Livro: Escoamento MULTIfásico

Organizador: Oscar M. H. Rodriguez (EESC/USP)

Editor: ABCM - Associação Brasileira de Engenharia e Ciências Mecânicas

Autores: Angela O. Nieckele (PUC-Rio), Antonio C. Bannwart (UNICAMP), Arlindo de Matos (PETROBRAS), Carlos Magno Bezerra de Medeiros Nascimento (PETROBRAS), Christian C. Milioli (EESC/USP), Cristiane Cozin (UTFPR), Fernando A. França (UNICAMP), Fernando E. Milioli (EESC/USP), Jader R. Barbosa Jr. (UFSC), Oscar M. H. Rodriguez (EESC/USP), Paulo Seleghim Júnior (EESC/USP), Rigoberto E. M. Morales (UTFPR).

"Obra indispensável para quem quer compreender escoamentos multifásicos, incluindo princípios básicos, instrumentação, simulação numérica computacional, transferência de calor e aplicações na indústria de petróleo."

Site: http://www.abcm.org.br/publicacoes-abcm/lancamentos

Stepped Spillways: Theoretical, Experimental and Numerical Studies

André Luiz Andrade Simões, Harry Edmar Schulz, Raquel Jahara Lobosco

and Rodrigo de Melo Porto

Source: Hydrodynamics - Natural Water Bodies
ISBN 978-953-307-893-9
Edited by: Harry Edmar Schulz, André Luiz Andrade Simões and Raquel Jahara Lobosco
Publisher: InTech, January 2012

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Multiphase analysis of entrained air in skimming flows along stepped chutes

H. E. Schulz, R. J. Lobosco, A. L. A. Simões

Abstract: Self-aeration is a predominant phenomenon of flows along stepped chutes. While the steps increase the energy dissipation rate, they also increase the air uptake, reducing risks of cavitation. Although aeration is a known phenomenon, a definitive quantification of the profile of the air-water mixture is still not available. This study considers the skimming flow regime, and a theoretical solution for the profile of the air-water mixture, based on the one-dimensional mass conservation equation and on a proposal for the air transfer between the atmosphere and the water. The numerical aeration of the flows along stepped chutes is investigated for chutes with uniform steps. The open softwares Salome and OpenFoam® were used  for mesh generation and CFD calculations, respectively. The flows are inherently turbulent and their characteristics were investigated here using a two equation k-e turbulence model and adequate wall functions for the wall boundaries.

University of Liège, Liège, Belgium

ACOMEN 2011 (5th Interntional Conference on Advanced Computational Methods in Engineering)

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Hydrodynamics - Optimizing Methods and Tools

Edited by: Harry Edmar Schulz, André Luiz Andrade Simões and Raquel Jahara Lobosco

ISBN 978-953-307-712-3, Hard cover, 420 pages
Publisher: InTech
Publication date: October 2011
Subject: Mechanical Engineering

The constant evolution of the calculation capacity of the modern computers implies in a permanent effort to adjust the existing numerical codes, or to create new codes following new points of view, aiming to adequately simulate fluid flows and the related transport of physical properties. Additionally, the continuous improving of laboratory devices and equipment, which allow to record and measure fluid flows with a higher degree of details, induces to elaborate specific experiments, in order to shed light in unsolved aspects of the phenomena related to these flows. This volume presents conclusions about different aspects of calculated and observed flows, discussing the tools used in the analyses. It contains eighteen chapters, organized in four sections: 1) Smoothed Spheres, 2) Models and Codes in Fluid Dynamics, 3) Complex Hydraulic Engineering Applications, 4) Hydrodynamics and Heat/Mass Transfer. The chapters present results directed to the optimization of the methods and tools of Hydrodynamics.

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Timeline: Stepped Spillways and Computational Fluid Dynamics