Modelagem e simulação do escoamento em um Venturi

Abstract

The main objective in this work is the behavior analysis of a turbulent flow in a Venturi. The Venturi used had circular cross section, the turbulent flow was considered steady and the fluid flow inside the Venturi is water, incompressible. In order to analyze the characteristics of a flow in a Venturi, two approaches were made: computational and experimental, and the first approach is the research focus. The data experimentally acquired has used in the computational model validation; in addition, it allows the boundary conditions determination. The computational model has developed with the version 14.5 of Ansys/Fluent, Computational Fluid Dynamics (CFD) software that simulates turbulent flows using the Reynolds Averaged NavierStokes (RANS) equations, among others techniques. The turbulence model k-epsilon was used for resolution of the RANS equations, that model is used widely for simulate turbulence flows, which has similar characteristics to those found in that paper. On the simulations undertaken, were investigated the pressure and velocity distribution field, as well as other properties related with the turbulence presents in the computational modeling. Vortices and changing of the velocity vectors directions in the flow has observed on the analysis by computational model, the results were confronted against experimental data and presents convergence. That analysis allowed a better understanding of the phenomena involved on flow in Venturi.