Aeroacoustic simulations are extremely sensitive to numerical errors. To achieve a high order of accuracy, optimized finite difference schemes, such as the well-known dispersion-relation-preservation schemes, and multiblock structured meshes are often used. Challenges appear in communicating the flow information near grid discontinuities between neighboring blocks, and sophisticated interface treatments are required. The characteristic interface condition has been successful in applications in previous publications, and yet limitations exist that are identified in the present study. This paper proposes a new interface treatment based on the analogy between finite difference and finite volume discretizations. One-sided finite difference schemes are used to calculate the spatial derivatives in the normal direction, and the residuals are reconstructed from a finite volume perspective. Applications to several benchmark cases show an encouraging improvement as compared to the previous characteristic interface treatments.
Improved Block Interface Conditions for Aeroacoustic Problems with Grid Discontinuities
AIAA Journal ; 53 , 6 ; 1531-1543
2015-04-08
13 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Improved Block Interface Conditions for Aeroacoustic Problems with Grid Discontinuities
Online Contents | 2015
|High-Order Interface for Aeroacoustic Computation Using Overset Grid (TN)
Online Contents | 2013
|