Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 6 of 6 for “"Escoamento multifásico"”.
-
Uma equação para o cálculo do atrito entre fases em escoamentos turbulentos estratificados em tubulações circulares
Multiphase flows are present in several areas of the industry. Modeling these types of flow are, therefore, imperative to engineering. In literature, there are several methods to calculate friction pressure losses in such processes. These methods involve friction factors, parameters that depend on …
-
Análise experimental do efeito do ângulo de injeção de gás em um escoamento vertical ascendente de líquido
Evaluates the effect of the gas injection angle in a upward vertical liquid flow, regarding the bubble size and shape distributions, as well as liquid velocity profile, both in the injection area. The experiments are carried in a 44 mm acrylic vertical pipe, in which water flows and air is injected …
-
Resposta dinâmica e estabilidade de tubos com escoamento interno
In this work, a finite element model is developed to analyze: linear and non-linear transient response and free vibrations problems and dynamic stability of pipes conveying fluid. Making use of an updated lagrangian formulation for the principle of virtual work the incremental equations of motion …
-
Projeto térmico de trocadores de calor resfriados a ar
The scarcity and the treatment costs of the water cooling, in the petroleum and petrochemical industries, are increasing the use of the air cooled heat exchangers. Exchangers designing usualy utilize the estimate and global methods. This paper shows these methods and presents a new approach for …
-
Um modelo constitutivo para o escoamento através de um arranjo de barras de seção circular
The determination of the flow through a uniform array of rod bundle is made by means of the Continuum Theories of Mixtures, which gives balance equations for the system. The hypotheses of isothermal and fully developed turbulent flow are made. Constitutive equations for the resistive force are …
-
Formulações de elementos finitos bi e tridimensionais para simulação em paralelo de escoamentos em reservatórios de petróleo
Finite element formulations oriented to distributed memory parallel machines are proposed and analized to simulate incompressible miscible flow in porous media with applicationto petroleum reservoir engineering. The mathematical model consists in a system of a partial differential equations given …