|Preprint-No.:||< 338 >||Published in:||March 2012||PDF-File:||IGPM338_k.pdf|
|Title:||A Note on Adjoint Error Estimation for One–Dimensional Stationary Conservation Laws with Shocks|
|Authors:||Jochen Schütz, Sebastian Noelle, Christina Steiner and Georg May|
We consider one-dimensional steady-state conservation laws with discontinuous solu- tions. Giles and Pierce  realized that a shock leads to a new term in the adjoint error representation for target functionals. This term disappears if and only if the adjoint solution satisfies an internal boundary condition. Curiously, most computer codes implementing adjoint error estimation ignore the new term in the functional, as well as the internal adjoint boundary condition. The purpose of this note is to justify this omission as follows: if one represents the exact forward and adjoint solu- tions as vanishing viscosity limits of the corresponding viscous problems, then the internal boundary condition is naturally satisfied in the limit.
|Keywords:||adjoint error control, conservation laws, discontinuities, interior boundary condition|
|Publication:||SIAM Journal on Numerical Analysis |
51(1), 126–136. (11 pages)