关键词: 湍流模拟, 非惯性系, 扩展内禀旋转张量, 代数雷诺应力张量

Abstract: We investigate the role of extended intrinsic mean spin tensor introduced in this work for turbulence modelling in a non-inertial frame of reference. It is described by the Euclidean group of transformations and, in particular, its significance and importance in the approach of the algebraic Reynolds stress modelling, such as in a nonlinear K_-ε model. To this end and for illustration of the effect of extended intrinsic spin tensor on turbulence modelling, we examine several recently developed nonlinear K_-ε models and compare their performance in predicting the homogeneous turbulent shear flow in a rotating frame of reference with LES data. Our results and analysis indicate that, only if the deficiencies of these models and the like be well understood and properly corrected, may in the near future, more sophisticated nonlinear K_-ε models be developed to better predict complex turbulent flows in a
non-inertial frame of reference.

Key words: frame-dependent, algebraic Reynolds stress models, turbulence modelling, non-inertial frame of reference, extended intrinsic mean spin tensor