• Shocks and discontinuities introduce difficulties in assessing code and solution accuracy
• Discontinuity position mismatch generates error-ridges in grid convergence analysis
• Glimm et al. have developed error analysis and filtering/averaging approaches for complex shock interactions
• Also of interest the generation of manufactured solutions with (unsteady) strong curved shocks: cross derivatives, entropy/vorticity gradients

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1. Glimm, J. et al. “Statistical Riemann Problems and a Composition Law for Errors in Numerical Solutions of Shock-Physics Problems”. LANL report UR-03-2921, 2003.
2. Glimm, J. & Sharp, D. H. “Prediction and the Quantification of Uncertainties”, Physica D. Vol. 133, 1999.