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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Propagação de ondas de maré em canais comunicando-se com um reservatório

Sarmento, Robson 05 1900 (has links)
Submitted by Fatima Fonseca (fatima.fonseca@sibi.ufrj.br) on 2017-06-22T16:32:14Z No. of bitstreams: 1 000753010.pdf: 1456804 bytes, checksum: c5510809cd96077e1dc94d206e6d28b0 (MD5) / Made available in DSpace on 2017-06-22T16:32:14Z (GMT). No. of bitstreams: 1 000753010.pdf: 1456804 bytes, checksum: c5510809cd96077e1dc94d206e6d28b0 (MD5) Previous issue date: 1971-05 / Estudo do fenômeno resultante da propagação de marés em interior de canais comunicando-se com um reservatório. A passagem da onda oceânica na foz de um canal, origina uma onda que se propaga dentro do canal. Três teorias são aplicadas para este fenômeno: 1- A onda propagada é considerada uma onda de translação, propagando-se de acordo com certas leis conhecidas. O problema é tratado sob o ponto de vista da dissipação de energia da onda pelo atrito dentro dos limites do canal; 2- As equações das ondas longas são consideradas (continuidade e movimento). As equações são resolvidas através método diferenças-finitas explícito; 3 - As equações das ondas longas são solucionadas através método diferenças-finitas implícito. De acordo com cada uma das teorias, são calculadas as velocidades e alturas para o canal do porto de Laguna. Os resultados são confrontados com dados observados no mesmo local. Tendo em vista os bons resultados obtidos por ambas teorias (1 e 2), concluímos que elas são aplicáveis com êxito na simulação das velocidades e alturas no canal, sob condições idênticas as do problema aqui tratado. / Study of the resulthing phenomena of the propagation of tides in Inland channels, which are in close communication with a reservoir. The passage of the ocean tidal wave in front of the mouth of a channel, sets up therein a wave, which is propagated into the channel. Three theories are presented to study this phenomenon: 1- The propagated wave is considered a wave of translation, and this propagation obeys the well known laws. The problem is dealth with by considering the expenditure of the wave energy, by friction within the limits of the channel; 2- The equations of continuity and motion of longwaves were taken into consideration in this case. The solution of these equations is treated with explicite finite-difference method; 3- The equations of long waves are solved with implicit finite-difference method. The velocity and the height for the channel of Laguna's for are calculated according each one of these theories. The results were checked those, previously observed, at the same place. If we take into consideration the good results presented by both theories (1 and 2), we conclude that they can be successifuly applied on the simulation of the velocity and height in the channel, under identycal conditions we have in the problem, here discussed.

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