A high-precision calculation method for interface normal and curvature on an unstructured grid
We develop a new height function method which works on an unstructured grid. Geometric relationships are used to calculate interface normal and curvature. The calculation accuracy of interface normal shows roughly second-order accuracy. The numerical error in interface curvature shows the monotonic decreasing trends with cell size.
interface normal curvature unstructured grid interfacial flow volume-of-fluid