Low-Reynolds-Number k-ε Model with Elliptic Relaxation Function

摘要

The proposed turbulent model resolves the near-wall and low-Reynolds-number effects using the f_μ elliptic relaxation equation. It is wall-distance free, tensorially invariant, and frame indifferent and, hence, applicable to arbitrary topology. The anisotropic production in the dissipation equation is accounted for substantially by adding a secondary source term. The model is capable of evaluating the flow cases entangling separation and reattachment. Contrasting the predicted results with experiments demonstrates that the present model replicates fairly well the influence of wall proximity and retrieves the aspects of other models with the wall distance in the damping functions.