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Browsing by Author "Ginestar Peiro, Damián"

Now showing items 1-20 of 75

A block Arnoldi method for the SPN equations

Vidal-Ferràndiz, Antoni; Carreño, Amanda; Ginestar Peiro, Damián; Verdú Martín, Gumersindo Jesús (Taylor & Francis, 2020-02-01)

[EN] The simplified spherical harmonics equations are a useful approximation to the stationary neutron transport equation. The eigenvalue problem associated with them is a challenging problem from the computational point ...
A Ciliary Motility Index for Activity Measurement in Cell Cultures With Respiratory Syncytial Virus

Parrilla Bernabé, Eduardo; Armengot, Miguel; Mata, Manuel; Carda, Carmen; Cortijo, Julio; Moratal, David; Ginestar Peiro, Damián; Hueso, José L.; Riera Guasp, Jaime (SAGE Publishing, 2019-03-01)

[EN] Background: The respiratory epithelium is frequently infected by the respiratory syncytial virus, resulting in inflammation, a reduction in cilia activity and an increase in the production of mucus. Methods: In this ...
A multigrid method to compute the dominant lambda modes of a nuclear reactor

Carreño, Amanda; Vidal-Ferràndiz, Antoni; Ginestar Peiro, Damián; Verdú Martín, Gumersindo Jesús (International Center for Numerical Methods in Engineering (CIMNE), 2017-07-05)

[Otros] High accuracy is required for the solution of the lambda modes problem associated with the neutron diffusion equation. In this work, a multigrid method based on finite element method has been proposed to solve this ...
A study of the radiative transfer equation using a spherical harmonics-nodal collocation method

Capilla Romá, Maria Teresa; Talavera Usano, César Félix; Ginestar Peiro, Damián; Verdú Martín, Gumersindo Jesús (Elsevier, 2017)

[EN] Optical tomography has found many medical applications that need to know how the photons interact with the different tissues. The majority of the photon transport simulations are done using the diffusion approximation, ...
A time and frequency domain analysis of the effect of vibrating fuel assemblies on the neutron noise

Vidal-Ferràndiz, Antoni; Carreño, Amanda; Ginestar Peiro, Damián; Demazière, C.; Verdú Martín, Gumersindo Jesús (Elsevier, 2020-03)

[EN] The mechanical vibrations of fuel assemblies have been shown to give rise to high levels of neutron noise, triggering in some circumstances the necessity to operate nuclear reactors at a reduced power level. This work ...
Análisis de estabilidad en el reactor BWR Ringhals 1 con los códigos acoplados RELAP5/PARCS V2.7

Abarca Giménez, Agustín; Barrachina Celda, Teresa María; Miró Herrero, Rafael; Ginestar Peiro, Damián; Verdú Martín, Gumersindo Jesús (Grupo Senda, 2011-09)

En este trabajo, se ha realizado un análisis de estabilidad en los puntos de operación definidos en el bechmark de estabilidad de la central nuclear de Ringhals. Se quieren reproducir los resultados obtenidos en el ...
Aplicación de la Transformada de Laplace a la resolución de problemas de valores iniciales

Coll Aliaga, Peregrina del Carmen; Sanabria Codesal, Esther; Ginestar Peiro, Damián; Sánchez Juan, Elena (Universitat Politècnica de València, 2017-05-15)

En este objeto de aprendizaje se le presenta al alumno aplicaciones de la transformada de Laplace a la resolución de ecuaciones diferenciales con condiciones iniciales. Se utiliza el programa Mathematica para realizar los ...
Application of a nodal collocation approximation for the multidimensional P-L equations to the 3D Takeda benchmark problems

Capilla Romá, Maria Teresa; Talavera Usano, César Félix; Ginestar Peiro, Damián; Verdú Martín, Gumersindo Jesús (Elsevier Masson, 2012-02)

PL equations are classical approximations to the neutron transport equations, which are obtained expanding the angular neutron flux in terms of spherical harmonics. These approximations are useful to study the behavior of ...
Approximation of the Neutron Diffusion Equation on Hexagonal Geometries

González Pintor, Sebastián (Universitat Politècnica de València, 2012-11-16)

La ecuación de la difusión neutrónica describe la población de neutrones de un reactor nuclear. Este trabajo trata con este modelo para reactores nucleares con geometría hexagonal. En primer lugar se estudia la ecuación ...
Approximation of The Neutron Diffusion Equation on Hexagonal Geometries Using a h-p finite element method

Fayez Moustafa Moawad, Ragab (Universitat Politècnica de València, 2016-06-07)

[EN] The neutron diffusion equation is an approximation of the neutron transport equation that describes the neutron population in a nuclear reactor core. In particular, we will consider here VVER-type reactors which use ...
Assessment of LEACHN and a simple compartmental model to simulate nitrogendynamics in citrus orchards

Lidón Cerezuela, Antonio Luis; Ramos Mompó, Carlos; Ginestar Peiro, Damián; Contreras Espinosa, Wilson Alberto (Elsevier Masson, 2013-04)

A simple compartmental model using a tipping bucket approach for the water dynamics coupled with a nitrogen¿carbon transformations model has been adapted to simulate the soil nitrogen and water balance in mature orange ...
Block hybrid multilevel method to compute the dominant lambda-modes of the neutron diffusion equation

Carreño, A.; Vidal-Ferràndiz, Antoni; Ginestar Peiro, Damián; Verdú Martín, Gumersindo Jesús (Elsevier, 2018)

[EN] The dominant lambda-modes associated with a nuclear reactor configuration describe the neutron steady-state distribution and its criticality. Furthermore, they are useful to develop modal methods to study reactor ...
Block Preconditioning Matrices for the Newton Method to Compute the Dominant lambda-Modes Associated with the Neutron Diffusion Equation

Carreño, Amanda; Bergamaschi, Luca; Martinez, Angeles; Vidal-Ferràndiz, Antoni; Ginestar Peiro, Damián; Verdú Martín, Gumersindo Jesús (MDPI AG, 2019-03)

[EN] In nuclear engineering, the lambda-modes associated with the neutron diffusion equation are applied to study the criticality of reactors and to develop modal methods for the transient analysis. The differential ...
Compresión de imágenes mediante la descomposición en valores singulares

Hueso Pagoaga, José Luís; Ginestar Peiro, Damián; Riera Guasp, Jaime (Universitat Politècnica de València, 2015-06-05)

En la imagen digital, la intensidad de cada pixel se almacena en una matriz. Mediante la descomposicion en valores singulares, se consigue analizar las variaciones de la intensidad y expresar la matriz como suma de productos ...
Desarrollo de un sistema automático para el seguimiento del vuelo de un dron

Martínez Valero, Miguel (Universitat Politècnica de València, 2019-10-11)

[ES] La industria de las aeronaves pilotadas por control remoto (RPAs) y, en concreto, la de los drones, se encuentra en su apogeo. Por ello, surge la necesidad de descubrir modelos matemáticos capaces de definir la ...
Detección de bordes

Hueso Pagoaga, José Luís; Ginestar Peiro, Damián; Riera Guasp, Jaime (Universitat Politècnica de València, 2015-05-29)

El objeto muestra la aplicación de distintas técnicas de detección de bordes a imágenes médicas.
Development of a finite element method for neutron transport equation approximations

Vidal Ferràndiz, Antoni (Universitat Politècnica de València, 2018-02-27)

La ecuación del transporte neutrónico describe la población de neutrones y las reacciones nucleares dentro de un reactor nuclear. Primero, introducimos esta ecuación y las aproximaciones de la misma. Entonces, estudiamos ...
Development of a Finite Volume Inter-cell Polynomial Expansion Method for the Neutron Diffusion Equation

Bernal García, Álvaro; Román Moltó, José Enrique; Miró Herrero, Rafael; Ginestar Peiro, Damián; Verdú Martín, Gumersindo Jesús (Taylor & Francis, 2016)

Heterogeneous nuclear reactors require numerical methods to solve the neutron diffusion equation (NDE) to obtain the neutron flux distribution inside them, by discretizing the heterogeneous geometry in a set of homogeneous ...
Drazin inverse based numerical methods for singular linear differential systems

Coll Aliaga, Peregrina del Carmen; Ginestar Peiro, Damián; Sánchez Juan, Elena; Thome Coppo, Néstor Javier (ELSEVIER SCI LTD, 2012)

[EN] In this paper, numerical methods for the solution of linear singular differential system are analyzed. The numerical solution of initial value problem by means of a corresponding finite difference approach and a ...
Dynamic model of a shell-and-tube condenser. Analysis of the meanvoid fraction correlation influence on the model performance

Milián Sánchez, Victor; Navarro Esbrí, J.; Ginestar Peiro, Damián; Molés, F.; Peris, B. (Elsevier, 2013-09-15)

A moving-boundary dynamic model of a shell-and-tube condenser is presented. Within this approach, the mean void fraction is a relevant parameter which is obtained, in this work, using different correlations proposed in the ...