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Listar por autor "Muñoz-Cobo González, José Luís"

Mostrando ítems 1-20 de 86

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3D calculation of the lambda eigenvalues and eigenmodes of the two-group neutron diffusion equation by coarse-mesh nodal methods

Muñoz-Cobo, J.L.; Miró Herrero, Rafael; Wysocki, A.; SOLER DOMINGO, AMPARO (Elsevier, 2019-01)

[EN] This paper shows the development and roots of the lambda eigenvector and eigenmodes calculation by coarse-mesh finite difference nodal methods. In addition, this paper shows an inter-comparison of the eigenvalues and ...
A CFD-DEM solver to model bubbly flow. Part II: Critical validation in upward vertical pipes including axial evolution

Peña-Monferrer, Carlos; Monrós-Andreu, Guillem; Chiva Vicent, Sergio; Martinez-Cuenca, R.; Muñoz-Cobo, J. L. (Elsevier, 2018)

[EN] In the computational modeling of two-phase flow, many uncertainties are usually faced in simulations and validations with experiments. This has traditionally made it difficult to provide a general method to predict ...
A Comparative Analysis of Conductance Probes and High-Speed Camera Measurements for Interfacial Behavior in Annular Air-Water Flow

Rivera, Yago; Bidon, Maxime; Muñoz-Cobo, J. L.; Berna, C.; Escrivá, A. (MDPI AG, 2023-10)

[EN] Different techniques are used to analyze annular flow, but the more interesting ones are those techniques that do not perturb the flow and provide enough resolution to clearly distinguish the interfacial phenomena ...
A THEORETICAL INVESTIGATION OF AEROSOL RETENTION WITHIN THE SECONDARY SIDE OF A STEAM GENERATOR UNDER A SGTR SEVERE ACCIDENT SEQUENCE IN A PWR NUCLEAR POWER PLANT

López Del Prá, Claudia (Universitat Politècnica de València, 2012-04-17)

Las secuencias de accidente con rotura de tubos en el generador de vapor (secuencias SGTR) están consideradas como contribuyentes del riesgo en reactores de agua a presión. Su relevancia radica en la potencial liberación ...
Adecuación del código SPARC90 para la simulación de la captura de aerosoles por rotura en el generador de vapor

Escrivá Castells, Facundo Alberto; Muñoz-Cobo González, José Luís; Berna Escriche, César; Herranz, L.E. (Sociedad Nuclear Española, 2011-09)

Ponencia acerca de la mejora del cálculo del factor de descontaminación, que cuantifica el valor del cociente entre el flujo másico de entrada y salida de aerosoles durante la fase de expansión del chorro gaseoso que ...
An Eulerian-Lagrangian open source solver for bubbly flow in vertical pipes

Peña Monferrer, Carlos; Muñoz-Cobo González, José Luís; Monrós Andreu, G.; Martinez Cuenca, R.; Chiva Vicent, Sergio (Sociedad Nuclear Española, 2014-10)

Air-water two-phase flow is present in natural and industrial processes of different nature as nuclear reactors. An accurate local prediction of the boiling flow could support safety and operation analyses of nuclear ...
An experimental investigation on the characteristics of submerged horizontal gas jets in liquid ambient

Harby Mohamed Abd Alaal, Khaled; Chiva Vicent, Sergio; Muñoz-Cobo González, José Luís (Elsevier, 2014-02)

Gas injections into liquid are prevalent in the natural environment and are essential in industrial applications, they can lead to complex flow. The flow structure and processes are essentially unsteady and turbulent. In ...
An experimental study on bubble entrainment and flow characteristics of vertical plunging water jets

Harby Mohamed Abd Alaal, Khaled; Chiva Vicent, Sergio; Muñoz-Cobo González, José Luís (Elsevier, 2014-09)

When a vertical liquid jet plunges into a liquid surface after passing through a surrounding gas phase it entrains a large amount of gas bubbles into the receiving pool, and forms a large submerged two-phase region with a ...
Analysis of Conductance Probes for Two-Phase Flow and Holdup Applications

Muñoz-Cobo González, José Luís; Rivera-Durán, Yago; Berna Escriche, César; Escrivá Castells, Facundo Alberto (MDPI AG, 2020-12)

[EN] In this paper we perform an analysis of the conductance probes used in two-phase flow applications especially for two-phase flow tomography of annular flow, to measure the waves produced in the interface with different ...
Análisis del evento causado por la apertura involuntaria de válvulas de seguridad y alivio en la central nuclear de Leibstadt utilizando el código TRACE

Blanco, D.; Escrivá, A.; Muñoz-Cobo, J. L.; Berna, C.; Rosinelli, L.; Sekhri, A.; Fischer, K. (Sociedad Nuclear Española, 2019-09-28)

[ES] El objetivo fundamental de los códigos termohidráulicos es simular el comportamiento de un reactor nuclear frente a distintos escenarios, como transitorios de planta y accidentes. El desarrollo de estos códigos ha ...
Aplicación de la Metodología BEPU a un Gran LOCA en una Central PWR mediante el código TRACE

Herrero-Carrión, Alejandro; Berna, C.; Escrivá, A.; Muñoz-Cobo, J. L.; Garcia-Fenoll, Marina; Posada, J.M. (Sociedad Nuclear Española, 2019-09-28)

[ES] En esta ponencia se muestran los resultados más destacados obtenidos hasta el momento al aplicar dicha metodología BEPU a una secuencia accidental LBLOCA en la planta nuclear de Trillo mediante el código TRACE v5.0 ...
Aplicación de la metodología de escalado a una rotura de pequeño tamaño entre la instalación experimental ROSA-LSTF y una planta PWR de 3 lazos del tipo Siemens-KWU

Berna, C.; Muñoz-Cobo, José L.; Escrivá, A. (Senda Editorial, 2018)

[ES] La metodología de escalado consiste en una descripción cuantitativa de las condiciones que se deben cumplir en una instalación experimental para poder reproducir adecuadamente el comportamiento de una planta comercial. ...
Auto-correlation and variance-to-mean measurements in a subcritical core obeying multiple alpha-modes

Berglöf, Carl; Fernández Ordóñez, Manuel; Villamarín, David; Bécares, Vicente; González Romero, Enrique M.; Bournos, Victor; Muñoz-Cobo González, José Luís (Elsevier Masson, 2011-02)

[EN] Neutron noise measurements based on the Rossi-α and Feynman-α methodologies have been performed in a heterogeneous subcritical system. It is shown that the traditional single alpha-mode formulations of the Rossi-α and ...
CERN antiproton target: Hydrocode analysis of its core material dynamic response under proton beam impact

Torregrosa Martín, Claudio Leopoldo; Perillo Marcone, Antonio; Calviani, Marco; Muñoz-Cobo González, José Luís (American Physical Society, 2016-07-15)

Antiprotons are produced at CERN by colliding a 26 GeV=c proton beam with a fixed target made of a3 mm diameter, 55 mm length iridium core. The inherent characteristics of antiproton production involveextremely high energy ...
CFD modelling and validation of upward bubbly flow in an adiabatic vertical pipe using the quadrature method of moments

Peña Monferrer, Carlos; Passalacqua, Alberto; Chiva Vicent, Sergio; Muñoz-Cobo González, José Luís (Elsevier, 2016-05)

[EN] An Eulerian-Eulerian approach was investigated to model adiabatic bubbly flow with CFD techniques. In the framework of the OpenFOAM (R) software, a two-fluid model solver was modified to include a population balance ...
CFD simulation plus uncertainty quantification of the mixing of two fluid with different density for the Cold-Leg mixing benchmark

Rivera-Durán, Yago; Muñoz-Cobo, J. L.; Berna, C.; Escrivá, A.; Vela, E. (Elsevier, 2021-11)

[EN] This document describes the details of the simulations and uncertainty quantification of the Cold-Leg Mixing benchmark performed at the Institute for Energy Engineering (Polytechnic University of Valencia, Spain). The ...
CFD Turbulence Study of PWR Spacer-Grids in a Rod Bundle

Peña Monferrer, Carlos; Muñoz-Cobo González, José Luís; Chiva Vicent, Sergio (Hindawi Publishing Corporation, 2014)

Nuclear fuel bundles include spacers essentially for mechanical stability and to influence the flow dynamics and heat transfer phenomena along the fuel rods. This work presents the analysis of the turbulence effects of a ...
Characterization of the gas-liquid interfacial waves in vertical upward co-current annular flows

Cuadros-Orón, José Luis; Rivera-Durán, Yago; Berna, C.; Escrivá, A.; Muñoz-Cobo, J. L.; Monrós-Andreu, G.; Chiva, S. (Elsevier, 2019-05)

[EN] For more than fifty years, hundreds of research works have focused on the study of annular flow because of its huge importance in many industrial processes, for instance, chemical, petroleum, etc., being of particular ...
Chemical Kinetics Roots and Methods to Obtain the Probability Distribution Function Evolution of Reactants and Products in Chemical Networks Governed by a Master Equation

Muñoz-Cobo, José-Luis; Berna, Cesar (MDPI AG, 2019-02)

[EN] In this paper first, we review the physical root bases of chemical reaction networks as a Markov process in multidimensional vector space. Then we study the chemical reactions from a microscopic point of view, to ...
Comparison of Refractive Index Matching Techniques and PLIF40 Measurements in Annular Flow

Rivera, Yago; Bascou, Dorian; Blanco-Muelas, David; Álvarez-Piñeiro, Lucas; Berna, Cesar; Muñoz-Cobo, J. L.; Escrivá, A. (MDPI AG, 2023-04-05)

[EN] This paper investigates non-invasive techniques for annular two-phase flow analysis, focusing on liquid film characterization to understand the interfacial phenomena that are crucial for heat and mass transfer. Limited ...