SIMULATION OF SWIRLING FLOWS BASED ON MODIFIED TWO-FLUID TURBULENCE MODEL

This article proposes a modified version of the previously known two-fluid model. To verify the modified two-fluid model, a study was conducted of a swirling jet emerging into a flooded space from a long pipe rotating around its axis. This task is difficult to solve using various turbulence models because turbulence anisotropy arises in it. Therefore, many RANS models for such problems do not give satisfactory results. The article presents the numerical results of the new model both for the flow inside a rotating pipe and for a free jet. The results obtained are compared with known experimental data, and with the results of the RSM model. Comparisons show that the proposed new model has high accuracy. In addition, the numerical implementation showed that it has good stability and convergence.