KR510: TGrid: What is the difference between buffer layer and peel layer? What are the optimal values for them?

Buffer Layers specifies the number of additional layers to be added in order to have a smooth transition from fine to coarse cells. As buffer layers number increases the transition is smoother.
Peel Layers control the gap between hexcore mesh and the geometry. As the peel layer number increases the tetrahedral cells between the geometry and hexcore mesh increases.
In most cases, default values give good results but can be modified as per user requirement.

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