Análise de problemas conjugados em microssistemas térmicos com múltiplas correntes e geometrias complexas via transformação integral
type: CreativeWork
description: A numerical-analytical hybrid solution is presented through the Generalized Integral Transformation Technique (GITT) using a single-domain reformulation with a total transformation scheme for problems of conjugated heat transfer in thermal micro-systems with flows of immiscible fluids in direct contact, multiple currents and microchannels of complex geometric configurations. The GITT is used in combination with a strategy to reformulate the problem in a single domain, through coefficients with spatial variation introduced in the energy equation, that allow to unify the formulations in the solid and fluid regions. Convergence acceleration alternatives of the expansions in autofunctions are analyzed, including the rearrangement of the terms in the expansion based on the diagonal of the matrix of coefficients of the transformed system and the use of recursive filters in the solution. Both showed a significant improvement in the convergence of the results, besides a good comparison with numerical results obtained through the COMSOL commercial platform.
abstract: A numerical-analytical hybrid solution is presented through the Generalized Integral Transformation Technique (GITT) using a single-domain reformulation with a total transformation scheme for problems of conjugated heat transfer in thermal micro-systems with flows of immiscible fluids in direct contact, multiple currents and microchannels of complex geometric configurations. The GITT is used in combination with a strategy to reformulate the problem in a single domain, through coefficients with spatial variation introduced in the energy equation, that allow to unify the formulations in the solid and fluid regions. Convergence acceleration alternatives of the expansions in autofunctions are analyzed, including the rearrangement of the terms in the expansion based on the diagonal of the matrix of coefficients of the transformed system and the use of recursive filters in the solution. Both showed a significant improvement in the convergence of the results, besides a good comparison with numerical results obtained through the COMSOL commercial platform.
author: Zotin, José Luiz Zanon
language: por
keywords: Análise numérica, Equações diferenciais parciais, Microcanais
date published: 2017-04
date modified: 2026-07-24T01:16:18Z
provider: Brazil UERJ
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: Universidade Federal do Rio de Janeiro

PropertyValue
property ID: Handle
value: http://hdl.handle.net/11422/5989