Numerical simulation of steady fluid flow in a vortex diode

The article is devoted to the selection of modeling parameters when conducting a numerical study of fluid flow in the flow part of a vortex fluidic diode. The fluid flow in a vortex diode is complex, including flat and volume vortices. Therefore, the correct choice of modeling parameters when conducting a numerical experiment is difficult. A review of scientific and technical literature has shown that there is currently no unified approach to numerical modeling of flows in a vortex diode. In this paper, a numerical modeling of fluid flow in the forward and reverse directions of a vortex fluidic diode is carried out using the parameters identified during the literature review as the most frequently used in vortex diode studies. Thus, k-ε, SST, RSM and the laminar model are used as turbulence models. The modeling results and their analysis are presented. In addition, a physical experiment was conducted during the work, the purpose of which was to obtain the actual characteristics of the vortex diode under study. To check the adequacy of the numerical simulation results using various turbulence models and a laminar model, a comparison of the results of a physical experiment and the results of numerical simulation was carried out. In this case, the comparison was made using integrated parameters. It has been established that in the studied range of Reynolds numbers the most preferable from the point of view of the accuracy of the obtained results of flow modeling in a vortex diode is the RSM turbulence model for flow modeling in the forward and reverse directions. At the same time, the SST model, due to lower resource requirements in comparison with the RSM and relatively high accuracy of flow modeling in vortex diodes at high Reynolds numbers, can be used in modeling for preliminary calculations of a vortex diode.