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element simulation » element formulation (Expander búsqueda), event simulation (Expander búsqueda), patient simulation (Expander búsqueda)
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element simulation » element formulation (Expander búsqueda), event simulation (Expander búsqueda), patient simulation (Expander búsqueda)
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1
artículo
Publicado 2019
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The performance of discrete element method (DEM) simulations is highly dependent on the requirements of the associated algorithms in terms of computer memory usage and CPU time. In particular, computer CPU time heavily depends on the identification of neighbor particles and the computation of particle-particle interactions. Over the years several neighbor particles searching methods have been developed. Accordingly, in this work the performance of two of well-known searching methods, linked cell and Verlet tables algorithms, are assessed in the context of the development of a new DEM-based tool. More specifically, the neighbor searching methods performance and related computational costs are parametrically analyzed and an assessment of their suitability for carrying the intended numerical simulations is provided. The referred numerical simulations are performed accounting for a canonical...
2
artículo
Publicado 1998
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Thermodynamic simulation models have been developed to observe the behavior of the minor elements Zn, Pb, As, Sb and Bi; as well as the major elements Cu, Fe, Si, 0 and S in the conversion and fusion processes: NORANDA and ISASMELT for the production of copper-rich mattes. The Noranda process shows a steady state model for obtaining a high-grade matte in metallic copper. The lsasmelt process is based on the concept of the two independent reaction sites in the bath (slag-killing interface): rapid oxidation and slow reduction. The heat balance of the process and the distribution thermodynamics of the minor elements are united and expressed in terms of the process variables such as temperature, enriched 02, composition of the charge, degree of matte and content of the magnetite in the Slag and other variables are incorporated into the modeling, which can predict the operating effects of che...
3
artículo
Publicado 1998
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Thermodynamic simulation models have been developed to observe the behavior of the minor elements Zn, Pb, As, Sb and Bi; as well as the major elements Cu, Fe, Si, 0 and S in the conversion and fusion processes: NORANDA and ISASMELT for the production of copper-rich mattes. The Noranda process shows a steady state model for obtaining a high-grade matte in metallic copper. The lsasmelt process is based on the concept of the two independent reaction sites in the bath (slag-killing interface): rapid oxidation and slow reduction. The heat balance of the process and the distribution thermodynamics of the minor elements are united and expressed in terms of the process variables such as temperature, enriched 02, composition of the charge, degree of matte and content of the magnetite in the Slag and other variables are incorporated into the modeling, which can predict the operating effects of che...
4
artículo
Publicado 2020
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The implementation of any software development process involves the consumption of critical resources. Software engineers cannot experiment with different development processes before starting them in real projects, due to the time that would entail and the amount of elements that are involved, so it is vital to have tools that allow the pre-visualization of the results of executing the software development process and how the environmental variables affect it, thus being able to anticipate under what conditions the software development process will be deployed. This paper presents the modelling and simulation of a software development process using System Dynamics (SD), which allows the graphical representation of the elements intervening in the software process, and the incorporation of as many relevant elements as possible. As a software costs estimation reference, the COCOMO estimati...
5
artículo
Publicado 2025
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This work focused on proposing a plan for improvement and control of the customer service process in a customer service center, based on a waiting line analysis where it describes all the elements that interact in the system and a statistical analysis of processes to define the state in which it operates. Subsequently, the simulation of processes is applied to represent the system studied, and with it, to be able to evaluate different strategies for improvement and increase in productivity. The following strategies were evaluated: correction of the instability of customer service processes
6
artículo
Publicado 2025
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Para estimar el impacto de los terremotos en áreas urbanas, los investigadores convencionalmente utilizan modelos simplificados de estructuras urbanas para simulaciones. Sin embargo, los avances recientes en tecnología ahora permiten predicciones de respuesta ante terremotos más precisas a través de modelos de alta fidelidad y gemelos digitales. Los programas convencionales de generación de mallas pueden producir modelos 3D generales, pero no están optimizados para simulaciones urbanas a gran escala, donde el refinamiento de la malla cerca de las interfaces de los materiales es esencial. En este estudio, desarrollamos un método eficiente basado en la triangulación de Delaunay para simulaciones a escala urbana mediante la partición del modelo 3D en subdominios. El método propuesto utiliza de manera integrada la información del modelo de elevación digital y del modelo de veloci...
7
artículo
For the best performance and longer duration of devices or elements that participate in a mechanical energy transport system, they require an adequate lubrication process in the areas exposed to friction: bearings, gears, cylinder-piston, etc. This process is very important for the optimal functioning of the system, since it reduces repair costs and unscheduled failures. One of the frequent problems of poor lubrication is generated by the Cavitation phenomenon, for this reason it is important to study its effects under operating conditions. In the present work, the formulation and numerical simulation of Cavitation in bearings is carried out, considering the variation of the viscosity of the lubricant in relation to the pressure and the distribution space. In other works carried out on this phenomenon, it is mentioned how complex it would be to develop a numerical process in a two-dimens...
8
artículo
Publicado 2025
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Background and Objective: A previous study investigated the in vitro release of methylene blue (MB), a widely used cationic dye in biomedical applications, from nanocellulose/nanoporous silicon (NC/nPSi) composites under conditions simulating body fluids. The results showed that MB release rates varied significantly with the nPSi concentration in the composite, highlighting its potential for controlled drug delivery. To further analyze the relationship between diffusion dynamics and the MB concentration, this study developed a finite element (FE) method to solve Fick’s equations governing the drug delivery system. Methods: Release profiles of MB from NC/nPSi composites with varying nPSi concentrations (0%, 0.1%, 0.5%, and 1.0%) were experimentally measured in triplicate using phosphate-buffered saline (PBS) at 37 °C, pH 7.4, and 100 rpm. Mathematical models incorporating linear and q...
9
artículo
Publicado 2024
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Tailings dams are complex geotechnical structures that require a thorough analysis of their stability. The traditional method for assessing stability, the Limit Equilibrium Method (LEM), focuses on calculating the factor of safety (FS), but omits critical aspects such as the stress distribution along the regrowth process. The finite element method (FEM), based on the strength reduction technique (SSR), is an alternative that allows calculating the FS and understanding the real behavior of the slope, by analysing stresses along the different raises stage. In this study, the FEM method was used to simulate the Ancash tailings dam, Peru. The simulation allowed obtaining detailed information on the stress states to which the soil foundation is subjected at each stage of regrowth. The results obtained in terms of displacements and stresses provided a more accurate understanding of the failure...
10
artículo
The authors would like to thank to FONDECYT-UK J008-2016 for the financial support during the course of this work.
11
artículo
Publicado 2022
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The geometallurgical model is a tool that allows evaluating the necessity of mineral deposits from the geological, processing and production point of view. With this, it is possible to estimate the most realistic net present value and significantly reduce the technical-operational risk that occurs in the feasibility stages of a mining project. In the present investigation, an exhaustive search has been carried out on studies focused on geometallurgical modeling in porphyry copper deposits in which it has been estimated and simulated as geometallurgical total copper grade, oxide copper, penalizing elements, metallurgical recovery, bond work index and of abrasion. Through this research, it is evident that by incorporating geometallurgical attributes in the estimation of mineral resources, it is possible to better quantify the spatial variability of the deposit, anticipate those minerals th...
12
artículo
Publicado 2024
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Companies engaged in mining vehicle rental face challenges in adequately inspecting the condition of suspension springs due to time constraints. To address this issue and monitor the suspension of Toyota Hilux trucks before and after rental service, we propose a prototype development of an autonomous robot. The robot utilizes a SLAM-based navigation system to reach specified positions, while a robot arm control system positions a camera for inspecting spring suspension profiles. We studied the vehicle and robot arm position control systems, conducted dynamic simulations of the robot arm, designed the robot system architecture using ROS, simulated the robot using ROS Gazebo, and developed an algorithm to generate a technical inspection report with registered spring photographs. Navigation is facilitated by an A1M8 Lidar sensor. Data processing is performed using a Raspberry Pi 4B 8 GB wit...
13
artículo
Publicado 2018
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DR & MR Comunicaciones y Servicios LTDA. es una organización enfocada a realizar proyectos que tienen como principal objetivo la instalación de fibra óptica y sus equipos correspondientes; la empresa está encargada desde el diseño, planeación y presupuesto hasta la construcción de cada proyecto; los cuales se desarrollan en ciudades fuera de Bogotá; Causando así que la empresa deba estar tener pendiente sobrecostos en la operación por traslados y viáticos que necesita cada técnico para el desarrollo de un proyecto. Partiendo de los retos logísticos y sobrecostos previamente mencionados el siguiente documento plantea un modelo que permite a la empresa DR&MR definir la asignación de recursos a usar en cada uno de sus proyectos, mientras maximiza las ganancias de esta, para ello, toma como base el tiempo en el que requiere terminar cada uno de los proyectos. Para realizar el p...
14
artículo
Publicado 2010
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It has been obtained a good quality copper cement from copper-zinc sulphides ores of the east peruvian Andes at Marañon complex zone using integrated metallurgical processes, that makes easier the possibility to give technological value to peruvian concentrates of copper. Monitoring obtained products employing combined techniques such the X-Ray diffraction or the Mössbauer spectroscopy allow us to have a better information of the existing elements and help to control and optimize the metallurgical processes. With the Cementation Cinetic Equation there have been carried out simulations of the process, considering the process related variables, like time, agitation, solution concentration, pH, etc. Recovery has reported up to 70% of copper, that gives the way to improve national ore and concentrate extraction costs and open a great possibility to apply it to postergated small and medium ...
15
artículo
Publicado 2010
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A partir de minerales sulfurados de cobre-zinc del Complejo Marañón de la Cordillera Oriental de los Andes peruanos mediante procesos metalúrgicos integrados se ha obtenido cementos de cobre de buena calidad, lo cual facilita la viabilidad de dar valor tecnológico a los concentrados nacionales de cobre. El monitoreo de los productos obtenidos empleando técnicas combinadas de caracterización tales como difracción de rayos X, y espectroscopia Mössbauer nos permite tener una mejor información de las especies participantes y además nos ayuda a controlar y optimizar mejor los procesos metalúrgicos. Con la Ecuación Cinética de cementación se han procedido a realizar simulaciones del proceso considerando las variables involucradas en el proceso tales como tiempo, agitación, concentración de soluciones, pH entre otros. Se reportan recuperaciones mayores del 70% de cobre lo cual n...
16
tesis de grado
Magnetron sputtering system is a technique that consists in extracting atoms from a target material by collisions of energetic ions of an inert gas. It is widely used in semiconductor industries and materials processing research for developing thin films by deposition. During this process a low temperature capacitively coupled plasma is generated near the cathode and several variations of the properties of this plasma can affect the thin film deposition process and quality. An approach to study these types of systems is by computational modeling. The use of robust computational codes that can handle complicated geometries and can solve complex systems of differential equations. In this present project we aim to model numerically a system of magnetrons developed at the Materials Science and Renewable Energies (MatER) laboratory. Using the geometry measurements and the material properties ...
17
preprint
This paper describes the results of a numerical study of a full-scale adobe building model tested on a shaking table. Material properties of adobe masonry were calibrated to represent the wall in-plane seismic behavior, based on a prior numerical analysis of an adobe wall carried out by the authors. The inelastic part of the constitutive model was represented by a softening curve in tension and by a hardening/softening behavior in compression; thus, the fracture energy is a key issue in the modeling process. A finite element model that relies on a homogenous continuum approach was developed in Abaqus/Explicit software. The damage evolution in the numerical simulation represented fairly well the experimental crack pattern, for in-plane and out-of-plane seismic effects. Overall, the calibrated material properties and the explicit solution scheme proved to be appropriate for simulating the ...
18
artículo
Publicado 2003
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The flow of a laminar fluid that filters through a porous medium is considered. This behavior leads to the formulation of a mathematical model that, through the Baiocchi transformation, allows it to be expressed as a free boundary problem. In this we wish to evaluate the pressure gradient of the fluid in the medium. The present work consists of the following: i) variational formulation of the problem il) study ofthe existence and uniqueness of the solution and iii) numerical resolution of the problem ofgenerated convex minimization. To find the numerical solution of the variational inequality, the Finite Element method and the Uzawa algorithm have been used.In the numerical simulation of the dam problem, the domain has been consideredof computational calculation, a rectangular IR geometry, assuming as known boundaries, the impermeable zone, the one in contact with the air and the one tha...
19
tesis de grado
Publicado 2018
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The present work entitled "Modeling the Embedding Process Using the Finite Element Method". This study aims to obtain a methodology and a simple sequence that leads to a rapid and consistent formulation in such a way that a computer simulation can be carried out. Determining what types of considerations should be taken into account to formulate a simulation approach in the sausage, establishing the relevant methodology that guides us throughout the modeling process, making the most appropriate formulation, choosing the most appropriate elements, and determining the distribution and behavior of the mechanical parameters during the sausage process. In such a way that they can increase their level of capacity, performance of the process, as well as greatly reduce the sausage tests since we would know with much more accuracy what could happen during the sausage and if any problem arises we w...
20
tesis de grado
Publicado 2013
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The industrial development at the world-wide level has experienced remarkable advances in the last years with respect to the Technology of Materials and it shows to the great meaning and importance to us that have metals specially the steel and their alloys using for the construction and manufacture of machineries, equipment, pieces and elements of machines._x000D_ At the present time the Physicists who work in the area of Materials have knowledge, that all the materials present/display own defects of their process of manufacture, like for example: vacancies, break-ups, pores, non-metallic inclusions and fissures; being the fissures the critical defects but, since these act like tension concentrators, arriving to propagate and to cause a catastrophic fracture, under applied conditions of load, inferior to those of design._x000D_ In the study of fault analysis this being developed a very ...
