ADVANCED FLUID DYNAMICS Edited by Hyoung Woo Oh Advanced Fluid Dynamics Edited by Hyoung Woo Oh Published by InTech Janeza Trdine 9, 51000 Rijeka, Croatia Copyright © 2012 InTech All chapters are Open Access distributed under the Creative Commons Attribution 3.0 license, which allows users to download, copy and build upon published articles even for commercial purposes, as long as the author and publisher are properly credited, which ensures maximum dissemination and a wider impact of our publications. After this work has been published by InTech, authors have the right to republish it, in whole or part, in any publication of which they are the author, and to make other personal use of the work. Any republication, referencing or personal use of the work must explicitly identify the original source. 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Publishing Process Manager Jana Sertic Technical Editor Teodora Smiljanic Cover Designer InTech Design Team First published March, 2012 Printed in Croatia A free online edition of this book is available at www.intechopen.com Additional hard copies can be obtained from orders@intechweb.org Advanced Fluid Dynamics, Edited by Hyoung Woo Oh p. cm. ISBN 978-953-51-0270-0 Contents Preface IX Chapter 1 An Experimental and Computational Study of the Fluid Dynamics of Dense Cooling Air-Mists 1 Jesús I. Minchaca M., A. Humberto Castillejos E. and F. Andrés Acosta G. Chapter 2 Direct Numerical Simulations of Compressible Vortex Flow Problems 21 S.A. Karabasov and V.M. Goloviznin Chapter 3 Fluid Dynamics of Gas – Solid Fluidized Beds 39 Germán González Silva, Natalia Prieto Jiménez and Oscar Fabio Salazar Chapter 4 Fuel Jet in Cross Flow – Experimental Study of Spray Characteristics 59 E. Lubarsky, D. Shcherbik, O. Bibik, Y. Gopala and B. T. Zinn Chapter 5 Influence of Horizontal Temperature Gradients on Convective Instabilities with Geophysical Interest 81 H. Herrero, M. C. Navarro and F. Pla Chapter 6 Internal Flows Driven by Wall-Normal Injection 95 Joseph Majdalani and Tony Saad Chapter 7 Modelling of Turbulent Premixed and Partially Premixed Combustion 135 V. K. Veera, M. Masood, S. Ruan, N. Swaminathan and H. Kolla Chapter 8 Multiscale Window Interaction and Localized Nonlinear Hydrodynamic Stability Analysis 159 X. San Liang Chapter 9 Stability Investigation of Combustion Chambers with LES 183 Balázs Pritz and Martin Gabi VI Contents Chapter 10 Turbulent Boundary Layer Models: Theory and Applications 205 José Simão Antunes do Carmo Chapter 11 Unitary Qubit Lattice Gas Representation of 2D and 3D Quantum Turbulence 239 George Vahala, Bo Zhang, Jeffrey Yepez, Linda Vahala and Min Soe Preface This book is intended to serve as a reference text for presenting a broad range of topics on fluid dynamics to advanced scientists and researchers. The chapters have been contributed by the prominent specialists in the field of fluid dynamics cover experimental and numerical fluid dynamics, aeroacoustics, multiphase flow analysis, convective instability, combustion, and turbulence modeling. Dr. Hyoung Woo Oh Department of Mechanical Engineering, Chungju National University, Chungju, Korea [...]... at z= zs for a W= 0.50 L/s with pa= 257 kPa: (a) experimental, (b) computational and with pa= 320 kPa: (c) experimental, (d) computational 16 Advanced Fluid Dynamics 5 Summary and conclusions A comprehensive experimental and computational study of the fluid dynamics of air-mist jets generated under conditions of interest in the cooling of surfaces found in metallurgical processes and in other high... deformation and break-up behavior Since, for a specified fluid those two parameters, dd and u, determine the local impingement Weber number (Wezs= duzs2dd/), which in general has been agreed to characterize the impact behavior (Wachters & Westerling, 1966; Araki & Moriyama, 1981; Issa & Yao, 2005) As the * Corresponding Author 2 Advanced Fluid Dynamics impingement Weber number increases the drops tend... Impinging on a Flat Plate ISIJ International, Vol 31, No 4, (n.d 1991), pp 342-349, ISSN 0915-1559 An Experimental and Computational Study of the Fluid Dynamics of Dense Cooling Air-Mists 19 Hernández, I., Acosta, F., Castillejos, A & Minchaca, J (2008) The Fluid Dynamics of Secondary Cooling Air-Mist Jets Metallurgical and Materials Transactions B, Vol 39B, No 5, (October 2008), pp 746-763 Hernández, C.,... neighborhood of the nozzle orifice, (c) schematic of assumed air-velocity profiles at nozzle exit and (d) schematic of assumed drop velocity profiles and water flux distribution at nozzle exit 6 Advanced Fluid Dynamics measurements of their impact footprints indicated double symmetry over the x–z and y–z planes the computational domain involved just one quarter of the physical domain, as seen in the... dimensions and parameters lx= 0.01 m; ly= 0.00325 m; lx’= 0.00585 m zs= 0.175 m; = 45°; = 10° *A is computed at local conditions: 25°C, 86 kPa Table 1 Auxiliary equations, properties and dimensions 8 Advanced Fluid Dynamics 3.3 Boundary and initial conditions At the boundaries of the calculation domain shown in Fig 3(a), Eqs (2) through (5) describing the turbulent motion for the air-phase were solved imposing... volumes to achieve mesh independent results and the number of ports was 100×12 in the x-y directions The convergence criterion specified a total residual for all the dependent variables ≤ 10-3 10 Advanced Fluid Dynamics 4 Experimental and computational results and discussion 4.1 Drop velocity and size correlation As indicated in Sec 2 the drop size and velocity measurements were done at 7 sampling volumes... free jet The multivariate effects that the droplet velocity experiences when changing W at constant pa are complex Therefore, it was important to examine the predictions of the CFD model in 12 Advanced Fluid Dynamics this regard Figure 7 shows experimental and computational profiles of the normal and tangential volume weighed mean velocity components defined as, u z ,v N N N N i 1 i 1 i 1 i 1... velocity components as a function of x-position for different pa and constant W Normal velocity components: (a) measured, (b) computed Tangential velocity components: (c) measured, (d) computed 14 Advanced Fluid Dynamics 4.3 Effect of air inlet pressure on droplet volume fraction and water impact flux As mentioned in Sec 1 the mists have been classified in dense or dilute according to the value of the...1 An Experimental and Computational Study of the Fluid Dynamics of Dense Cooling Air-Mists Jesús I Minchaca M., A Humberto Castillejos E.* and F Andrés Acosta G Centre for Research and Advanced Studies – CINVESTAV, Unidad Saltillo Mexico 1 Introduction Spray cooling of a hot body takes place when a dispersion of fine... i, j in, out k max 17 Ambient conditions, P = 86 kPa, T = 25 °C Discretization cell Indexes for coordinate directions Input, output to control volume Ports or trajectories Maximum 18 t T x, y, z Advanced Fluid Dynamics terminal Total Coordinates directions 8 References Araki, K & Moriyama, A (1981) Theory on Deformation Behavior of a Liquid Droplet Impinging onto Hot Metal Surface Transactions of the . ADVANCED FLUID DYNAMICS Edited by Hyoung Woo Oh Advanced Fluid Dynamics Edited by Hyoung Woo Oh Published by. on fluid dynamics to advanced scientists and researchers. The chapters have been contributed by the prominent specialists in the field of fluid dynamics cover experimental and numerical fluid. Advanced Fluid Dynamics, Edited by Hyoung Woo Oh p. cm. ISBN 978-953-51-0270-0 Contents Preface IX Chapter 1 An Experimental and Computational Study of the Fluid Dynamics