Análise numérica e experimental do escoamento em torno de cilindros de base triangular empregados em medidores de vazão do tipo vortex

Abstract

After the bibliographic research about the swirling of the swirling structures and numerical calculations, a model of a triangular cylinder subjected to an external flow is develloped in order to study the functionnal principle of a vortex flow meter. Firstly the numerical method by software OpenFOAM obtaining a solution of both steady state and time dependent solution of the model. The data found were used to obtain the main parameters, such as the eddies shedding frequency and the corresponding Strouhal Number, in which it presented a discrepancy of only 0.6%. The develloped model based on the Finite Volume Method (FVM) was compared with an equivalent experimental model. Similar results were obtained in both methods. Thus, both methods demonstrated to be appropriate to evaluate problems of this nature.