Výsledky vyhledávání - "Luís Jorge Lima Ferrás"

Akademický článek

Characteristics of synovial trihybrid nanofluid activation energy and Marangoni convective flow: A Computational framework of local thermal non-equilibrium

Autor: Haowen Yuan, Ahmed Zubair Jan, Afraz Hussain Majeed, Lixiang Shi, Krzysztof Kędzia, Luís Jorge Lima Ferrás, Mohamed R. Ali, Ahmed S. Hendy

Publikováno v: Case Studies in Thermal Engineering, Vol 59, Iss , Pp 104519- (2024)

The impact of nonlinear heat source and activation energy on magnetized Synovial trihybrid nanofluid Marangoni convective flow across a sheet combining two viscosity models is investigated in this study. Heat sources, activation energy, and condition

Externí odkaz: https://doaj.org/article/bdff873c83454175b025935e61acb2ed

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New boundary conditions for simulating the filling stage of the injection molding process

Autor: João M. Nóbrega, Ana Magalhães, Wagner de Campos Galuppo, Luís Jorge Lima Ferrás, C. Fernandes

Publikováno v: Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP

Purpose The purpose of this paper is to develop new boundary conditions for simulating the injection molding process of polymer melts. Design/methodology/approach The boundary conditions are derived and implemented to simulate real-life air vents (us

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3a490646bc2b2b87c37ffa5c843f236f
https://doi.org/10.1108/ec-04-2020-0190

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High-Order Methods for Systems of Fractional Ordinary Differential Equations and Their Application to Time-Fractional Diffusion Equations

Autor: Magda Rebelo, Luís Jorge Lima Ferrás, M. L. Morgado, Neville J. Ford

Publikováno v: Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP

Taking into account the regularity properties of the solutions of fractional differential equations, we develop a numerical method which is able to deal, with the same accuracy, with both smooth and nonsmooth solutions of systems of fractional ordina

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ded110990e0d07d81ec51da759c5f6ab
https://doi.org/10.1007/s11786-019-00448-x

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Development length of fluids modelled by the gPTT constitutive differential equation

Autor: Juliana Bertoco, A. Castelo, Luís Jorge Lima Ferrás, Alexandre M. Afonso, Rosalía T. Leiva

Publikováno v: Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Applied Sciences, Vol 11, Iss 10352, p 10352 (2021)
Applied Sciences
Volume 11
Issue 21
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP

In this work, we present a numerical study on the development length (the length from the channel inlet required for the velocity to reach 99% of its fully-developed value) of a pressure-driven viscoelastic fluid flow (between parallel plates) modell

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d3b88702722e0db4a674f51a18eed6b6

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Flow Structures Identification through Proper Orthogonal Decomposition: The Flow around Two Distinct Cylinders

Autor: Luís Jorge Lima Ferrás, Ângela M. Ribau, N. D. Gonçalves, Alexandre M. Afonso

Publikováno v: Fluids, Vol 6, Iss 384, p 384 (2021)
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Fluids
Volume 6
Issue 11

Numerical simulations of fluid flows can produce a huge amount of data and inadvertently important flow structures can be ignored, if a thorough analysis is not performed. The identification of these flow structures, mainly in transient situations, i

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dbf0687fb11115900cbb05e46325149e
https://www.mdpi.com/2311-5521/6/11/384

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Optimisation approach for parameter estimation of the generalised PTT viscoelastic model

Autor: Luís Jorge Lima Ferrás, C. Coelho, M. Fernanda P. Costa

Publikováno v: Computational Science and Its Applications – ICCSA 2021 ISBN: 9783030869724
ICCSA (4)

The exponential form of the original Phan-Thien and Tanner (PTT) model is often used to study complex viscoelastic fluids. Recently, a generalised version of the PTT model, that uses the Mittag-Leffler function to compute a new function of the trace

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::91737fbc3a299e0c68947384189f7197
https://hdl.handle.net/1822/75254

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A generalised Phan–Thien—Tanner model

Autor: Gareth H. McKinley, Luís Jorge Lima Ferrás, Alexandre M. Afonso, Magda Rebelo, M. L. Morgado

Publikováno v: Journal of Non-Newtonian Fluid Mechanics. 269:88-99

In this work we propose a novel generalised form of the Phan–Thien and Tanner (PTT) model by considering a new functional form of the nonlinear expression characterizing the destruction of physical network junctions and entanglements. This new func

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5fc253a3d5ce5d4fb88a2c5adc09cf35
https://doi.org/10.1016/j.jnnfm.2019.06.001

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A study on mixed electro-osmotic/pressure-driven microchannel flows of a generalised Phan-Thien–Tanner fluid

Autor: Alexandre M. Afonso, A. M. Ribau, Manuel A. Alves, Fernando T. Pinho, M. L. Morgado, Luís Jorge Lima Ferrás, Magda Rebelo

Publikováno v: Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP

This work presents new semi-analytical solutions for the combined fully developed electro-osmotic pressure-driven flow in microchannels of viscoelastic fluids, described by the generalised Phan-Thien–Tanner model (gPTT) recently proposed by Ferrás

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::da800a05817ae092b77cfd366bb9ad76

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A Numerical Method for the Transient Couette Flow of a Distributed-Order Viscoelastic Fluid

Autor: Magda Rebelo, Luís Jorge Lima Ferrás, M. L. Morgado

Publikováno v: Computational Science and Its Applications – ICCSA 2021 ISBN: 9783030869724
ICCSA (4)

This work presents a numerical method for the solution of two coupled distributed-order fractional differential equations, that appear in the pure tangential flow of fluids modelled by the Distributed-Order Viscoelastic Model. We prove the solvabilit

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::45b1b08789e5b0c88c3603d3af76d913
https://doi.org/10.1007/978-3-030-86973-1_29

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Dispersion of Graphite Nanoplates in Polypropylene by Melt Mixing: The Effects of Hydrodynamic Stresses and Residence Time

Autor: Denis Semyonov, José A. Covas, João M. Nóbrega, C. Fernandes, Luís Jorge Lima Ferrás

Publikováno v: Polymers
Volume 13
Issue 1
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Polymers, Vol 13, Iss 102, p 102 (2021)

This work combines experimental and numerical (computational fluid dynamics) data to better understand the kinetics of the dispersion of graphite nanoplates in a polypropylene melt, using a mixing device that consists of a series of stacked rings wit

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1842c91cdf03314f7e80081cffdfc3e9
https://pubmed.ncbi.nlm.nih.gov/33383790

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