International Journal of Automotive and Mechanical Engineering
A numerical assessment of a dry-sump oil system was performed by Computational Fluid Dynamics (CF... more A numerical assessment of a dry-sump oil system was performed by Computational Fluid Dynamics (CFD). Unlike conventional cars, race cars are subjected to high accelerations that induce oil sloshing. Hence, dry-sump oil systems are required to collect the oil outside of the engine prior to be pumped inside of it again. To avoid engine malfunctions, the dry-sump must guarantee continuously oil suction in every maneuver. To perform such simulations, the model was subjected to different car maneuvers extracted from data acquisition available from real race car. It has showed that single and combined maneuvers, such as acceleration, braking and turnings can induce downward, upward and lateral accelerations higher than 2 g during several seconds. Therefore, four different single maneuvers (acceleration, deceleration, turn right and turn left) as well as a set of contaminated maneuvers (braking and turning) were studied. Simulations were achieved by mean of the Volume of Fluid Method (VOF)...
This mini-symposium is intended to share experiences and discuss opportunities for application of... more This mini-symposium is intended to share experiences and discuss opportunities for application of numerical methods to the resolution of engineering problems related to industrial and government activities. Both researchers and project/design engineers are encouraged to show the evolution in application of computational methods to solve industrial problems in their fields, and the opportunities to improve the results that could be obtained. Some topics that could be treated in this mini-symposium include: - Industrial installations and their components - Machines and their components - Structures and their components - Pressure vessels and reactors - Manufacturing processes - Modelling of industrial physical and chemical processes - Failure analysis and forensic engineering
In this work, the performance of discrete and continuum computational models for addressing granu... more In this work, the performance of discrete and continuum computational models for addressing granular flow dynamics in a rotating drum at different regimes is studied. The results are compared to the experimental observations obtained by image processing of a high-speed camera on a pilot plant rotating drum. For the discrete modeling, Discrete Elements Method (DEM) through the open-source software LIGGGHTS(R) is used, while for the continuum model, the μ(I)-rheology is implemented in the general structure of a Volume-Of-Fluid (VOF) solver of the OpenFOAM(R) platform. Four test cases consisting of different sets of particles filling and rotational speed are considered and the results are analyzed in terms of solids distribution, the velocity of the particles, and mixing patterns. The solids distribution and velocities for each one of the tests considered are fairly similar between both computational techniques and the experimental observations. In general, DEM results show a higher le...
Abstract. Stress and plastic strain analysis are required to determine zones with risk of interna... more Abstract. Stress and plastic strain analysis are required to determine zones with risk of internal cracking in the early stages of solidification in steel continuous casting processes. The high computational cost of three-dimensional models with conveniently refined ...
Los gradientes térmicos que se presentan durante el servicio de ciertos componentes de máquinas t... more Los gradientes térmicos que se presentan durante el servicio de ciertos componentes de máquinas térmicas alcanzan en ocasiones magnitud suficiente como para generar deformaciones inelásticas que influyen sobre el estado tensional en condiciones de servicio, y se manifiestan como tensiones residuales al enfriar las piezas hasta temperatura ambiente. Una situación similar se presenta en piezas que son sometidas a tratamientos térmicos o fusión y solidificación localizados, tales como soldadura, aportes de metal fundido, temple por inducción, etc. Para determinar el estado tensional efectivo y la aptitud de la pieza para el servicio, es imprescindible conocer la magnitud de estas deformaciones inelásticas y sus tensiones residuales asociadas. Algunas de las técnicas experimentales disponibles en la actualidad (Difracción de Rayos X o neutrones, Ruido de Barkhäusen) solo brindan información respecto del estado tensional en la superficie de las piezas. Otras, tales como las rosetas de ga...
... El análisis dinámico de trenes de engranajes ha sido objeto de múltiples estudios durante las... more ... El análisis dinámico de trenes de engranajes ha sido objeto de múltiples estudios durante las últimas décadas (Gregory et al. (1963); Kubo et al. (1972); ¨Ozgüven and Houser (1988); Rama Mohana Rao and Muthuveerappan (1993); Vedmar and Henriksson (1998); Ajmi and ...
We present a numerical simulation of heat treatment of cast metallic alloys by the finite element... more We present a numerical simulation of heat treatment of cast metallic alloys by the finite element method, to predict strains and stresses produced during the said process. From a computational point of view, this problem involves a coupled thermal-metallurgical-mechanical analysis modeled as a non-stationary and non-linear process. The calculation of metallurgical properties is coupled directly with thermal analysis. Material properties, which are dependent on temperature and microstructural composition, are rewritten for the purpose of the analysis as functions of temperature and time. Results of thermo-metallurgical analysis are taken as data for the subsequent mechanical analysis. The simulation was successful and proved the causes of failure during heat treatment of a centrifugally cast three-layered Hi-Chrome work roll.
International Journal of Automotive and Mechanical Engineering
A numerical assessment of a dry-sump oil system was performed by Computational Fluid Dynamics (CF... more A numerical assessment of a dry-sump oil system was performed by Computational Fluid Dynamics (CFD). Unlike conventional cars, race cars are subjected to high accelerations that induce oil sloshing. Hence, dry-sump oil systems are required to collect the oil outside of the engine prior to be pumped inside of it again. To avoid engine malfunctions, the dry-sump must guarantee continuously oil suction in every maneuver. To perform such simulations, the model was subjected to different car maneuvers extracted from data acquisition available from real race car. It has showed that single and combined maneuvers, such as acceleration, braking and turnings can induce downward, upward and lateral accelerations higher than 2 g during several seconds. Therefore, four different single maneuvers (acceleration, deceleration, turn right and turn left) as well as a set of contaminated maneuvers (braking and turning) were studied. Simulations were achieved by mean of the Volume of Fluid Method (VOF)...
This mini-symposium is intended to share experiences and discuss opportunities for application of... more This mini-symposium is intended to share experiences and discuss opportunities for application of numerical methods to the resolution of engineering problems related to industrial and government activities. Both researchers and project/design engineers are encouraged to show the evolution in application of computational methods to solve industrial problems in their fields, and the opportunities to improve the results that could be obtained. Some topics that could be treated in this mini-symposium include: - Industrial installations and their components - Machines and their components - Structures and their components - Pressure vessels and reactors - Manufacturing processes - Modelling of industrial physical and chemical processes - Failure analysis and forensic engineering
In this work, the performance of discrete and continuum computational models for addressing granu... more In this work, the performance of discrete and continuum computational models for addressing granular flow dynamics in a rotating drum at different regimes is studied. The results are compared to the experimental observations obtained by image processing of a high-speed camera on a pilot plant rotating drum. For the discrete modeling, Discrete Elements Method (DEM) through the open-source software LIGGGHTS(R) is used, while for the continuum model, the μ(I)-rheology is implemented in the general structure of a Volume-Of-Fluid (VOF) solver of the OpenFOAM(R) platform. Four test cases consisting of different sets of particles filling and rotational speed are considered and the results are analyzed in terms of solids distribution, the velocity of the particles, and mixing patterns. The solids distribution and velocities for each one of the tests considered are fairly similar between both computational techniques and the experimental observations. In general, DEM results show a higher le...
Abstract. Stress and plastic strain analysis are required to determine zones with risk of interna... more Abstract. Stress and plastic strain analysis are required to determine zones with risk of internal cracking in the early stages of solidification in steel continuous casting processes. The high computational cost of three-dimensional models with conveniently refined ...
Los gradientes térmicos que se presentan durante el servicio de ciertos componentes de máquinas t... more Los gradientes térmicos que se presentan durante el servicio de ciertos componentes de máquinas térmicas alcanzan en ocasiones magnitud suficiente como para generar deformaciones inelásticas que influyen sobre el estado tensional en condiciones de servicio, y se manifiestan como tensiones residuales al enfriar las piezas hasta temperatura ambiente. Una situación similar se presenta en piezas que son sometidas a tratamientos térmicos o fusión y solidificación localizados, tales como soldadura, aportes de metal fundido, temple por inducción, etc. Para determinar el estado tensional efectivo y la aptitud de la pieza para el servicio, es imprescindible conocer la magnitud de estas deformaciones inelásticas y sus tensiones residuales asociadas. Algunas de las técnicas experimentales disponibles en la actualidad (Difracción de Rayos X o neutrones, Ruido de Barkhäusen) solo brindan información respecto del estado tensional en la superficie de las piezas. Otras, tales como las rosetas de ga...
... El análisis dinámico de trenes de engranajes ha sido objeto de múltiples estudios durante las... more ... El análisis dinámico de trenes de engranajes ha sido objeto de múltiples estudios durante las últimas décadas (Gregory et al. (1963); Kubo et al. (1972); ¨Ozgüven and Houser (1988); Rama Mohana Rao and Muthuveerappan (1993); Vedmar and Henriksson (1998); Ajmi and ...
We present a numerical simulation of heat treatment of cast metallic alloys by the finite element... more We present a numerical simulation of heat treatment of cast metallic alloys by the finite element method, to predict strains and stresses produced during the said process. From a computational point of view, this problem involves a coupled thermal-metallurgical-mechanical analysis modeled as a non-stationary and non-linear process. The calculation of metallurgical properties is coupled directly with thermal analysis. Material properties, which are dependent on temperature and microstructural composition, are rewritten for the purpose of the analysis as functions of temperature and time. Results of thermo-metallurgical analysis are taken as data for the subsequent mechanical analysis. The simulation was successful and proved the causes of failure during heat treatment of a centrifugally cast three-layered Hi-Chrome work roll.
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