Estudo de velocidades e do número de Reynolds para o descolamento dos mexilhões dourados (Limnoperna fortunei)

Abstract

Limnoperna fortunei, or golden mussel is a shellfish originating from Asia that has been introduced in South America in the 1990s probably by the discharge of ballast water from a merchant ship. Currently, lies in the southern states, Southeast and Midwest of Brazil. The golden mussel has caused impacts both from the point of view of the environmental and economic point of view. One of the biggest economic impacts that may be cited is connected to systems of water supply and water harvesting and hydroelectric. The knowledge of their behavior, their physical characteristics, among others is one of the strategies to articulate efficient procedures to combat this mollusk. Among the characteristics to be known is the speed of detachment of the individual clusters of different substrates. Within this context, the work in question, aims to conduct a study of velocity and Reynolds number requires for the detachment of the mussel substrate. So this work is divided into two lines. At first, based on secondary data from studies conducted in the field with the substrate steel ASTM A36, was obtained Reynolds number needed to promote the pullout golden mussel. The second line of research based on primary data obtained in the laboratory to substrates, steel, wood and rope allowed to be identified speeds and Reynolds number occurs for the detachment of the golden mussel of the respective substrates. The result of the study indicates that it is possible to achieve speeds and Reynolds numbers in systems penstocks. However there needs to be a change in operational existing systems and a change in systems projects still under construction.