Introduction
Subsurfaces are lines, rectangles, or ellipses defined in the UW coordinates on an OpenVSP model surface. These features are honored by the CompGeom, CFD Mesh, and DegenGeom functions and may be used to model inlet/outlet boundary conditions, control surfaces, material properties, surface roughness, etc. This video provides an overview of the Subsurface panel in the OpenVSP GUI and demonstrates some basic use.