Visualitza UJI: Investigación per autoria "56893b41-0bf9-4d12-974a-98bbeb3d17a0"
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A CFD-DEM solver to model bubbly flow. Part I: Model development and assessment in upward vertical pipes
Peña Monferrer, Carlos; Monrós Andreu, Guillem; chiva, sergio; Martinez Cuenca, Raul; Muñoz-Cobo, Jose-Luis Elsevier (2018-02-02)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 the ... -
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, sergio; Martinez Cuenca, Raul; Muñoz-Cobo, Jose-Luis Elsevier (2018-02-23)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 the ... -
An experimental investigation on the characteristics of submerged horizontal gas jets in liquid ambient
Harby, K.; chiva, sergio; Muñoz-Cobo, Jose-Luis (2014)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, K.; chiva, sergio; Muñoz-Cobo, Jose-Luis Elsevier (2014)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 ... -
Averaging methods of the gap heat transfer coefficients and the loss form coefficients of nuclear reactor cores loaded with different fuel bundles
Sekhri, A.; Muñoz-Cobo, Jose-Luis; chiva, sergio; Escrivá, A.; Mendizábal, R.; Pelayo, F. Elsevier (2009)When performing transient analysis in heterogeneous nuclear reactors loaded with different types of fuel bundles is necessary to model the reactor core by a few representative fuel elements with average properties of a ... -
CFD modelling and validation of upward bubbly flow in an adiabatic vertical pipe using the quadrature method of moments
Peña Monferrer, Carlos; Passalacqua, A.; chiva, sergio; Muñoz-Cobo, Jose-Luis Elsevier (2016)An Eulerian–Eulerian approach was investigated to model adiabatic bubbly flow with CFD techniques. In the framework of the OpenFOAM® software, a two-fluid model solver was modified to include a population balance equation, ... -
CFD Turbulence Study of PWR Spacer-Grids in a Rod Bundle
Peña Monferrer, Carlos; Muñoz-Cobo, Jose-Luis; chiva, sergio Hindawi Publishing Corporation (2014-06)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 ... -
Development of Conductivity Sensors for Multi-Phase Flow Local Measurements at the Polytechnic University of Valencia (UPV) and University Jaume I of Castellon (UJI)
Muñoz-Cobo, Jose-Luis; chiva, sergio; Méndez, Santos; Monrós Andreu, Guillem; Escrivá, A.; Cuadros, José Luis MDPI (2017)This paper describes all the procedures and methods currently used at UPV (Universitat Politécnica de Valencia) and UJI (University Jaume I) for the development and use of sensors for multi-phase flow analysis in vertical ... -
Modelling and experimental investigation of horizontal buoyant gas jets injected into stagnant uniform ambient liquid
Harby, K.; chiva, sergio; Muñoz-Cobo, Jose-Luis Elsevier (2017-07)In this article, an experimental and theoretical study on the buoyant non-condensable gas jet that is injected horizontally into a high-density liquid ambient at different initial conditions is performed. Direct and ... -
On the One-Dimensional Modeling of Vertical Upward Bubbly Flow
Peña Monferrer, Carlos; Gómez Zarzuela, C.; chiva, sergio; Miró, R.; Verdú, Gumersindo; Muñoz-Cobo, Jose-Luis Hindawi Publishing Corporation (2018)The one-dimensional two-fluid model approach has been traditionally used in thermal-hydraulics codes for the analysis of transients and accidents in water–cooled nuclear power plants. This paper investigates the performance ... -
Simulation of bubbly flow in vertical pipes by coupling Lagrangian and Eulerian models with 3D random walks models: Validation with experimental data using multi-sensor conductivity probes and Laser Doppler Anemometry
Muñoz-Cobo, Jose-Luis; chiva, sergio; Ali Abd El Aziz Essa, Mohamed; Mendes, Santos Elsevier (2012)A set of two phase flow experiments for different conditions ranging from bubbly flow to cap/slug flow have been performed under isothermal concurrent upward air-water flow conditions in a vertical column of 3 m height. ...