a simulation of the physical structure that has the periodic pattern; and generating a mesh based on the identified master region, the mesh including a non-planar boundary at a boundary between patterns in the periodic pattern, wherein the master region is only a portion of the representation of the physical structure.
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