Zobrazeno 1 - 10
of 75
pro vyhledávání: '"Alexandre M. Afonso"'
Autor:
Ramin Rahmani, Pedro R. Resende, Rúben Couto, Sérgio I. Lopes, Rahul Kumar, Himanshu S. Maurya, Javad Karimi, Alexandre M. Afonso, Abrar Hussain, João C.C. Abrantes
Publikováno v:
Journal of Alloys and Metallurgical Systems, Vol 7, Iss , Pp 100097- (2024)
Additively manufactured complex geometries from copper alloys with high thermal and mechanical properties have drawn the attention of researchers. The present contribution explores the additive manufacturing (AM) of copper-based alloys from powder pa
Externí odkaz:
https://doaj.org/article/8cedb1c98d3e400890d380057a651bbe
Publikováno v:
Energies, Vol 17, Iss 6, p 1327 (2024)
This work presents a state-of-the-art review of micro-combustion flame dynamics and micro propulsion systems. In the initial section, we focus in on the different challenges of micro-combustion, investigating the typical length and time scales involv
Externí odkaz:
https://doaj.org/article/7ddad0b82a5f4af5b3c3676ddf1f4d4a
Publikováno v:
Semina: Ciências Exatas e Tecnológicas, Vol 44 (2023)
Conventional methods that are commonly used for the preparation of microbubble delivery systems include sonication, high-shear emulsification, and membrane emulsification. However, these methods present significant disadvantages, namely, poor control
Externí odkaz:
https://doaj.org/article/7ed961162cef4f9781adab956407c29e
Autor:
Luís L. Ferrás, Alexandre M. Afonso
Publikováno v:
Applied Sciences, Vol 13, Iss 2, p 1022 (2023)
Viscoelastic materials are abundant in nature and present in our daily lives [...]
Externí odkaz:
https://doaj.org/article/4dcdcc1d4da741eba4148e53922cbefb
Autor:
Francisco Barros, Nuno Viriato, Carlos Veiga Rodrigues, Luís L. Ferrás, Mário A. P. Vaz, Alexandre M. Afonso
Publikováno v:
Semina: Ciências Exatas e Tecnológicas, Vol 42, Iss 2 (2021)
In this work we perform a numerical study on the flow around the hulls of competition kayaks with the aim of predicting accurate drag forces. The numerical simulations were first performed using the Wigley hull geometry, a typical validation case for
Externí odkaz:
https://doaj.org/article/8272d897e95c4271a7c0437cf02d7050
Publikováno v:
Energies, Vol 15, Iss 9, p 2975 (2022)
With the recent advancements in computational capacities and the widespread applications of machine learning in engineering problems, the role of numerical methods has been becoming more and more important to improve existing models or develop new mo
Externí odkaz:
https://doaj.org/article/b454b1ab41b24c7186def08d7a85be93
Publikováno v:
Energies, Vol 15, Iss 2, p 626 (2022)
This work reports a numerical investigation of microcombustion in an undulate microchannel, using premixed hydrogen and air to understand the effect of the burner design on the flame in order to obtain stability of the flame. The simulations were per
Externí odkaz:
https://doaj.org/article/fc43936ceae6480aa06ad1b1b7c9daa9
Publikováno v:
Applied Sciences, Vol 11, Iss 21, p 10352 (2021)
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://doaj.org/article/c5b10d0a48c34e5a9acccc1cc53686fa
Publikováno v:
Fluids, Vol 6, Iss 11, p 384 (2021)
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://doaj.org/article/7ba5a9fa16fb4dddb50193611cdd81ee
Publikováno v:
Fluids, Vol 6, Iss 7, p 240 (2021)
This work presents a detailed numerical investigation on the required development length (L=L/B) in laminar Newtonian fluid flow in microchannels with rectangular cross section and different aspect ratios (AR). The advent of new microfluidic technolo
Externí odkaz:
https://doaj.org/article/546bcb42d9d34966bcb35d8062a2e4a5