46 documents found, page 1 of 5
Modeling and simulation of a fixed bed gasification process for thermal treatme...
Oliveira, Matheus; Ramos, Ana; Monteiro, Eliseu; Rouboa, AbelThis work aims to develop a numerical simulation model of the combined and integrated production process of combustion and gasification, for a synthesis gas production system (SYNGAS), fed with municipal solid waste (MSW), agricultural and forestry waste. For this purpose, the EMSO software (Environment for Modeling, Simulation, and Optimization) was used in the formulation of a fixed-bed gasifier with the co-c...
Numerical modeling of plasma gasification process of polychlorinated biphenyl w...
Okati, Armin; Khani, Mohammad Reza; Shokri, Babak; Monteiro, Eliseu; Rouboa, AbelThe plasma gasification process is one of the most innovative and efficient methods for the disposal of various wastes and energy production. But it is still an extremely complicated process; therefore, to optimize it, modeling could be used as an invaluable asset. The aim of this study is to develop a computational model to evaluate the plasma gasification process of polychlorinated biphenyl wastes. The model ...
Hydrodynamic analysis of different finger positions in swimming: a computationa...
Vilas-Boas, João Paulo; Ramos, Rui Jorge; Fernandes, Ricardo Jorge; Machado, Leandro; Barbosa, Tiago Manuel Cabral dos Santos; Silva, AntónioThe aim of this research was to numerically clarify the effect of finger spreading and thumb abduction on the hydrodynamic force generated by the hand and forearm during swimming. A computational fluid dynamics (CFD) analysis of a realistic hand and forearm model obtained using a computer tomography scanner was conducted. A mean flow speed of 2 m∙s–1 was used to analyze the possible combinations of three finger...
The orientation effects of oar-blade on the drag coefficient using Computationa...
Laurent, A.; Rouard, A.; Alfaiate, A.; Mantha, Vishveshwar Rajendra; Silva, António; Marinho, Daniel; Rouboa, Abel
Modelling propelling force in swimming using numerical simulations
Marinho, D.A.; Barbosa, Tiago M.; Mantha, Vishveshwar; Rouboa, Abel; Silva, A.J.In the sports field, numerical simulation techniques have been shown to provide useful information about performance and to play an important role as a complementary tool to physical experiments. Indeed, this methodology has produced significant improvements in equipment design and technique prescription in different sports (Kellar et al., 1999; Pallis et al., 2000; Dabnichki & Avital, 2006). In swimming, this ...
O efeito da profundidade no arrasto hidrodinâmico durante o deslize em natação
Silva, António; Rouboa, Abel; Marinho, Daniel; Ramos, Rui Jorge; Mantha, Vishveshwar Rajendra; Novais, Maria Luísa Peixoto Gonçalves de Amorim
The effect of depth on drag during the streamlined glide: a three-dimensional C...
Novais, Maria Luísa Peixoto Gonçalves de Amorim; Mantha, Vishveshwar Rajendra; Ramos, Rui Jorge; Vilas-Boas, João Paulo; Luís, Sérgio R.; Silva, António
Effect of wearing a swimsuit on hydrodynamic drag of swimmer
Mantha, Vishveshwar Rajendra; Vilas-Boas, João Paulo; Ramos, Rui Jorge; Machado, Leandro J.; Silva, António; Marinho, Daniel; Rouboa, Abel
The effect of wearing a cap on the swimmers passive drag
Marinho, D.A.; Mantha, Vishveshwar; Rouboa, Abel; Vilas-Boas, João Paulo; Machado, Leandro; Barbosa, Tiago M.; Silva, A.J.
The hydrodynamic study of the swimming gliding: a two-dimensional computational...
Marinho, D.A.; Barbosa, Tiago M.; Rouboa, Abel; Silva, A.J.Nowadays the underwater gliding after the starts and the turns plays a major role in the overall swimming performance. Hence, minimizing hydrodynamic drag during the underwater phases should be a main aim during swimming. Indeed, there are several postures that swimmers can assume during the underwater gliding, although experimental results were not conclusive concerning the best body position to accomplish thi...