scholarly journals Hydrodynamic Study of Oil Leakage in Pipeline via CFD

2014 ◽  
Vol 6 ◽  
pp. 170178 ◽  
Author(s):  
Morgana de Vasconcellos Araújo ◽  
Severino Rodrigues de Farias Neto ◽  
Antonio Gilson Barbosa de Lima ◽  
Flávia Daylane Tavares de Luna
Keyword(s):  
Oil And Gas ◽  
Three Dimensional ◽  
Oil And Gas Industry ◽  
Transient Pressure ◽  
Pipe Length ◽  
Gas Industry ◽  
Efficient Detection ◽  
Ansys Cfx ◽  
Oil Flow ◽  
Dynamics Simulations

This paper describes the transient dynamics behavior of oil flow in a pipe with the presence of one or two leaks through fluid dynamics simulations using the Ansys CFX commercial software. The pipe section is three-dimensional with a pipe length of 10 m, a pipe diameter of 20 cm, and leak diameter of 1.6 mm. The interest of this work is to evaluate the influence of the flow velocity, and the number and position of leaks on the transient pressure behavior. These new data may provide support for more efficient detection systems. Thus, this work intends to contribute to the development of tools of operations in oil and gas industry.

Influence of oil leakage in the pressure and flow rate behaviors in pipeline

2017 ◽  
Vol 4 (1) ◽  
pp. 17-29 ◽  
Author(s):  
Carolina Andrade De Sousa ◽  
Oldrich Joel Romero
Keyword(s):  
Single Phase ◽  
Oil And Gas ◽  
Oil Industry ◽  
Oil And Gas Industry ◽  
Single Phase Flow ◽  
Ansys Fluent ◽  
Gas Industry ◽  
Oil Flow ◽  
Dynamics Simulations ◽  
Mathematical And Numerical Modeling

Pipelines are highly used in the oil industry for the transportation of oil, natural gas and products from refineries. One of the main areas of study in pipeline engineering is the flow guarantee. This paper describes the steady state dynamics behavior of oil flow in a pipeline with the presence of a leak. The mathematical and numerical modeling of a single-phase flow in a one meter pipeline with a diameter of 0.15 m in an onshore environment. Three different sizes of leaks are studied based on fluid dynamics simulations using the ANSYS FLUENT® 15.0 commercial software. The interest of this paper is to evaluate the influence of leakage on the pressure, velocity fields and flow rates in a 3D section of pipe in order to identify the influence of the perturbation in these parameters. The results obtained is interpreted in the CFD- Post that is included in the software package. Thus, this work intends to contribute to the development of operations tools in oil and gas industry.

Three-Dimensional Multibody Tracked Vehicle Modeling and Simulation

2003 ◽  
Author(s):  
Corina Sandu ◽  
Jeffrey S. Freeman
Keyword(s):  
Oil And Gas ◽  
Three Dimensional ◽  
Oil And Gas Industry ◽  
Vehicle Model ◽  
Road Vehicles ◽  
Gas Industry ◽  
Tracked Vehicles ◽  
Applied Forces ◽  
The Military ◽  
Recursive Dynamics

Off-road vehicles have broad areas of application (in agriculture, in the construction industry, in the transport industry, in the military, in the U.S. space programs, in the oil and gas industry). A large segment of the off-road vehicles is made up by the tracked vehicles. The purpose of this study is to develop and implement an independent vehicle model. The vehicle model is general, in the sense that it is not restricted to a specific vehicle; it can model vehicles with varying numbers of road wheels, or different suspension characteristics It can be used, together with a track model, to analyze several types of tracked vehicles. A recursive dynamics formulation approach is used to model the vehicle. All the computations are performed in relative coordinates. The kinematic formulation of the model is presented, as well as the dynamic analysis, including the external and the internal applied forces. Dynamic settling simulations of the vehicle model on several types of soil are presented. The vehicle model presented in this study serves as a support, to help testing and comparing different track models and track-terrain interaction formulations.

CFD for Multiphase Flow Transport in Pipelines

2011 ◽  
Author(s):  
M. Ramdin ◽  
R. A. W. M. Henkes
Keyword(s):  
Surface Tension ◽  
Multiphase Flow ◽  
Oil And Gas ◽  
Three Dimensional ◽  
Oil And Gas Industry ◽  
Bubble Velocity ◽  
Multiphase Model ◽  
Gas Industry ◽  
Flow Transport ◽  
Numerical Grid

There is an increasing interest in applying three-dimensional Computational Fluid Dynamics (CFD) for multiphase flow transport in pipelines, e.g. in the oil and gas industry. In this study the Volume of Fluid (VOF) multiphase model in the commercial CFD code FLUENT was used to benchmark the capabilities. Two basic flow structures, namely the Benjamin bubble and the Taylor bubble, are considered. These two structures are closely related to the slug flow regime, which is a common flow pattern encountered in multiphase transport pipelines. After non-dimensionalization, the scaled bubble velocity (Froude number) is only dependent on the Reynolds number and on the Eo¨tvo¨s number, which represent the effect of viscosity and surface tension, respectively. Simulations were made for a range of Reynolds numbers and Eo¨tvo¨s numbers (including the limits of vanishing viscosity and surface tension), and the results were compared with existing experiments and analytical expressions. Overall there is very good agreement. An exception is the simulation for the 2D Benjamin bubble at low Eo¨tvo¨s number (i.e. large surface tension effect) which deviates from the experiments, even at a refined numerical grid.

scholarly journals Validation of transient time method to calibrate oil flow meters in closed conduits using 123I as the radiotracer

Nukleonika ◽  
2021 ◽  
Vol 66 (2) ◽  
pp. 69-74
Author(s):  
Eduardo R. Gonçalves ◽  
Luís E. B. Brandão ◽  
Delson Braz
Keyword(s):  
Aqueous Medium ◽  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Flow Profile ◽  
Transient Time ◽  
Gas Industry ◽  
Flow Meters ◽  
Industrial Plants ◽  
Oil Flow ◽  
Scintillator Detectors

Abstract To assure the credibility of commodity transfer operations in the oil and gas industry, calibrated flow meters are used to quantify the movement of fluids in the pipelines. The purpose of this paper is to validate the transient time method (TTM) to calibrate oil flow meters installed in restricted areas, using the 123I-labelled oil as a radiotracer. Traditionally, as proposed by the standard ISO 2975-7:1977 [1] for experiments in an aqueous medium, the TTM is employed by positioning two detectors at separate locations. However, in industrial plants, it is not always possible to install detectors at the distances recommended by the ISO 2975-7. The method proposed in this paper uses four scintillator detectors separated one from each other by 0.30 m and three injections containing 5.0 ml of 123I-labelled oil. The experiments were carried out in an oil flow rig with a turbulent flow profile. The results have reached an uncertainty which is lower than 1.0%.

Modelling of Hot Surface Ignition Within Gas Turbines Subject to Flammable Gas in the Intake

2017 ◽  
Author(s):  
Lea Duedahl Pedersen ◽  
Kenny Krogh Nielsen ◽  
Chungen Yin ◽  
Henrik Sørensen ◽  
Ingar Fossan
Keyword(s):  
Gas Turbines ◽  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Initial Mixture ◽  
Gas Industry ◽  
Hot Surface Ignition ◽  
Surface Ignition ◽  
Ansys Cfx ◽  
Computational Fluid Dynamics Cfd ◽  
Hot Surface

Controlling risks associated with fires and explosions from leaks of flammable fluids at oil and gas facilities is paramount to ensuring safe operations. The gas turbine is a significant potential source of ignition; however, the residual risk is still not adequately understood. A model has been successfully developed and implemented in the commercial Computational Fluid Dynamics (CFD) code ANSYS CFX. This model is based on a combination of standard models, User Defined Functions (UDFs) and the CFX Expression Language (CEL). Prediction of ignition is based on a set of criteria to be fulfilled while complex kinetics is handled computationally easy by means of a reaction progress variable. The simulation results show a good agreement with the trends experimentally observed in other studies. It is found that the hot surface ignition temperature (HSIT) increases with increase in velocity and turbulence but decreases with increase in initial mixture temperature and pressure. The model shows a great potential in reliable prediction of the risk of hot surface ignition within gas turbines in the oil and gas industry. In the future, a dedicated experimental study will be performed not only to improve the understanding of the risk of hot surface ignition but also to collect experimental data under well-defined conditions to further validate or refine the model.

Deployment of Digital NDT Solutions in the Oil and Gas Industry

2020 ◽  
Vol 78 (7) ◽  
pp. 861-868
Author(s):  
Casper Wassink ◽  
Marc Grenier ◽  
Oliver Roy ◽  
Neil Pearson
Keyword(s):  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Gas Industry

What Does Rent Give to Federal Budget (on the Russia's Budget Dependence upon "Oil Dollars")

2004 ◽  
pp. 51-69 ◽  
Author(s):  
E. Sharipova ◽  
I. Tcherkashin
Keyword(s):  
Oil And Gas ◽  
Strong Dependence ◽  
Oil Prices ◽  
Federal Budget ◽  
Oil And Gas Industry ◽  
Gas Industry ◽  
Resource Rent ◽  
Tax Legislation ◽  
Russian Economy ◽  
The Government

Federal tax revenues from the main sectors of the Russian economy after the 1998 crisis are examined in the article. Authors present the structure of revenues from these sectors by main taxes for 1999-2003 and prospects for 2004. Emphasis is given to an increasing dependence of budget on revenues from oil and gas industries. The share of proceeds from these sectors has reached 1/3 of total federal revenues. To explain this fact world oil prices dynamics and changes in tax legislation in Russia are considered. Empirical results show strong dependence of budget revenues on oil prices. The analysis of changes in tax legislation in oil and gas industry shows that the government has managed to redistribute resource rent in favor of the state.

The Political Economy of Power: Approaches to the Analysis of Relationships between the State and Business in Russia

2011 ◽  
pp. 19-33
Author(s):  
A. Oleinik
Keyword(s):  
Oil And Gas ◽  
Road Construction ◽  
Oil And Gas Industry ◽  
Retail Trade ◽  
Business Community ◽  
The Political ◽  
Economic Power ◽  
Gas Industry ◽  
The Road ◽  
Ruling Elites

The article deals with the issues of political and economic power as well as their constellation on the market. The theory of public choice and the theory of public contract are confronted with an approach centered on the power triad. If structured in the power triad, interactions among states representatives, businesses with structural advantages and businesses without structural advantages allow capturing administrative rents. The political power of the ruling elites coexists with economic power of certain members of the business community. The situation in the oil and gas industry, the retail trade and the road construction and operation industry in Russia illustrates key moments in the proposed analysis.

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