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Abstract(s)
O bio mimetismo da pele de tubarão é uma das técnicas mais interessantes para redução do atrito aerodinâmico e hidrodinâmico de forma passiva. Esta consiste na aplicação de ranhuras ao longo de uma superfície no sentido do escoamento de fluidos, uma vez que o controlo da transição de regime laminar para turbulento é conseguido mais facilmente.
Neste trabalho é proposta, a aplicação do bio mimetismo pele de tubarão em veículos automóveis e a respetiva simulação computacional através da aplicação das equações de Reynolds Averaged Navier-Stokes (RANS).
Utilizando os últimos avanços tecnológicos, podemos compreender melhor os fenómenos associados aos efeitos pretendidos. Simulando o efeito aerodinâmico da pele de tubarão, com o auxílio de computadores e software adequado, podemos prever o seu comportamento físico. Tal não era possível, por exemplo, na década de 80, em que a tecnologia não era tão acessível e a capacidade de processamento era mais reduzida. De salientar que há hoje um revivalismo nesta matéria devido aos avanços científicos entretanto realizados, devido também ao surgimento de novas tecnologias e novos materiais utilizando novos métodos de produção graças à nanotecnologia e impressoras tridimensionais, que hoje em dia estão muito em voga.
The biomimetic of the shark skin is one of the most interesting techniques for passive reducing the aerodynamic and hydrodynamic frictions. It consists on the application of grooves along the surface in the direction of the fluid’s flow, since the control of the laminar to turbulent transition regime is achieved more easily. This thesis proposes the application of the biomimetic of the shark skin in land vehicles and its computer simulation by applying the equations of Reynolds Averaged Navier-Stokes (RANS). Using the latest technologies, we can better understand the phenomena associated with the intended effects. Simulating the aerodynamic effect of the shark skin, with the support of computers and appropriate software, we can predict its physical behaviour. This was not possible, for example, in the eighties, when the technology wasn’t so accessible and the processing was reduced. It is important to emphasize that currently there is a revival regarding this matter due to scientific advances achieved recently, and also due to the emergence of new technologies and new materials. In addition to that, now-a-days the use of new production methods is very diffused due to the nanotechnology and three-dimensional printers.
The biomimetic of the shark skin is one of the most interesting techniques for passive reducing the aerodynamic and hydrodynamic frictions. It consists on the application of grooves along the surface in the direction of the fluid’s flow, since the control of the laminar to turbulent transition regime is achieved more easily. This thesis proposes the application of the biomimetic of the shark skin in land vehicles and its computer simulation by applying the equations of Reynolds Averaged Navier-Stokes (RANS). Using the latest technologies, we can better understand the phenomena associated with the intended effects. Simulating the aerodynamic effect of the shark skin, with the support of computers and appropriate software, we can predict its physical behaviour. This was not possible, for example, in the eighties, when the technology wasn’t so accessible and the processing was reduced. It is important to emphasize that currently there is a revival regarding this matter due to scientific advances achieved recently, and also due to the emergence of new technologies and new materials. In addition to that, now-a-days the use of new production methods is very diffused due to the nanotechnology and three-dimensional printers.
Description
Keywords
Bio Mimetismo da Pele de Tubarão Modelo de Turbulência Redução de Atrito Aerodinâmico Regime Turbulento