Friction factor analisys on transient flow

• Rocha, Marcelo Silva ^[1] ; Andrade, J.G.P. ^[1]
  1. [1] Universidade Estadual de Campinas

     Universidade Estadual de Campinas

     Brasil

     
• Localización: Métodos Numéricos en Ingeniería: [Comunicaciones presentadas al IV Congreso de Métodos Numéricos en Ingeniería celebrado en Sevilla durante los días 7-10 de Junio de 1999] / R. Abascal (ed. lit.), José Domínguez Abascal (ed. lit.), G. Bugeda (ed. lit.), 1999, ISBN 84-89925-45-3
• Idioma: español
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• Resumen

  • The reliability of realistic simulations of hydraulic systems depends on how accurate are the predictions of flow, pressure head and frequencies, by numerical models. A major cause of this modeling error lies in the use of quasi-steady friction equation which is only valid for steady flows. This research will compare results obtained of two computing models and physic model applying the elastic method to promote a systematic analysis of efficiency and accuracy made by friction equation uses, which incorporates rate dependent velocity, shear and compressibility effects within a single, generalized framework.