Estudo numérico do escoamento bifásico de água e óleo em conexões tê na presença de vazamento.

Abstract

From the large number of accidents involving pipelines in the oil industry, many researcher have the objective of improving the tecnologies of leak detection, where the knowledge of the behavior (s) fluid (s) inside the pipe is necessary. The work aims to describe the thermofluid dynamics study of oil-water flow in a pipe with tee junction and with the presence of leakage. For this, a three-dimensional domain was built and it was simulated the nonisothermal flow of water by testing models of turbulence k-Ɛ standard, SST e RNG k-Ɛ, using the equations of conservation of mass, momentum and energy. Comparing the profiles of velocity and temperature with experimental data, it were observed that the k-Ɛ standard model well represented the flow pattern behavior satisfactorily. The water-oil two-phase flow in a tee junction with leakage was simulated, varying the volume fraction of oil mixtures and temperatures of the input sections. It was noted that the smaller the volume fraction of oil in the flow, the greater the pressure upstream of the leak and the region where the main duct is linked to the secondary duct showed higher pressure gradients.