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This chapter provides a detailed analysis of the inherent limitations in traditional Very Large Eddy Simulation (VLES) methods. To address these issues, a targeted improvement strategy is proposed, incorporating a novel filtering scale function and a boundary layer protection function. These advancements aim to mitigate grid-induced separation and modeled stress depletion phenomena. By enabling accurate delineation between Reynolds-Averaged Navier-Stokes (RANS) and Large Eddy Simulation (LES) regions while reducing grid-scale sensitivity, the enhanced approach significantly improves the VLES method’s predictive accuracy for fully turbulent separated flows.

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The Development and Enhancement of the Very Large Eddy Simulation Method

  • 章节

  • 发表日期：

    2025年

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  • Jiakuan Xu,
  • Min Chang,
  • Junqiang Bai

摘要

This chapter provides a detailed analysis of the inherent limitations in traditional Very Large Eddy Simulation (VLES) methods. To address these issues, a targeted improvement strategy is proposed, incorporating a novel filtering scale function and a boundary layer protection function. These advancements aim to mitigate grid-induced separation and modeled stress depletion phenomena. By enabling accurate delineation between Reynolds-Averaged Navier-Stokes (RANS) and Large Eddy Simulation (LES) regions while reducing grid-scale sensitivity, the enhanced approach significantly improves the VLES method’s predictive accuracy for fully turbulent separated flows.