A Hybrid Model Based on the Bifurcation Approach for Internal Turbulent Flow with Rotation and Streamline Curvature Effects

Resumen

This study aims to research the prediction performance of a bifurcated adaptive DDES (BADDES) model in different turbulent flows with rotation and curvature. The ??-?? k - ? model is modified by the bifurcation approach to account for the rotation and streamline curvature effects and then used as a base model to establish the BADDES model. The BADDES model was tested in rotating channel flow, Taylor-Couette flow, and swirling flow through an abrupt axisymmetric expansion. The velocity distribution of the BADDES model is slightly superior to that of other models. Additionally, the BADDES model is superior to other models at predicting RMS velocity. In addition, the URANS region of the BADDES model is thinner, meaning that the BADDES model can switch from the URANS model to the eddy simulation branch faster. The BADDES model can capture smaller-scale vortex structures than other models.