During aeroelastic simulation, forces and displacements must be interpolated between the non-matching fluid and structural meshes, while the volume fluid mesh must deform as the surface moves. Fluidstructure interpolation is necessary because numerical models for fluids and structures use different solvers, and at the interface these meshes do not match. The problem of mesh motion arises from the fact that the discretised fluid volume must conform to the motion of the surface, which means motion of the surface must be diffused into the volume.