Recent Advances in Fluid Mechanics and Aerodynamics
Proceedings of the 7th IASME / WSEAS International Conference on FLUID MECHANICS and AERODYNAMICS (FMA '09)
Moscow, Russia August 20-22, 2009
WSEAS Mechanical Engineering Series A Series of Reference Books and Textbooks
Published by WSEAS Press ISSN: 1790-5095
ISBN: 978-960-474-106-9
www.wseas.org
Recent Advances in Fluid Mechanics and Aerodynamics
Proceedings of the 7th IASME / WSEAS International Conference on FLUID MECHANICS and AERODYNAMICS (FMA '09)
Moscow, Russia August 20-22, 2009
WSEAS Mechanical Engineering Series A Series of Reference Books and Textbooks
Published by WSEAS Press www.wseas.org
Copyright © 2009, by WSEAS Press
All the copyright of the present book belongs to the World Scientific and Engineering Academy and Society Press. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of the Editor of World Scientific and Engineering Academy and Society Press.
All papers of the present volume were peer reviewed by two independent reviewers. Acceptance was granted when both reviewers' recommendations were positive.
See also: http://www.worldses.org/review/index.html
ISSN: 1790-5095
ISBN: 978-960-474-106-9
World Scientific and Engineering Academy and Society
Recent Advances in Fluid Mechanics and Aerodynamics
Proceedings of the 7th IASME / WSEAS International Conference on FLUID MECHANICS and AERODYNAMICS (FMA '09)
Moscow, Russia
August 20-22, 2009
Editors:
Prof. Siavash H. Sohrab, Northwestern University, USA Prof. Haris J. Catrakis, University of California, USA Dr. Nikolai Kobasko, IQ Technologies Inc, USA
International Program Committee Members:
Kenzu Abdella, CANADA Roman Adinberg, ISRAEL
Coman Adrian-Viorel, ROMANIA Jerome Anthoine, BELGIUM Michael Aronov, UNITED STATES
Mohammadmasoud Azhdari moghaddam, IRAN Regita Bendikiene, LITHUANIA
Helmut Benigni, AUSTRIA A. C. Benim, GERMANY
Friedrich-Karl Benra, GERMANY Stasys Bockus, LITHUANIA
Hermenegildo Borges de Oliveira, PORTUGAL Mircea Boscoianu, ROMANIA
Malek Bouhadef, ALGERIA Andris Buikis, LATVIA Adriana Catanase, ROMANIA Costin Cepisca, ROMANIA Claudia Cherubini, ITALY
Ashfaque Ahmed Chowdhury, AUSTRALIA J. P. Curtis, UK
Farhang Daneshmand, IRAN George Darie, ROMANIA Konrad Domke POLAND Michel El Hayek, LEBANON Tayfour Elbashir, OMAN Arpad Fay, HUNGARY Petr Filip, CZECH REPUBLIC Nicolas Galanis, CANADA Sergey Gaponov, RUSSIA Aitor J. Garrido, SPAIN majid Ghassemi, IRAN
Yury Gogotsi, UNITED STATES Jonas Gyly,USA
Vasileios Hamosfakidis, UNITED STATES Assia Helali, FRANCE
Jun Huang, FINLAND
Dagmar Janacova, CZECH REPUBLIC Mak Kai Long, HONG KONG S.A.R.
X.Kakatsios, GREECE
Bouhadef Khedidja, ALGERIA Jaewon Kim, KOREA
Karel Kolomaznik, CZECH REPUBLIC Pavel Kuibin, RUSSIA
Albert Kurbatskiy, RUSSIA T.-W. Lee, UNITED STATES V. C. Loukopoulos, GREECE Fathi Mahfouz, EGYPT D. S. Mathioulakis, GREECE
Mohamed Maidi, UNITED KINGDOM Elena Martin, SPAIN
Sushanta K Mitra, INDIA
Dawid Myszka, POLAND Santirat Nansaarng, THAILAND Jiri Neustupa, CZECH REPUBLIC Cong Tam Nguyen, CANADA Guillermo Paniagua, BELGIUM Thales Papazoglou, GREECE Sophia Psychoudaki, GREECE Yulia Peet, FRANCE
Guillaume Polidori, FRANCE Jiri Pospisil, CZECH REPUBLIC Thomas Prevenslik, GERMANY Robert Pucher, AUSTRIA Mohammad Rasul, AUSTRALIA Mourad Rebay, FRANCE
Constantin Rotaru, ROMANIA Gilles Roy, CANADA
Saeed-Reza Sabbagh-Yazdi, IRAN M. Sakellariou-Makrantonaki, GREECE Lamberto Tronchin, ITALY
Martin van den Toorn, THE NETHERLANDS Heimo Walter, AUSTRIA
Ying Wang, CHINA
Dirk Weltersbach, GERMANY
Henning Zindler, GERMANY
Preface
This year the 7th IASME / WSEAS International Conference on FLUID MECHANICS and AERODYNAMICS (FMA '09) was held in Moscow, Russia, in August 20-22, 2009. The Conference remains faithful to its original idea of providing a platform to discuss mathematical modeling in fluid mechanics, simulation in fluid mechanics, multiphase flow, boundary layer flow, fluid structure interaction, hydrotechnology, hydraulic and thermal turbomachines, hydrodynamics, adiabatic flow, non steady flow, wave modeling etc. with participants from all over the world, both from academia and from industry.
Its success is reflected in the papers received, with participants coming from several countries, allowing a real multinational multicultural exchange of experiences and ideas.
The accepted papers of this conference are published in this Book that will be indexed by ISI.
Please, check it: www.worldses.org/indexes as well as in the CD-ROM Proceedings. They will be also available in the E-Library of the WSEAS. The best papers will be also promoted in many Journals for further evaluation.
A Conference such as this can only succeed as a team effort, so the Editors want to thank the International Scientific Committee and the Reviewers for their excellent work in reviewing the papers as well as their invaluable input and advice.
The Editors
Table of Contents
Plenary Lecture 1: Modeling and Simulation of Inhomogeneous Stratified Turbulent Flows 12 Albert F. Kurbatsky
Plenary Lecture 2: Role of Flow Non-Parallelism in the Excitation and Amplification of
Disturbances in a Supersonic Boundary Layer 13
Sergey A. Gaponov
Plenary Lecture 3: Application of Simulation Methods Considering the Interaction between Fluid and Structure
14
F.-K. Benra
Plenary Lecture 4: The Smoothed Particle Hydrodynamics Method in Computational Fluid Dynamics
15
John S. Anagnostopoulos
Development of Summer Thermocline in the Persian Gulf 17
Seyed Majid Mosaddad, Abbasali Akbari Bidokhti, Hooshang Bassirparsa, Farhang Ahmadi Givi, Ali Karami Khaniki
Flow-Induced Instability and Bifurcation of Carbon Nanotubes 21 X. Q. He, Y. Yan, L. X. Zhang
Nonlinear Group Interactions of the Taylor-Goertler Disturbances in Supersonic Axisymmetric Jets
28
N. M. Terekhova
Evaluation of Seepage Problem Under a Concrete Dam With Finite Volume Method 34 A. Shamsai, E. Abdi Dezfuli, A. Zebardast
Certain Periodic Flows Associated with Solutions of Hill Equation 41 Siavash H. Sohrab, Gabriella Bognar
About Stability Experiments of Supersonic Boundary Layer on SWEPT Wing 49 Nickolay Semionov, Alexander Kosinov, Yury Yermolaev
Solving the Thermal Boundary Layer with Heat Flux Estimation Around an Elliptical Body 55 Mustafa B. Al-Hadithi
Computational Investigation into the Performance of Gas Turbine Preswirl Cooling Systems 62 M. Cagan, A. C. Benim, D. Gunes
Linear Stability of Supersonic Boundary Layer on Porous Surface 68 S. A. Gaponov, B. V. Smorodsky
A Mathematical Formulation and Solution of the Optimized Wing Aero-Structural Problem 74 Stephen Akwaboa, Frederick Ferguson, Patrick Mensah
Aerodynamic Characteristics of High Speed Train Pantograph with the Optimized Panhead Shape
84 Yeongbin Lee, Joohyun Rho, Minho Kwak, Jaeho Lee, Kyuhong Kim, Dongho Lee
Proceedings of the 7th IASME/WSEAS International Conference on FLUID MECHANICS and AERODYNAMICS
ISSN: 1790-5095 9 ISBN: 978-960-474-106-9
On the Pulsation Decomposition of Supersonic Flow for Natural and Controlled Conditions of Experiments
89
Yu. G. Yermolaev, A. D. Kosinov, N. V. Semionov, S. N. Tagaev, A. I. Semisynov
On Artificial Disturbances Development in Spanwise Modulated Supersonic Boundary Layer at Mach 2
94
A. D. Kosinov, A.V. Panina, N. V. Semionov, Yu. G. Yermolaev
The Flow Characteristics in a Sink-Swirl Flow within two Disks 101 Ali M. Jawarneh
Numerical Study of Free Surface Flow Based Solver VOF Method in the Moving Floor Liquid Container
107
Ronak Ghandriz, Mohsen Goudarzi
Application of Simulation Methods Considering the Interaction Between Fluid and Structure 116 Friedrich-Karl Benra, Hans Josef Dohmen
Drag Characteristics of a Pickup Truck According to the Bed Geometry 122 Jongsoo Ha, Shigeru Obayashi, Yasuaki Kohama
Microfluidic Analysis of a Micro-Mixer with an Oscillating Stirrer 128 Min-Gyu Im, Jae-Yong Park, Young-Kyu Oh, Jae-Yong Park, Yong-Dae Kim
Universality of a Scale Invariant Model of Turbulence and its Quantum Mechanical Foundation 134 Siavash H. Sohrab
A Particle-Scale Model of Hydrodynamic Erosion 141
Maynard Marrion, Andy Woods
Development and Investigation of a Non-Isotropic K-Ε Turbulence Model for Horizontal Gravity
Currents Applications 150
A. Majid Bahari, Kourosh Hejazi
A Comparative Numerical Study of the Modified Versus the Navier-Stokes Equations of Motion 157 Bo Wan, Friedrich K. Benra, Siavash H. Sohrab
Different Flow Regimes and Test Facility Constructions Impact on a Stable Low Air Velocity Value Reproduction
163
Agne Bertasiene, Vytautas Janusas
The Influence of an Initial Impeller on Operation Parameters and Performance Characteristics of a High-Speed Pump with Radial Blades
170
Andrzej Wilk
Secondary Flow in a Mushy Layer 174
D. N. Riahi
Analytical Study for Hypersonic Flow Past A Triangular Cone Via Perturbation Method 178 Nasrin Sheikhy, Asghar B. Rahimi
Analyzing the Cross Section Effect of Hypersonic Flow Past a Conical Body Via Perturbation Method
182 Nasrin Sheikhy, Milad Bahrami, Asghar.B. Rahimi
Proceedings of the 7th IASME/WSEAS International Conference on FLUID MECHANICS and AERODYNAMICS
ISSN: 1790-5095 10 ISBN: 978-960-474-106-9
Modeling and Simulation of Stably Stratified Turbulence: An Improved Rans-Approach for Boundary Layer Flows
188
L. I. Kurbatskaya, A. F. Kurbatskiy
Passive Control of Annular Jet Instabilities Studied by Proper Orthogonal Decomposition. 196 A. Danlos, E. Rouland, P. Paranthoen, B. Patte-Rouland
On Existence and Uniqueness of the Cauchy Problem for Parabolic Equations with Unbounded
Coefficients 202
Huashui Zhan
On the Time-Periodic Solutions of A Quasilinear Degenerate Parabolic Equation 212 Huashui Zhan, Long Li
Application of the Lattice Boltzmann Method to Steady Incompressible Laminar High Re Flows 220 A. C. Benim, E. Aslan, I. Taymaz
Analytical Solution for Supersonic Flow on a Conical Body of Rounded Triangle Cross Section via the Perturbation Method
226
M. Bahrami, A. B. Rahimi, N. Shekhi, A. R. Bahrami
The Simulation of Fluid-Structure Interaction Using Fully Implicit Coupled Solvers 233 Marius Stoia-Djeska, Carmen-Anca Safta
Authors Index 240
Proceedings of the 7th IASME/WSEAS International Conference on FLUID MECHANICS and AERODYNAMICS
ISSN: 1790-5095 11 ISBN: 978-960-474-106-9
Plenary Lecture 1
Modeling and Simulation of Inhomogeneous Stratified Turbulent Flows
Professor Albert F. Kurbatsky
Khristianovich Institute of Theoretical and Applied Mechanics Russian Academy of Sciences, Siberian Branch and
Novosibirsk State University, Russia, Novosibirsk Email: kurbat@nsu.ru
Abstract: The modeling and simulation of the planetary boundary layer over land is a persistent, problematic feature in weather, climate, pollutant dispersion, and air quality topics. Planetary boundary layers are usually classified into three types: neutral, convective, and stable, based on its stability: buoyancy effects and the dominant mechanism of turbulence generation. Stable boundary layer turbulence has inevitable difficulties in numerical simulations (arising from small scales of motion due to stratification) and to the intrinsic complexity in its dynamics, e.g., occurrences of intermittency, Kelvin-Helmholtz instability, gravity waves, low-level jets, meandering motions, etc. Therefore is not surprising that today there is a general consensus among researches that our understanding of stable boundary layer (especially the very stable regime) is quite poor and even small future advances justify more work. To improve parameterization of stable boundary layer turbulence in this study is used so-called RANS approach for obtaining, nonlocal on-being, anisotropic expressions for turbulent fluxes of momentum and scalar. Numerical modeling of boundary layer evolution in all range from the convective to a stable state shows that such improved parameterization of turbulence allows to obtain for very stable regime (Richardson's number more than 0.25) that the turbulent Prandtl number stability dependent from the gradient Richardson's number (the result fixed by the laboratory measurements) that allows momentum to be transported by the internal waves, while heat diffusion is impeded by the stratification.
This improvement alleviates the problem of over prediction of heat diffusion under stable conditions, which is a characteristic of conventional boundary-layer schemes, such as the Medium Range Forecast (MRF) employed in the mesoscale models such as the Penn State/NCAR Mesoscale Model (MM5).
Brief Biography of the Speaker: The modeling and simulation of the planetary boundary layer over land is a persistent, problematic feature in weather, climate, pollutant dispersion, and air quality topics. Planetary boundary layers are usually classified into three types: neutral, convective, and stable, based on its stability: buoyancy effects and the dominant mechanism of turbulence generation. Stable boundary layer turbulence has inevitable difficulties in numerical simulations (arising from small scales of motion due to stratification) and to the intrinsic complexity in its dynamics, e.g., occurrences of intermittency, Kelvin-Helmholtz instability, gravity waves, low-level jets, meandering motions, etc. Therefore is not surprising that today there is a general consensus among researches that our understanding of stable boundary layer (especially the very stable regime) is quite poor and even small future advances justify more work. To improve parameterization of stable boundary layer turbulence in this study is used so- called RANS approach for obtaining, nonlocal on-being, anisotropic expressions for turbulent fluxes of momentum and scalar. Numerical modeling of boundary layer evolution in all range from the convective to a stable state shows that such improved parameterization of turbulence allows to obtain for very stable regime (Richardson's number more than 0.25) that the turbulent Prandtl number stability dependent from the gradient Richardson's number (the result fixed by the laboratory measurements) that allows momentum to be transported by the internal waves, while heat diffusion is impeded by the stratification. This improvement alleviates the problem of over prediction of heat diffusion under stable conditions, which is a characteristic of conventional boundary-layer schemes, such as the Medium Range Forecast (MRF) Professor Albert Kurbatsky received Master Sc degree in Physics from the Novosibirsk State University, Russia, in 1963. He obtained Ph.D. degree and then DSc (Phys. and Math.) degree from the Institute of Thermophysics of Russian Academy of Sciences, Siberian Branch, Russia, Novosibirsk, in 1975 and 1985, respectively. He is a Professor at the Department of Physics at the Novosibirsk State University, Russia, Novosibirsk and he is the Principal Scientific Researcher at the Khristianivich Institute of Theoretical and Applied Mechanics of Russian Academy of Sciences, Siberian Branch, Russia, Novosibirsk. Prof. Kurbatsky’s research work & interest include studies in modeling and simulation of complex turbulent flows in environment with application to the planetary boundary layer, in particular. He is author of over 160 publications mostly published in rigorously referred journals. He is author of two monographies on the turbulence modeling.employed in the mesoscale models such as the Penn State/NCAR Mesoscale Model (MM5).
Proceedings of the 7th IASME/WSEAS International Conference on FLUID MECHANICS and AERODYNAMICS
ISSN: 1790-5095 12 ISBN: 978-960-474-106-9
Plenary Lecture 2
Role of Flow Non-Parallelism in the Excitation and Amplification of Disturbances in a Supersonic Boundary Layer
Professor Sergey A. Gaponov
Khristianovich Institute of Theoretical and Applied Mechanics (ITAM) SB RAS, 630090, Novosibirsk, RUSSIA
E-mail: gaponov@itam.nsc.ru
Abstract: The receptivity of external waves and instability of a supersonic boundary layer is considered. It is well known that unstable hydrodynamic waves can be excited by external waves in both subsonic and supersonic flows. It has also been established that for linear interactions of monochromatic waves with laminar flow the excitation is possible only in nonparallel streams. The distinguishing characteristic in the generation mechanism of the unstable waves by sound for subsonic and supersonic flows is as follows: For fixed frequency and low velocities, the parameter values of sound waves differ considerably from those of unstable waves. The effective generation of Tollmien-Schlichting (T.-S.) waves takes place only in the presence of a strong non-homogeneity, e.g., roughness or the leading edge of the model. However in the case of supersonic flow both wave parameters are similar. This fact has two consequences. First of all the sound phase velocity can coincide with the flow velocity in the boundary layer, and a critical layer appears which leads to strong oscillations in the boundary layer. Second because sound and T.-S.
waves have similar characteristics their parameters become indistinguishable in nonparallel flow. Thus effective transmission of oscillatory energy from sound waves into eigen-oscillations takes place. In this paper both the interaction of external waves with parallel flow and the possible excitation of eigen-oscillations in nonparallel flow are considered in linear approach.
The second way of eigen-oscillations excitation is connected with the non-linear disturbances interaction. In particular two problems are discussed. In one of them influence of acoustic disturbances wind tunnel on generation of amplified waves in the modal boundary layer is studied. In the second example Tollmien-Schlichting waves generation by another frequency disturbances is investigated.
This work has been financially supported by the RFBR (Grant No. 08-01-00038a)
Brief Biography of the Speaker: Field of research: Fluid dynamics, laminar- turbulent transition in wall-bounded shear layers.
Surname: Gaponov First name: Sergey Date of birth: August 20, 1940
Affiliation: Laboratory wave processes in supersonic viscous flows, Institute of Theoretical and Applied Mechanics of Siberian Branch of Russian Academy of Science (ITAM SB RAS); Professor at the Department of Theoretical Mechanics, Novosibirsk State University of Architecture and Civil Engineering (NSUACE).
Address: Institutskaya Street, 4/1, 630090 Novosibirsk, Russia
Phone: +7(383)3301228, Fax: +7(383)330726 E-mail: gaponov@itam.nsc.ru
Education: Graduated from Physics Department of Novosibirsk State University (NSU), 1964.
Brief description of professional career (including the title of the dissertation work, the year and the Institution where it has been defended):
1. Junior and Senior Scientific Researcher, Head of Laboratory of the Institute of Theoretical and Applied Mechanics SB RAS, January 1965 – till now.
2. Professor at the Department of Theoretical Mechanics, Novosibirsk State University of Architecture and Civil Engineering (NSUACE), 1992-till now.
Ph.D. Thesis: "Stability of the Incompressible Boundary Layer on a Permeable Surface", 1971, Institute of Theoretical and Applied Mechanics of Siberian Branch of Russian Academy of Science (ITAM SB RAS).
Degree of Doctor (Physics and Mathematics): «Development of disturbances in a supersonic boundary layer», 1987, Moscow Physical-Technical Institute.
Other fields: Member of Council on Defence of doctoral Thesis’s at Institute of Theoretical and Applied Mechanics, Member of Russian National Committee on Theoretical and Applied Mechanics, Prize-Winner of Professor Joukovski List of recent grants for fundamental research: Grant of International Science and Technology Center: ISTC-128-96 (1996-1999, investigator). Grants of Russian Foundation for Basic Research (1994-95, 1996-98, 1999-01, 2002-04, 2005-07, 2008-10, team leader.)
Publications: Number of communications to scientific meetings exceed hundred. Number of papers in refereed journals is more than130. Two books were published.
Proceedings of the 7th IASME/WSEAS International Conference on FLUID MECHANICS and AERODYNAMICS
ISSN: 1790-5095 13 ISBN: 978-960-474-106-9
Plenary Lecture 3
Application of Simulation Methods Considering the Interaction between Fluid and Structure
Professor F.-K. Benra University of Duisburg-Essen Faculty of Engineering Sciences
Institute of Energy and Environmental Engineering University of Duisburg-Essen
Chair for Turbomachinery Lotharstr. 1, 47057 Duisburg, Germany
E-mail: friedrich.benra@uni-due.de
Abstract: Many processes in nature and technology can be described only by using laws and equations from different physical disciplines. Such examples, for which the arising sub-problems cannot be solved independently, are called multi-physics applications. A very important class of these multi-physics problems are the fluid-structure- interactions (FSI), which are characterized by the fact, that the flow around a body has a strong impact on the structure and/or on the movement of the body and the modification of the structure or the position of the body or a component of the body due to the flow has an influence on the flow which is not negligible. The two disciplines which are involved in this kind of multi-physics problems are the fluid dynamics and the structure dynamics which both can be described by the relations of continuum mechanics.
Examples of FSI exist in many fields of the natural sciences and the technology. Solutions for the mathematical description of fluid structure interactions can be obtained only by numerical simulations, which still today are a big challenge of scientific computation.
In this contribution initially the fundamental relations for the calculation of the flow behavior and of the structure dynamics will be presented and approaches for numerical solutions of coupled FSI-systems will be pointed out.
Afterwards different kinds of coupling methods for the two disciplines and possible methods of partitioning of the numerical simulations are described in detail and evaluated regarding the dependence of the two disciplines from each other. A detailed discussion of solutions for several FSI-examples together with a comparison to experimental results brings this contribution to conclusion.
Brief Biography of the Speaker: Prof. Dr.-Ing. Benra graduated with a diploma degree in Mechanical Engineering at University of Duisburg in 1979. Afterwards he was working as a research assistant at the University of Duisburg and he obtained his doctor degree in Mechanical Engineering in the field of Turbomachinery in 1986. From 1986 to 1989 he was chief of the department for design and development of radial compressors at Mannesmann Demag Company and from 1989 to 1993 he was chief of department for research and development of centrifugal pumps at company Pleiger. Since 1993 he is full Professor for Mechanical Engineering at University of Duisburg-Essen in the field of Turbomachinery and since 2002 he is the head of the Chair for Turbomachinery at University of Duisburg-Essen, Germany. His area of expertise in teaching are: Thermofluid Engineering and Energy Conversion in all kinds of Turbomachines. His current research topics are: Numerical and experimental investigation of time-variant flow in Turbomachines (rotor/stator interaction, fluid/structure interaction, unsteady flow in all kinds of cavities, flow along rough or structured surfaces).
Proceedings of the 7th IASME/WSEAS International Conference on FLUID MECHANICS and AERODYNAMICS
ISSN: 1790-5095 14 ISBN: 978-960-474-106-9
Plenary Lecture 4
The Smoothed Particle Hydrodynamics Method in Computational Fluid Dynamics
Assistant Professor John S. Anagnostopoulos School of Mechanical Engineering National Technical University of Athens 9 Heroon Polytechniou ave., Zografou 15780, Athens
Greece
E-mail: anagno@fluid.mech.ntua.gr
Abstract: Mesh-free methods are gaining in popularity since they are both computationally and numerically efficient, as well as easy to implement and use even in complex problems difficult for traditional grid-based methods. In particle methods a continuous field is represented by sum of weighting functions centered on particles, and the physical properties of the medium are smoothed over some physical length.
The Smoothed Particle Hydrodynamics (SPH) method was originally developed in 1977 for the simulation of stars and asteroids movement in astrophysics, by Bob Gingold and Joe Monaghan, and independently by Leon Lucy. It is a powerful mesh-free particle method, which employs a representative number of discrete particles that span a dynamic mesh used to discretize and solve the continuum equations. A smoothing kernel function is introduced to sum up an approximate value of the field functions from the surrounding particles.
Since its inception, the method has been applied for the simulation of many problems in different areas, including solid, soft and granular materials, and fluid flows. Important industrial applications range from medical training, machinery and vehicle simulators, to special effects for movies and electronic games. To some researchers it might constitute the next generation simulator to replace finite element method and affect strongly the computational field.
SPH method is now commonly used in computational fluid dynamics (CFD) and appears to be promising for the reproduction of very complex and even extreme flow conditions. The fluid flow equations are replaced by particle motion equations and the particles move with the fluid, approximating the continuous flow field. Starting from general dynamic fluid flows, SPH has been used to simulate floating bodies, breaking waves, fluid-structure interaction, shock wave phenomena, explosions etc., and appears to be ideal for unsteady or transient multi-phase flows with moving boundaries and interfaces.
However, there are several points that need further development and certain problems that have to be addressed, like the numerical instabilities under some conditions, the reduced accuracy of the computed pressure field, the application of solid boundary conditions, and the turbulence modelling in complex flows. Moreover, the large number of particles required in 3D simulations entails large number of interactions thus increasing computational demands.
For specific applications SPH can be more computationally expensive than the grid-based Navier-Stokes solvers.
The presentation contains the fundamentals of SPH theory, a brief review of recent applications in fluid dynamic problems, and some current research directions for further development.
Brief Biography of the Speaker: John Anagnostopoulos is assistant professor in the School of Mechanical Engineering at the National Technical University of Athens (NTUA), Greece. He received his BS in Mechanical Engineering (1985), and his Ph.D. in Computational Fluid Mechanics (1991) from the NTUA. He worked for several years as principal researcher in various research projects and as R&T consultant. He specialized in the numerical modelling of the flow field and flow mechanisms in various industrial and physical processes, including pulverized coal combustion, fouling, coal grinding, electrostatic precipitation, atmospheric flows and pollutant dispersion, pollutant formation and photochemical kinetics, pulsating flows, steel continuous casting, metal thermal spraying, mechanical erosion wear, centrifugal pumps and pumping installations, impulse hydro turbines.
He has developed several computer codes: COal Combustion Algorithm (COCA), Modeling of Atmospheric Pollution (MAP), COal Grinding Algorithm (COGA), Simulation of ELectrostatic Filters (SELF), FLow Automated Solver (FLAS), Fast Lagrangian Solver (FLS), Hybrid Power Systems Operation Simulator (HYPSOS), and he has been involved in feasibility studies for various industrial innovations.
His current interests include the flow analysis and hydrodynamic design optimization in hydraulic turbomachinery using Eulerian and Lagrangian methods, as well as the optimal sizing and design of hydroelectric, pumped-storage, and hybrid power plants.
Proceedings of the 7th IASME/WSEAS International Conference on FLUID MECHANICS and AERODYNAMICS
ISSN: 1790-5095 15 ISBN: 978-960-474-106-9
Authors Index
Abdi Dezfuli, E. 34 Im, M.-G. 128 Rahimi, A. B. 178, 182 Ahmadi Givi, F. 17 Janusas, V. 163 Rho, J. 84 Akwaboa, S. 74 Jawarneh, A. M. 101 Riahi, D. N. 174 Al-Hadithi, M. B. 55 Khaniki, A. K. 17 Rouland, E. 196
Aslan, E. 220 Kim, K. 84 Safta, C.-A. 233
Bahari, A. M. 150 Kim, Y.-D. 128 Semionov, N. V. 49, 89, 94 Bahrami, A. R. 226 Kohama, Y. 122 Semisynov, A. I. 89
Bahrami, M. 182, 226 Kosinov, A. D. 49, 89, 94 Shamsai, A. 34 Bassirparsa, H. 17 Kurbatskaya, L. I. 188 Sheikhy, N. 178, 182 Benim, A. C. 62, 220 Kurbatskiy, A. F. 188 Shekhi, N. 226 Benra, F.-K. 116, 157 Kwak, M. 84 Smorodsky, B. V. 68
Bertasiene, A. 163 Lee, D. 84 Sohrab, S. H. 41, 134, 157 Bidokhti, A. A. 17 Lee, J. 84 Stoia-Djeska, M. 233
Bognar, G. 41 Lee, Y. 84 Tagaev, S. N. 89
Cagan, M. 62 Li, L. 212 Taymaz, I. 220
Danlos, A. 196 Marrion, M. 141 Terekhova, N. M. 28 Dohmen, H. J. 116 Mensah, P. 74 Wan, B. 157 Ferguson, F. 74 Mosaddad, S. M. 17 Wilk, A. 170 Gaponov, S. A. 68 Obayashi, S. 122 Woods, A. 141
Ghandriz, R. 107 Oh, Y.-K. 128 Yan, Y. 21
Goudarzi, M. 107 Panina, A. V. 94 Yermolaev, Y. G. 49, 89, 94 Gunes, D. 62 Paranthoen, P. 196 Zebardast, A. 34
Ha, J. 122 Park, J.-Y. 128, 128 Zhan, H. 202, 212 He, X. Q. 21 Patte-Rouland, B. 196 Zhang, L. X. 21 Hejazi, K. 150 Rahimi, A. B. 226
Proceedings of the 7th IASME/WSEAS International Conference on FLUID MECHANICS and AERODYNAMICS
ISSN: 1790-5095 240 ISBN: 978-960-474-106-9
