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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

[pt] ESTUDO DO ESCOAMENTO DE UM FLUIDO REAL COM DENSIDADE ESTRATIFICADA PASSANDO POR UM OBSTÁCULO / [en] STUDY OF REAL FLUID FLOW WITH DENSITY STRATIFIED THROUGH AN OBSTACLE

LUCIANO MAGNO COSTALONGA VAREJAO 13 August 2012 (has links)
[pt] O objetivo deste trabalho é estudar o comportamento de um fluido real com densidade estratificada quando passa por um obstáculo. A partir das equações gerais da Mecânica dos Fluidos desenvolvida para vorticidade e função de corrente, obtém-se duas equações diferenciais parciais ambas elípticas, constituindo o modelo matemático do escoamento. O método numérico TUBE AND TANK, desenvolvido por Gosman et al. (1), análogo ao das diferenças finitas, é utilizado para transformar as equações diferenciais em equações algébricas. As condições de contorno necessárias ao problema foram tais que o escoamento estudado se tornou idêntico àquele analisado por Forchtgott(3). Com o auxílio de um computador IBM/370 foi possível obter os resultados que estão de acordo com as observações de Forchtgott(3). / [en] The main purpose of this work is to study the behavior of the real density stratified fluid flowing over an obstacle. From the general equations of fluid mechanics developed in terms of vorticity and stream functions two elliptical partial differential equations which constitute the mathematical flow model were obtained. The numerical method TUBE AND TANK, developed by Gosman et al. (1), analogous to the finite differences method, was used to transform the partial differential equations into algebraic equations. The boundary conditions used in the problem were such that the flow was indentical to that analyzed by Forchtgott(3). Using an IBM/370 computer it was possible to obtain the resultswhich are in agreement with those observed by Forchtgott(3).

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