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- Laboratory fire spread analysis using visual and infrared imagesPublication . Martínez-de Dios, J. Ramiro; André, Jorge C.; Goncalves, J. C.; Arrue, Begoña Ch.; Ollero, Aníbal; Viegas, Domingos X.This paper presents an experimental method using computer-based image processing techniques of visual and infrared movies of a propagating fire front, taken from one or more cameras, to supply the time evolutions of the fire front shape and position, flame inclination angle, height, and base width. As secondary outputs, it also provides the fire front rate of spread and a 3D graphical model of the fire front that can be rendered from any virtual view. The method is automatic and non-intrusive, has space–time resolution close to continuum and can be run in real-time or deferred modes. It is demonstrated in simple laboratory experiments in beds of pine needles set upon an inclinable burn table, with point and linear ignitions, but can be extended to open field situations
- Laboratory fire spread analysis using visual and infrared imagesPublication . Martínez-de Dios, J. Ramiro; André, Jorge C.; Goncalves, J. C.; Arrue, Begoña Ch.; Ollero, Aníbal; Viegas, Domingos X.This paper presents an experimental method using computer-based image processing techniques of visual and infrared movies of a propagating fire front, taken from one or more cameras, to supply the time evolutions of the fire front shape and position, flame inclination angle, height, and base width. As secondary outputs, it also provides the fire front rate of spread and a 3D graphical model of the fire front that can be rendered from any virtual view. The method is automatic and non-intrusive, has space–time resolution close to continuum and can be run in real-time or deferred modes. It is demonstrated in simple laboratory experiments in beds of pine needles set upon an inclinable burn table, with point and linear ignitions, but can be extended to open field situations.
- Estudo experimental e numérico do escoamento de um jacto plano originado por um dispositivo de cortina de arPublication . Goncalves, J. C.; Costa, José; Figueiredo, A. Rui; Lopes, AntónioNos domínios comercial ou industrial, são muito utilizadas barreiras aerodinâmicas – designadas por cortinas de ar – para confinar ambientes específicos. Neste trabalho apresenta-se o estudo experimental do jacto originado por um equipamento de cortina de ar. Recorrendo à Mecânica de Fluidos Computacional (CFD, foi também realizado um estudo numérico - 3D. Os resultados obtidos por ambas as vias, experimental e numérica, permitiram a caracterização detalhada do escoamento do jacto, sendo coerentes com o esperado para o problema físico em estudo, e coerentes entre si. Um dos aspectos interessantes observados nos ensaios experimentais, foi que o nível de turbulência inicial do jacto se situou sempre abaixo dos 5%, para as diferentes velocidades impostas ao jacto, o que confirma um bom projecto do bocal de descarga