Quadrilateral multiblock decomposition via auxiliary subdivision

Abstract Automatic quadrilateral (quad) or hexahedral (hex) multiblock decomposition has been a topic of research for many years. The key challenges are to automatically determine where place mesh singularities and how generate based on the get desired orientation distribution. In this work, new idea achieving these is proposed an auxiliary subdivision domain into smaller subdomains, followed by applying equation, which calculates net number surface, locate quad singularities. Under idea, two different methods presented medial axis inward boundary offset. Both conformal vertex classifications original domain, guarantees good quality at boundary. results compared with paving method cross-field method.