MODELING OF THE FLOW AROUND A SQUARE CYLINDER WITH HYBRID TURBULENCE MODELS

Abstract

The development of computing resources has played an exceptional role in the development of turbulence modeling. However, simulation of a real flow is still a significant problem if high accuracy of simulation results with low computational resources is required. Therefore, the use of hybrid models is a promising direction for solving this problem of computational fluid dynamics. When using hybrid models, modeling of near-wall flows is carried out using RANS models, while far from the wall, LES models are used. In this work, we used the k - ω SST and DDES models. The aim of the work is to identify a suitable turbulence model that could give accurate and reliable results for practical engineering applications. To evaluate the model used in this work, the problem of modeling the air flow around a square cylinder is considered. Comparison of the results of numerical calculations with the corresponding experimental data shows that the use of the hybrid k - ω SST()-DDES model is promising.