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Papers by Yuri Aguiar
Análise de parâmetros na otimização de rotas de dutos, 2018
Along with the growing necessity of improvement in the Brazilian oil and it’s derivatives transpo... more Along with the growing necessity of improvement in the Brazilian oil and it’s derivatives transport infrastructure, comes up the necessity that every pipeline project becomes more economically efficient, reducing the project’s total cost at its maximum. To achieve that, this study intends to assist the understanding the influence of some variables on the project’s total cost due to the creation of a hypothetical relief with different inclinations, aiming always to obtain the route that represents the minimum cost for every case studied through the solution of a minimum path problem using the Dijkstra’s algorithm. Has a support tool, helping to determine with the best precision the flow’s pressure loss influence on the total cost, the software Ansys CFD was used. Analyzing the results of the volumetric fraction and pipe diameter variations it could be noted that different optimum routes tendencies were observed on the different analyzed cases, the main influencer factor was the cost due the pumping of the fluids. The costs of the routes varied from 0,00374 to 0,08032 US$/m³ of fluid transported between the studied cases, raising proportionally to the volume of oil in the mixture and in an inverse relationship, decreasing with the increase of the pipe’s diameter.
The two-phase flow, in which two or more phases drain simultaneously, is present in various pheno... more The two-phase flow, in which two or more phases drain simultaneously, is present in various phenomena on the daily life of people, from a simple overflow of a refrigerant, to the blood flow in the human body, in both situations, the liquid and the gas phase flow simultaneously. In the petroleum industry, the two-phase flow is present since the moment which oil and the gas leave the reservoir, because, almost every well that produces oil, produces gas, the reciprocal is valid as well, even if the production is in small quantities. This flux of oil and gas continues on the pipes that transport that production to the separation tanks. Due the economic importance of the transportation of the production, a study it is necessary so that it occurs the correct sizing of the pipe and the pulping system involved on this transportation. The following paper consists of an analysis of an oil-gas flow behavior in horizontal pipes, and also consists of an analysis of different values of rugosity’s influence in pressure loss with a presence of a 90° junction on the pipe system. This analysis was made by the software ANSYS-CFX 13.0, and the validation of the results was made through the Lockhart-Martinelli correlation for two-phase horizontal flows adapted to 90° junctions.
Análise de parâmetros na otimização de rotas de dutos, 2018
Along with the growing necessity of improvement in the Brazilian oil and it’s derivatives transpo... more Along with the growing necessity of improvement in the Brazilian oil and it’s derivatives transport infrastructure, comes up the necessity that every pipeline project becomes more economically efficient, reducing the project’s total cost at its maximum. To achieve that, this study intends to assist the understanding the influence of some variables on the project’s total cost due to the creation of a hypothetical relief with different inclinations, aiming always to obtain the route that represents the minimum cost for every case studied through the solution of a minimum path problem using the Dijkstra’s algorithm. Has a support tool, helping to determine with the best precision the flow’s pressure loss influence on the total cost, the software Ansys CFD was used. Analyzing the results of the volumetric fraction and pipe diameter variations it could be noted that different optimum routes tendencies were observed on the different analyzed cases, the main influencer factor was the cost due the pumping of the fluids. The costs of the routes varied from 0,00374 to 0,08032 US$/m³ of fluid transported between the studied cases, raising proportionally to the volume of oil in the mixture and in an inverse relationship, decreasing with the increase of the pipe’s diameter.
The two-phase flow, in which two or more phases drain simultaneously, is present in various pheno... more The two-phase flow, in which two or more phases drain simultaneously, is present in various phenomena on the daily life of people, from a simple overflow of a refrigerant, to the blood flow in the human body, in both situations, the liquid and the gas phase flow simultaneously. In the petroleum industry, the two-phase flow is present since the moment which oil and the gas leave the reservoir, because, almost every well that produces oil, produces gas, the reciprocal is valid as well, even if the production is in small quantities. This flux of oil and gas continues on the pipes that transport that production to the separation tanks. Due the economic importance of the transportation of the production, a study it is necessary so that it occurs the correct sizing of the pipe and the pulping system involved on this transportation. The following paper consists of an analysis of an oil-gas flow behavior in horizontal pipes, and also consists of an analysis of different values of rugosity’s influence in pressure loss with a presence of a 90° junction on the pipe system. This analysis was made by the software ANSYS-CFX 13.0, and the validation of the results was made through the Lockhart-Martinelli correlation for two-phase horizontal flows adapted to 90° junctions.