TY - JOUR T1 - AUSM-Based High-Order Solution for Euler Equations AU - Angelo L. Scandaliato & Meng-Sing Liou JO - Communications in Computational Physics VL - 4 SP - 1096 EP - 1120 PY - 2012 DA - 2012/12 SN - 12 DO - http://doi.org/10.4208/cicp.250311.081211a UR - https://global-sci.org/intro/article_detail/cicp/7326.html KW - AB -

In this paper we demonstrate the accuracy and robustness of combining the advection upwind splitting method (AUSM), specifically AUSM+-UP [9], with high-order upwind-biased interpolation procedures, the weighted essentially non-oscillatory (WENO-JS) scheme [8] and its variations [2, 7], and the monotonicity preserving (MP) scheme [16], for solving the Euler equations. MP is found to be more effective than the three WENO variations studied. AUSM+-UP is also shown to be free of the so-called "carbuncle" phenomenon with the high-order interpolation. The characteristic variables are preferred for interpolation after comparing the results using primitive and conservative variables, even though they require additional matrix-vector operations. Results using the Roe flux with an entropy fix and the Lax-Friedrichs approximate Riemann solvers are also included for comparison. In addition, four reflective boundary condition implementations are compared for their effects on residual convergence and solution accuracy. Finally, a measure for quantifying the efficiency of obtaining high order solutions is proposed; the measure reveals that a maximum return is reached after which no improvement in accuracy is possible for a given grid size.