The surface‐reconstruction virtual‐region mesh update method for problems with topology changes

In this work, we introduce a novel boundary-conforming mesh-update method that is particularly designed for problems with large boundary displacements and topology changes. This method, which call the surface-reconstruction virtual-region mesh update integrates virtual region approach surface reconstruction process to handle complex movements. The allows having an activated deactivated part of mesh, where elements can freely enter or leave domain. Furthermore, ensures conformity robustness proposed shown in two numerical examples: variation benchmark Poiseuille flow, flow simulation during closing diaphragm valve. particular, valve includes movement, geometry, motion. For case, both steady transient results at different conditions are presented.