In practical fluid computation with structured grid around complex geometry, singular points with metric discontinuity can be frequently found. Generally, the grid singularities may cause severe numerical oscillations when some high-order finite difference method (FDM) is employed. Recently, in order to solve this problem, high-order multi-block computation technique with characteristic interface conditions (CIC) were proposed. In the previous study, the authors extended the functions of the CIC, and newly derived the generalized characteristic interface conditions (GCIC). Resultantly, numerical flexibility and robustness of the multi-block interface treatment can be further improved from a practical point of view. In this article, as a preliminary study, the GCIC are applied to multi-block large eddy simulation (LES) around complex geometry, and their practical extensibility is shown and discussed.
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