Quantification of Grid Refinement Effects for NASA High Lift Trap Wing Using Error Transport Model

Uncertainty quantification methods are demonstrated on computations performed for the NASA High Lift Trap Wing near maximum lift for node-centered and cell-centered grid and solution sequences. The solution of Error Transport Equations (ETE) provides numerical error bars for the predicted surface pressure coefficients. In the case of attached flow, coarse to fine grid increments are predicted at selected spanwise stations for solutions obtained using two well established Navier-Stokes solvers. In cases where stall is observed to be grid dependent, the quantification of grid refinement effects is a notable challenge for ETE methods. An alternative approach that seeks to quantify and correlate the similarity between solution pairs in a grid refinement sequence is under development and is demonstrated. Lessons learned and suggestions for future improvements are offered.