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Listar por palabra clave "Finite difference"

Mostrando ítems 1-9 de 9

A conceptual numerical model to simulate hydraulic head in aquifers that are hydraulically connected to surface water bodies

Pulido Velázquez, David; Sahuquillo Herráiz, Andrés; Andreu Álvarez, Joaquín (Wiley: 12 months, 2011-07)

In this paper, we present a conceptual-numerical model that can be deduced from a calibrated finite difference groundwater-flow model, which provides a parsimonious approach to simulate and analyze hydraulic heads and ...
A consistent stable numerical scheme for a nonlinear option pricing model in illiquid markets

Company Rossi, Rafael; Jódar Sánchez, Lucas Antonio; Pintos Taronger, José Ramón (Elsevier, 2012-06)

Markets liquidity is an issue of very high concern in financial risk management. In a perfect liquid market the option pricing model becomes the well-known linear Black-Scholes problem. Nonlinear models appear when transaction ...
A front-fixing numerical method for a free boundary nonlinear diffusion logistic population model

Piqueras-García, Miguel Ángel; Company Rossi, Rafael; Jódar Sánchez, Lucas Antonio (Elsevier, 2017)

[EN] The spatial temporal spreading of a new invasive species in a habitat has interest in ecology and is modeled by a moving boundary diffusion logistic partial differential problem, where the moving boundary represents ...
Analysis of shock capturing methods for chemical species transport in unsteady compressible flow

Serrano Cruz, José Ramón; Climent, H.; Piqueras, P.; García Afonso, Óscar (Elsevier, 2013-04)

This paper presents a chemical species transport model to account for variable composition and gas properties along the flow path in internal combustion engines. The numerical solution to adapt the gas dynamic model to ...
Conditional full stability of positivity-preserving finite difference scheme for diffusion advection-reaction models

Company Rossi, Rafael; Egorova, Vera; Jódar Sánchez, Lucas Antonio (Elsevier, 2018)

[EN] The matter of the stability for multidimensional diffusion-advection-reaction problems treated with the semi-discretization method is remaining challenge because when all the stepsizes tend simultaneously to zero the ...
Explicit finite-difference time-domain scheme for the simulation of 1-3 piezoelectric effect in axisymmetrical configurations

Ferri García, Marcelino; Camarena Femenia, Francisco; Redondo, Javier; Picó Vila, Rubén; Avis, Mark R. (Elsevier, 2012-09)

[EN] Numerical simulations are useful in the processes of design, development and optimization of transducers for non-destructive testing. In this work, a three-dimensional velocity-stress finite-difference model is presented ...
Numerical difference solution of moving boundary random Stefan problems

Casabán, M.-C.; Company Rossi, Rafael; Jódar Sánchez, Lucas Antonio (Elsevier, 2023-01)

[EN] This paper deals with the construction of numerical solutions of moving boundary random problems where the uncertainty is limited to a finite degree of randomness in the mean square framework. Using a front fixing ...
Numerical Methods for Multidisciplinary Free Boundary Problems: Numerical Analysis and Computing

Piqueras García, Miguel Ángel (Universitat Politècnica de València, 2018-09-10)

Multitud de problemas en ciencia e ingeniería se plantean como ecuaciones en derivadas parciales (EDPs). Si la frontera del recinto donde esas ecuaciones han de satisfacerse se desconoce a priori, se habla de "Problemas ...
Solving Allen-Cahn equations with periodic and nonperiodic boundary conditions using mimetic finite-difference operators

Orizaga, Saulo; González Parra, Gilberto Carlos; Forman, Logan; Villegas-Villanueva, Jesús (Elsevier, 2025-01-01)

[EN] In this paper, we investigate and implement a numerical method that is based on the mimetic finite difference operator in order to solve the nonlinear Allen-Cahn equation with periodic and non-periodic boundary ...