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Type: Artigo
Title: Unified Integral Transforms Algorithm for Solving Multidimensional Nonlinear Convection-Diffusion Problems
Author(s)/Inventor(s): Cotta, Renato Machado
Knupp, Diego Campos
Naveira-Cotta, Carolina Palma
Sphaier, Leandro Alcoforado
Quaresma, João Nazareno Nonato
Abstract: Indisponível.
Abstract: The present work summarizes the theory and describes the algorithm related to an open-source mixed symbolic-numerical computational code named unified integral transforms (UNIT) that provides a computational environment for finding hybrid numerical-analytical solutions of linear and nonlinear partial differential systems via integral transforms. The reported research was performed by employing the well-established methodology known as the generalized integral transform technique (GITT), together with the symbolic and numerical computation tools provided by the Mathematica system. The main purpose of this study is to illustrate the robust precision-controlled simulation of multidimensional nonlinear transient convection-diffusion problems, while providing a brief introduction of this open source implementation. Test cases are selected based on nonlinear multidimensional formulations of Burgers’ equation, with the establishment of reference results for specific numerical values of the governing parameters. Special aspects in the computational behavior of the algorithm are then discussed, demonstrating the implemented possibilities within the present version of the UNIT code, including the proposition of a progressive filtering strategy and a combined criteria reordering scheme, not previously discussed in related works, both aimed at convergence acceleration of the eigenfunction expansions.
Keywords: Numerical methods
Convection-diffusion problems
Unified integral transforms
Generalized integral transform technique
Production unit: Núcleo Interdisciplinar de Dinâmica dos Fluidos
Publisher: Taylor & Francis
In: Numerical Heat Transfer, Part A Applications
Volume: 63
Issue: 11
Issue Date: 28-Feb-2013
DOI: 10.1080/10407782.2013.756763
Publisher country: Brasil
Language: eng
Right access: Acesso Aberto
ISSN: 1040-7782
Appears in Collections:Engenharias

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