Evaluation of Turbulence Models for Incompressible Flow in a Venturi Tube

Tolentino S.L.; Mírez J.; González O. · FME Transactions (2024) · DOI: 10.5937/fme2404534t

Resumen

Turbulence models are semi-empirical transport equations that model flow behavior. They are compared on a recurring basis to know which of them presents the best fit with experimental data for different laboratory equipment. In the present work, the incompressible flow field (water) is simulated with the computational fluid dynamics (CFD) tool and RANS model for the geometry of a Venturi tube in 2D computational domains, with the objective of evaluating six turbulence models: standard k-ε, RNG k-ε, standard k-ω, SST k-ω, RSM and SA. The numerical results of the trajectories of the pressure pattern curves at the walls and axial symmetry are close to each other. Pressure drops occur at the throat. The percentage errors of the turbulence models increase as the magnitude of the pressure ratio increases, for rp=1.0932, rp=1.1118, rp=1.1377, and rp=1.1531. It is concluded that the SA turbulence model of Spalart-Allmaras (1992) best fits the experimental pressure data, with percentage errors of less than 10%. © (2024), (Belgrade University). All rights reserved.

Instituciones: Universidad Nacional de Ingeniería; Universidad Nacional Hermilio Valdizán