理性亚格子建模的实践与反思

Subgrid-scale modeling is spirit of large-eddy simulation. Original intention of rational subgrid-scale modeling is to remove empirical and phenomenological components of modeling process, so that every step in modeling process is physically and mathematically traceable. According to theory of rational subgrid modeling, we developed a series of subgrid models that do not depend on empirical constants and phenomenological models, but their effect in practical problems is still insufficient, which leads to, in recent years, reflection on proper idea of subgrid modeling. This paper reviews existing research and new progress, whose goal is to give a rational and self-consistent theoretical guidance of future large eddy simulation.