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Doctoral Thesis
DOI
https://doi.org/10.11606/T.3.2009.tde-11082010-155259
Document
Author
Full name
Alisson Gomes de Moraes
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2009
Supervisor
Committee
Souza, Podalyro Amaral de (President)
Koide, Sérgio
Martins, José Rodolfo Scarati
Meneghini, Julio Romano
Porto, Rodrigo de Melo
Title in Portuguese
Entropia máxima na modelação do fator de atrito (f) de escoamento forçado.
Keywords in Portuguese
Entropia (matemática aplicada)
Escoamento
Mecânica dos fluidos
Perda de carga
Turbulência
Abstract in Portuguese
Esta tese apresenta um desenvolvimento do fator de atrito (f) para escoamentos incompressíveis. O desenvolvimento é baseado no modelo clássico de Colebrook-White e no recente modelo da Entropia Máxima. Este desenvolvimento pode ser considerado como um modelo conceitual, porém não completamente, por causa do relacionamento entre o número de Reynolds (Re) e o parâmetro de entropia (M) determinado através de ajustes numéricos realizados com bons dados experimentais. Quatro algoritmos de cálculo foram criados para simplificar a aplicação do modelo, evidenciando sua eficácia e a eficiência.
Title in English
Maximum entropy for modeling friction factor (f) from forced flow.
Keywords in English
Flow
Friction factor
Lose energy
Maximum entropy
Universal low
Abstract in English
This thesis presents a development of friction factor (f) for incompressible pipe flow calculation. The development is based on the classical Colebrook-White model and on the recent maximum entropy model. The development cam be considered as a conceptual one, but not completely, because the relationship that links the Reynolds number (Re) to the entropy parameter (M) was determined by numerical fitting on accurate but experimental data. Four calculation algorithms were produced to simplify the model applications, evidencing efficiency and effectiveness.
 
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Publishing Date
2010-09-14
 
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