Um modelo constitutivo para o escoamento através de um arranjo de barras de seção circular

The determination of the flow through a uniform array of rod bundle is made by means of the Continuum Theories of Mixtures, which gives balance equations for the system. The hypotheses of isothermal and fully developed turbulent flow are made. Constitutive equations for the resistive force are determined from Jakob's and Rowe's correlations, and its behaviour analysed for a standard case. Comparison of these equations with Bottgenbach's experiments shows good agreement of the direction of the pressure, although direct comparison between present theory and his theory is not possible. For the confirmation of the model an experiment is performed, this consisting of measuring pressure drop (Euler's Number) in the axial and transverse direction of a random array rod bundle at various angles as functions of velocity (Reynold's Number), which has good agreement, except on axial direction. At last, a sample problem is formulated with the purpose of showing the applicability of the model, this being the determination of pressure field dueto the influence of a baffle.

Grantor dc:publisher

Universidade Federal do Rio de Janeiro

Year dc:date.issued

1979

Author dc:creator

• Möller, Sergio Viçosa

Advisor dc:contributor.advisor

• Qassim, Raad Yahya

• Dinâmica dos fluídos
• Escoamento multifásico
• Fenômenos de transporte

Statement dc:rights

• Acesso Aberto

Language dc:language

por

Handle dc:identifier.uri

http://hdl.handle.net/11422/3601

OAI identifier oai:identifier

oai:pantheon.ufrj.br:11422/3601