ISSN (e): 2250 – 3005 || Volume, 06 || Issue, 02 ||February – 2016 || International Journal of Computational Engineering Research (IJCER) www.ijceronline.com Open Access Journal Page 6 Simulation of the Hydrodynamic Conditions of a Rotating Cage for Evaluating Corrosion Inhibitors. Yolitzin Alvarado Medina 1 , Sergio Serna Barquera 2 , Juan Carlos García Castrejón 2 , R. J. Romero 2,* 1 Posgrado en Ingeniería y Ciencias Aplicadas, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Chamilpa (62209), Cuernavaca, Morelos 2 Centro de Investigación en Ingeniería y Ciencias Aplicadas, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Chamilpa (62209), Cuernavaca, Morelos I. INTRODUCTION Corrosion may be defined as a destructive process that causes a deterioration of the material, as the result of a chemical attack caused by the environment. Corrosion, it occurs primarily in metals, therefore, a major problem is that the corrosion affects primarily these kind of items. This implies many types of problems, most of which are quite serious. This process in its various forms (among which may be present) will produce a considerable deterioration in the kinds of metals that affects them over time. If not treated, inducing complete destruction, implying also huge economic and production losses. For example: the costs caused by corrosion oscillate around 4% of GDP industrialized countries (the science and technology sector is only 0.47% of GDP compared to Mexico). Many of these costs could be avoided with more and better use of knowledge and techniques that are available today (2,3). II. METHODOLOGY A process of computer simulation was used to simulate the flow in pipelines in the laboratory samples by rotating ducts materials (steel) at different speeds. In doing rotate both being simulated corroded pipeline as it passes through a corrosive liquid with different inhibitors. Rotating cage geometry: To enter the simulation program geometry rotating cage is programmed into the software ICEM. In ICEM "draw" geometry and "meshing" was determined, as well defined boundary conditions. The geometry is drawn in 3D arrays 8, 4 and 2 flat test to determine the effects of the corrosion on the surfaces of the coupons. To determine a representative velocity profile of the fluid level, thus is reduced 2D geometry it identified. Each 2D geometries must have a mesh to be simulated in the software ANSYS FLUENT [4]. For each of the arrangements made with mesh boundary layer growth factor, this allows the calculation of the value to be right on the walls of the coupons. ANSYS FLUENT simulation: It made a total of 18 computer-assisted simulations, with arrangements of 2, 4 and 8 coupons with a time simulation of 4000 seconds, 20,000 iterations and each iteration with a time step of 0.2 (s). The conditions are calculated velocity profiles at standard temperature and solution viscosity of 1.0 cp and 1.5 cp. The density is 998 kg/m 3 and 3 angular velocities have been considered: 920 rpm, 460 rpm and 230 rpm for the calculations. Abstract The Rotating cage technique is used to evaluate corrosion inhibitors. The rotating cage holds 8 coupons containing corrosive liquid, which rotate within it. These coupons have a dynamic that simulates the conditions in a pipe through a corrosive fluid, in this case the material used in pipelines are analyzed oil. A study of the fluid dynamics through the ANSYS software shows that the velocity fields, contours, vectors and speed profiles for symmetric geometries arrangements 2, 4 and 8 embedded specimens with a corrosion inhibitor. The conditions are calculated velocity profiles are standard temperature and solution viscosity of 1.0 cp and 1.5 cp. The density is considered constant of 998 kg / m3 and three angular velocities (920, 460 and 230 rpm) were analyzed. Finally the results of these conditions have been analyzed, yielding values close to zero in the outside walls of the cylinder. The cylinder contain the coupons rotating speeds to ensure turbulence (1) and to analyze the rate of corrosion inhibitor.