Large eddy simulation of partial cavitation around a 2D plane-convex hydrofoil

Investigations of attached partial cavitation are important because to prevent damages in hydrulic machinery and to reduce the costs. As expected computational fluid dynamics (CFD) methods have been developed for more than 40 years to understand this phenomenon and to improve the machinery designs, as pumps and hydraulic turbines. However, cavitation appears at high Reynolds numbers, so that, the traditional turbulence models Reynolds-averaged Navier-Stokes (RANS)Postprint (published version

4to. Congreso Internacional de Ciencia, Tecnología e Innovación para la Sociedad. Memoria académica

Este volumen acoge la memoria académica de la Cuarta edición del Congreso Internacional de Ciencia, Tecnología e Innovación para la Sociedad, CITIS 2017, desarrollado entre el 29 de noviembre y el 1 de diciembre de 2017 y organizado por la Universidad Politécnica Salesiana (UPS) en su sede de Guayaquil. El Congreso ofreció un espacio para la presentación, difusión e intercambio de importantes investigaciones nacionales e internacionales ante la comunidad universitaria que se dio cita en el encuentro. El uso de herramientas tecnológicas para la gestión de los trabajos de investigación como la plataforma Open Conference Systems y la web de presentación del Congreso http://citis.blog.ups.edu.ec/, hicieron de CITIS 2017 un verdadero referente entre los congresos que se desarrollaron en el país. La preocupación de nuestra Universidad, de presentar espacios que ayuden a generar nuevos y mejores cambios en la dimensión humana y social de nuestro entorno, hace que se persiga en cada edición del evento la presentación de trabajos con calidad creciente en cuanto a su producción científica. Quienes estuvimos al frente de la organización, dejamos plasmado en estas memorias académicas el intenso y prolífico trabajo de los días de realización del Congreso Internacional de Ciencia, Tecnología e Innovación para la Sociedad al alcance de todos y todas

Large eddy simulation of partial cavitation around a 2D plane-convex hydrofoil

Investigations of attached partial cavitation are important because to prevent damages in hydrulic machinery and to reduce the costs. As expected computational fluid dynamics (CFD) methods have been developed for more than 40 years to understand this phenomenon and to improve the machinery designs, as pumps and hydraulic turbines. However, cavitation appears at high Reynolds numbers, so that, the traditional turbulence models Reynolds-averaged Navier-Stokes (RANS

Numerical simulation of cavitation-erosion on a plane-convex hydrofoil using a homogeneous mixture assumption

A better understanding of the cavitation-erosion mechanism is important to improve the prediction of the affected region under unsteady cavitation condition. For that, a new model has been proposed to estimate the microjet speed, which is based on a homogeneous mixture assumption and the energy transformation from potential to kinetic energy. A numerical simulation of unsteady cavitating flow around a plane-convex hydrofoil with semi cylindrical obstacle has been carried out, which is based on experimental studies from the cavitation tunnel of the EPFL. Results obtained using the new proposed model, shows that the affected region by the flow has been estimated fairly well and matches experimental results.Postprint (published version

Large eddy simulation of partial cavitation around a 2D plane-convex hydrofoil

Investigations of attached partial cavitation are important because to prevent damages in hydrulic machinery and to reduce the costs. As expected computational fluid dynamics (CFD) methods have been developed for more than 40 years to understand this phenomenon and to improve the machinery designs, as pumps and hydraulic turbines. However, cavitation appears at high Reynolds numbers, so that, the traditional turbulence models Reynolds-averaged Navier-Stokes (RANS

Numerical simulation of cavitation-erosion on a plane-convex hydrofoil using a homogeneous mixture assumption

A better understanding of the cavitation-erosion mechanism is important to improve the prediction of the affected region under unsteady cavitation condition. For that, a new model has been proposed to estimate the microjet speed, which is based on a homogeneous mixture assumption and the energy transformation from potential to kinetic energy. A numerical simulation of unsteady cavitating flow around a plane-convex hydrofoil with semi cylindrical obstacle has been carried out, which is based on experimental studies from the cavitation tunnel of the EPFL. Results obtained using the new proposed model, shows that the affected region by the flow has been estimated fairly well and matches experimental results

Técnica de Modelo Alterado: Reporte de un Caso Clínico

Los pacientes edéntulos constituyen un verdadero reto para el profesional en odontología, por lo tanto, es necesario repasar periódicamente los contenidos del tema, y analizar los casos clínicos que se presentan en nuestra labor diaria.El siguiente caso corresponde a la elaboración de una prótesis mucodentosoportada en una paciente edéntulo bilateral del maxilar inferior, teniendo como objetivo principal la estabilidad y soporte a través de la compresión de la mucosa y correcta selección de dientes pilares. Este tipo de casos se considera realmente atractivo para el dentista

Rotatory 3D structured mesh study using openFOAM to simulate the flow in francis turbine

The development of a methodology to simulate numerically the steady state flow field in Francis turbines was carried out using the open source CFD software OpenFOAM along with a MRF and AMI approach. A structured mesh obtained from previous studies was used with some modifications to solve the presence of imbalance points in the simulation. Numerical simulations using the SIMPLE algorithm were performed together with two different turbulence models. It was confirmed that the results obtained reproduced the phenomenon with a great approximation and predicted the output load with only a deviation of around 5.02% against experimental dataPeer ReviewedPostprint (published version