Singularity and mesh divergence of inviscid adjoint solutions at solid walls

Abstract

• Comprehensive review of the mesh dependence anomaly observed in two and three dimensional numerical adjoint solutions for subsonic and transonic inviscid flows past wings, airfoils and blunt bodies. • Review of the analytic adjoint solution obtained for the 2D incompressible Euler equations. • Identification of the origin of the mesh dependence anomaly as a singularity of the analytic solution. • Cross-comparison of analytic and numerical adjoint solutions for lift and drag.