Papers by Joel Ballesteros Romero
Latin American Journal of Energy Research, 2017
Pipelines are highly used in the oil industry for the transportation of oil, natural gas and prod... more 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.
SPE Heavy Oil Conference and Exhibition, 2011
AIChE Journal, 2007
Many different products are manufactured by depositing a thin liquid layer onto a moving substrat... more Many different products are manufactured by depositing a thin liquid layer onto a moving substrate and subsequently solidifying it. Examples of products include premium papers, magnetic tapes and disks, printing materials, photosensitive coatings, membranes, films used in different types of displays, microelectronics circuits and many others. The region where the liquid first comes into contact with the substrate is called the coating bead.. It is usually bounded by two gas-liquid interfaces, or menisci, the solid walls of the coating applicator and the moving substrate. The competition among viscous, capillary and pressure forces, and in some cases inertial and elastic forces, sets the range of operating parameters at which the viscous free surface flow can be two-dimensional and steady-the conditions prerequisite for uniform coating. Coating technology remained an art until the 1940's. Since then, rigorous mathematical analysis of viscous free surface flows started to be used to gain basic understanding of coating flows. Today, both industrial and academic coating flow research are based on comprehensive theoretical and experimental analysis. Theoretical analysis usually require advanced numerical methods to solve the mass and momentum conservation equations coupled with the appropriate boundary conditions for flows with gas-liquid interfaces. Most of the theoretical analysis can provide details and insights into the physics that control the two-dimensional flow in successful coating operations, stability limits of the flow states and, ultimately, stability limit maps of the process. However, the available theoretical models for coating flow analysis are not able to precisely describe some essential physical mechanisms, such as dynamic wetting and non-Newtonian behavior. Specially in these cases, it is essential to be able to compare the predicted flow states with experimental measurements of the flow field in order to validate the simplifying assumptions and to test the constitutive equations used to describe the mechanical behavior of the flowing liquid.
AIChE Journal, 2006
ABSTRACT Coating die edges are not mathematical corners, they are rounded. Contact lines do not a... more ABSTRACT Coating die edges are not mathematical corners, they are rounded. Contact lines do not actually pin. The effects of the radius of curvature of the downstream edge of slot dies on contact line location, effective contact angle, and low-flow limit—air-fingers penetrating from downstream and breaking apart the coating-bead—are examined by solving the Navier-Stokes system for Newtonian flow. The geometry of the die surface is represented by two straight lines and an arc of circle connecting them. The local contact angle is treated as a specified equilibrium value. The system of equations is solved by Galerkin's method and finite element basis functions. The results show how the edge rounding affects the contact line position and stability of the flow, and indicate the minimum radius of curvature necessary to apparently pin the contact line. © 2005 American Institute of Chemical Engineers AIChE J, 2006
Uploads
Papers by Joel Ballesteros Romero