Micro and Macro Mixing

Analysis. and. Modeling. of. Micromixing. in. Microreactors. Marko Hoffmann,
Michael Schlüter, and Norbert Räbiger Institute of Environmental Process
Engineering, University of Bremen Leobener Str. UFT, 28359 Bremen, Germany
Abstract.

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Author: Henning Bockhorn

Publisher: Springer Science & Business Media

ISBN: 9783642045493

Category: Science

Page: 348

View: 816

The homogenization of single phase gases or liquids with chemical reactive components by mixing belongs to one of the oldest basic operations applied in chemical engineering. The mixing process is used as an essential step in nearly all processes of the chemical industry as well as the pharmaceutical and food ind- tries. Recent experimentally and theoretically based results from research work lead to a fairly good prediction of the velocity fields in differend kinds of mixers, where as predictions of simultaneously proceeding homogeneous chemical re- tions, are still not reliable in a similar way. Therefore the design of equipment for mixing processes is still derived from measurements of the so called “mixing time” which is related to the applied methods of measurement and the special - sign of the test equipment itself. The cooperation of 17 research groups was stimulated by improved modern methods for experimental research and visualization, for simulations and nume- cal calculations of mixing and chemical reactions in micro and macro scale of time and local coordinates. The research work was financed for a six years period within the recently finished Priority Program of the German Research Foundation (DFG) named “Analysis, modeling and numerical prediction of flow-mixig with and without chemical reactions (SPP 1141)”. The objective of the investigations was to improve the prediction of efficiencies and selectivities of chemical re- tions on macroscopic scale.

Handbook of Research on Design Control and Modeling of Swarm Robotics

Considering the characteristics of swarm robotics, modeling methods are divided
into four types according to reference (Bayindir, & Sahin, 2007): sensor-based,
microscopic, macroscopic and swarm intelligence based. The four methods are ...

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Author: Tan, Ying

Publisher: IGI Global

ISBN: 9781466695733

Category: Technology & Engineering

Page: 854

View: 985

Studies on robotics applications have grown substantially in recent years, with swarm robotics being a relatively new area of research. Inspired by studies in swarm intelligence and robotics, swarm robotics facilitates interactions between robots as well as their interactions with the environment. The Handbook of Research on Design, Control, and Modeling of Swarm Robotics is a collection of the most important research achievements in swarm robotics thus far, covering the growing areas of design, control, and modeling of swarm robotics. This handbook serves as an essential resource for researchers, engineers, graduates, and senior undergraduates with interests in swarm robotics and its applications.

Simulation Technologies in Networking and Communications

More complicated solutions based on bidirectional coupled simulators and
artificial traces of car movements have been developed. Other authors classify
mobility models into microscopic, macroscopic, and mesoscopic, which are
described in ...

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Author: Al-Sakib Khan Pathan

Publisher: CRC Press

ISBN: 9781482225495

Category: Computers

Page: 648

View: 805

Simulation is a widely used mechanism for validating the theoretical models of networking and communication systems. Although the claims made based on simulations are considered to be reliable, how reliable they really are is best determined with real-world implementation trials. Simulation Technologies in Networking and Communications: Selecting the Best Tool for the Test addresses the spectrum of issues regarding the different mechanisms related to simulation technologies in networking and communications fields. Focusing on the practice of simulation testing instead of the theory, it presents the work of more than 50 experts from around the world. Considers superefficient Monte Carlo simulations Describes how to simulate and evaluate multicast routing algorithms Covers simulation tools for cloud computing and broadband passive optical networks Reports on recent developments in simulation tools for WSNs Examines modeling and simulation of vehicular networks The book compiles expert perspectives about the simulation of various networking and communications technologies. These experts review and evaluate popular simulation modeling tools and recommend the best tools for your specific tests. They also explain how to determine when theoretical modeling would be preferred over simulation. This book does not provide a verdict on the best suitable tool for simulation. Instead, it supplies authoritative analyses of the different kinds of networks and systems. Presenting best practices and insights from global experts, the book provides you with an understanding of what to simulate, where to simulate, whether to simulate or not, when to simulate, and how to simulate for a wide range of issues.

Computational Plasticity

A number of recent works has been concerned with various approaches and
techniques for the micro- macro simulation of heterogeneous materials. Among
these we highlight the contributions by Moulinec and Suquet [10], Smit et al.

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Author: Eugenio Oñate

Publisher: Springer Science & Business Media

ISBN: 1402065779

Category: Technology & Engineering

Page: 265

View: 229

This book contains 14 invited contributions written by distinguished authors who participated in the VIII International Conference on Computational Plasticity held at CIMNE/UPC (www.cimne.com) from 5-8 September 2005, in Barcelona, Spain. The chapters present recent progress and future research directions in the field of computational plasticity.

Computational Earthquake Physics Simulations Analysis and Infrastructure

In this paper, macroscopic friction values from 2-D and 3-D LSM simulations,
performed on an SGI Altix 3700 ... in fault gouge Zones, it is important to
characterize the relationships between the microscopic and macroscopic
mechanics.

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Author: Xiang-chu Yin

Publisher: Springer Science & Business Media

ISBN: 3764379928

Category: Science

Page: 310

View: 450

The first of a two-part work, this volume focuses on microscopic simulation, scaling physics, dynamic rapture and wave propagation, earthquake generation, cycle and seismic pattern. Topics covered range from numerical and theoretical studies of crack propagation, developments in finite difference methods for modeling faults, long time scale simulation of interacting fault systems, and modeling of crustal deformation through to mantle convection.

Proton Exchange Membrane Fuel Cells 8

Multi-scale simulation can contribute to bridging microscopic and macroscopic
understandings effectively. In this manuscript, we described a multi-scale
simulation approach based on an original porous structure simulator and
computational ...

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Author:

Publisher: The Electrochemical Society

ISBN: 9781566776486

Category:

Page: 1078

View: 156

Multiscale Methods

Instead, a microscopic model (possibly of a different type) is available, which
describes the system in full detail; however, the associated computational cost
can be prohibitive for macro-scale simulations. For time-dependent problems of
this ...

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Author: Jacob Fish

Publisher: OUP Oxford

ISBN: 9780191579738

Category: Mathematics

Page: 624

View: 259

Small scale features and processes occurring at nanometer and femtosecond scales have a profound impact on what happens at a larger scale and over an extensive period of time. The primary objective of this volume is to reflect the state-of-the-art in multiscale mathematics, modeling, and simulations and to address the following barriers: What is the information that needs to be transferred from one model or scale to another and what physical principles must be satisfied during the transfer of information? What are the optimal ways to achieve such transfer of information? How can variability of physical parameters at multiple scales be quantified and how can it be accounted for to ensure design robustness? The multiscale approaches in space and time presented in this volume are grouped into two main categories: information-passing and concurrent. In the concurrent approaches various scales are simultaneously resolved, whereas in the information-passing methods the fine scale is modeled and its gross response is infused into the continuum scale. The issue of reliability of multiscale modeling and simulation tools which focus on a hierarchy of multiscale models and an a posteriori model of error estimation including uncertainty quantification, is discussed in several chapters. Component software that can be effectively combined to address a wide range of multiscale simulations is also described. Applications range from advanced materials to nanoelectromechanical systems (NEMS), biological systems, and nanoporous catalysts where physical phenomena operates across 12 orders of magnitude in time scales and 10 orders of magnitude in spatial scales. This volume is a valuable reference book for scientists, engineers and graduate students practicing in traditional engineering and science disciplines as well as in emerging fields of nanotechnology, biotechnology, microelectronics and energy.

Data Driven Modeling Scientific Computation

Essentially, we must decide how to represent the microscopic variables at a
macroscopic level. This would often involve statistical methods for bringing up (
restricting) the dynamics from micro to macroscales. Alternatively, one could also
think ...

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Author: J. Nathan Kutz

Publisher: OUP Oxford

ISBN: 9780191635885

Category: Mathematics

Page: 608

View: 665

The burgeoning field of data analysis is expanding at an incredible pace due to the proliferation of data collection in almost every area of science. The enormous data sets now routinely encountered in the sciences provide an incentive to develop mathematical techniques and computational algorithms that help synthesize, interpret and give meaning to the data in the context of its scientific setting. A specific aim of this book is to integrate standard scientific computing methods with data analysis. By doing so, it brings together, in a self-consistent fashion, the key ideas from: · statistics, · time-frequency analysis, and · low-dimensional reductions The blend of these ideas provides meaningful insight into the data sets one is faced with in every scientific subject today, including those generated from complex dynamical systems. This is a particularly exciting field and much of the final part of the book is driven by intuitive examples from it, showing how the three areas can be used in combination to give critical insight into the fundamental workings of various problems. Data-Driven Modeling and Scientific Computation is a survey of practical numerical solution techniques for ordinary and partial differential equations as well as algorithms for data manipulation and analysis. Emphasis is on the implementation of numerical schemes to practical problems in the engineering, biological and physical sciences. An accessible introductory-to-advanced text, this book fully integrates MATLAB and its versatile and high-level programming functionality, while bringing together computational and data skills for both undergraduate and graduate students in scientific computing.

Meeting the Challenge of Social Problems via Agent Based Simulation

We propose three concepts for multi-agent simulation: These are the
characterization of macroscopic systems, the ... We believe that three concepts
are important to bridge the gap between microscopic and macroscopic
characteristics.

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Author: T. Terano

Publisher: Springer Science & Business Media

ISBN: 4431008306

Category: Business & Economics

Page: 200

View: 395

Social sciences are moving to the next stage. One ofthe promising methodologies is agent-based computer simulation. In a series ofworkshops on Agent-Based Ap­ proaches in Economic and Social Complex Systems (AESCS), ground-breaking studies of complex economic and social phenomena using computational approaches are being presented and discussed. This volume contains papers selected from pre­ sentations at the AESCS '02 held at the University ofTokyo, Japan, on August 16, 2002. The workshop was the second in a series ofPacific Rim activities in interdis­ ciplinary areas of social and computational sciences, the first workshop having been held in Shimane, Japan, May 21-22, 2001. The objective of AESCS workshops is to promote worldwide multidisciplinary activities in multiagent computational economics, organizational science, social dynamics, and complex systems. AESCS brings together researchers and practitio­ ners from diverse fields, such as computer science, economics, physics, sociology, psychology, and complex theory, in order to understand emergent and collective phenomena in economic, organizational, and social systems.AESCS also provides an opportunity for discussion ofthe effectiveness and limitations ofcomputational models and methodologies for the social sciences. The second AESCS workshop focused on the importance ofcumulative progress in agent-based simulation in the social sciences through discussions ofcommon tasks, standard computational models, replication and validation issues, and evalu­ ation and verification criteria for the results.

FORMS FORMAT 2010

Calibration and Validation of Simulation Models for Investigation of Traffic
Assistance Systems Stefan Detering and Lars ... TAS, investigative simulations
simultaneously considering both microscopic and macroscopic behavior are
necessary.

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Author: Eckehard Schnieder

Publisher: Springer Science & Business Media

ISBN: 3642142613

Category: Technology & Engineering

Page: 257

View: 245

Complexity in automation- and safety systems in railway as well as automotive applications are dominated more and more by formal description means, methods and tools. Formal techniques provide next to correctness and integrity checkups – especially for safety relevant systems – the possibility to model, prove, simulate and check the specification of the system as well as to generate the system implementations. Requirements of the CENELEC- and IEC-Standards on formal techniques, particularly with regard to the handling of safety analysis, are to be treated in FORMS/FORMAT 2010. The main focus lies on topics facing formal techniques for railway applications and intelligent transportation systems as well as for automotive applications. Gained findings, experiences and also difficulties associated with the handling of the subject matter as well as description means and tools are to be shown.

Proceedings of the American Society for Composites 2014 Twenty ninth Technical Conference on Composite Materials

In the simulation, microscopic model which was consisted of solid elements and
macroscopic model which was consisted of shell elements were both employed.
Simulation results agreed very well with CLT results, and simulated results ...

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Author: Hyonny Kim

Publisher: DEStech Publications, Inc

ISBN: 9781605951249

Category:

Page: 3200

View: 709

New and not previously published U.S. and international research on composite and nanocomposite materialsFocus on health monitoring/diagnosis, multifunctionality, self-healing, crashworthiness, integrated computational materials engineering (ICME), and moreApplications to aircraft, armor, bridges, ships, and civil structures This fully searchable CD-ROM contains 270 original research papers on all phases of composite materials, presented by specialists from universities, NASA and private corporations such as Boeing. The document is divided into the following sections: Aviation Safety and Aircraft Structures; Armor and Protection; Multifunctional Composites; Effects of Defects; Out of Autoclave Processing; Sustainable Processing; Design and Manufacturing; Stability and Postbuckling; Crashworthiness; Impact and Dynamic Response; Natural, Biobased and Green; Integrated Computational Materials Engineering (ICME); Structural Optimization; Uncertainty Quantification; NDE and SHM Monitoring; Progressive Damage Modeling; Molecular Modeling; Marine Composites; Simulation Tools; Interlaminar Properties; Civil Structures; Textiles. The CD-ROM displays figures and illustrations in articles in full color along with a title screen and main menu screen. Each user can link to all papers from the Table of Contents and Author Index and also link to papers and front matter by using the global bookmarks which allow navigation of the entire CD-ROM from every article. Search features on the CD-ROM can be by full text including all key words, article title, author name, and session title. The CD-ROM has Autorun feature for Windows 2000 or higher products and can also be used with Macintosh computers. The CD includes the program for Adobe Acrobat Reader with Search 11.0. One year of technical support is included with your purchase of this product.

Electrical Engineering in Japan

SUMMARY This paper presents a combined approach of rail traffic simulation
using suitable models , both microscopic and macroscopic . In rail traffic , train
motions do not depend directly on preceding train motions , as in road traffic , but
only ...

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Author:

Publisher:

ISBN: STANFORD:36105020660598

Category: Electrical engineering

Page:

View: 960

Microscopic Simulation of Financial Markets

Most of the models that resulted, rather than aiming to create a comprehensive
market simulation framework, have addressed well-defined questions on the
microscopic origins of certain macroscopic phenomena and have used MS to
support ...

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Author: Haim Levy

Publisher: Elsevier

ISBN: 0080511597

Category: Business & Economics

Page: 300

View: 893

Microscopic Simulation (MS) uses a computer to represent and keep track of individual ("microscopic") elements in order to investigate complex systems which are analytically intractable. A methodology that was developed to solve physics problems, MS has been used to study the relation between microscopic behavior and macroscopic phenomena in systems ranging from those of atomic particles, to cars, animals, and even humans. In finance, MS can help explain, among other things, the effects of various elements of investor behavior on market dynamics and asset pricing. It is these issues in particular, and the value of an MS approach to finance in general, that are the subjects of this book. The authors not only put their work in perspective by surveying traditional economic analyses of investor behavior, but they also briefly examine the use of MS in fields other than finance. Most models in economics and finance assume that investors are rational. However, experimental studies reveal systematic deviations from rational behavior. How can we determine the effect of investors' deviations from rational behavior on asset prices and market dynamics? By using Microscopic Simulation, a methodology originally developed by physicists for the investigation of complex systems, the authors are able to relax classical assumptions about investor behavior and to model it as empirically and experimentally observed. This rounded and judicious introduction to the application of MS in finance and economics reveals that many of the empirically-observed "puzzles" in finance can be explained by investors' quasi-rationality. Researchers use the book because it models heterogeneous investors, a group that has proven difficult to model. Being able to predict how people will invest and setting asset prices accordingly is inherently appealing, and the combination of computing power and statistical mechanics in this book makes such modeling possible. Because many finance researchers have backgrounds in physics, the material here is accessible. Emphasizes investor behavior in determining asset prices and market dynamics Introduces Microscopic Simulation within a simplified framework Offers ways to model deviations from rational decision-making

Discrete Event Modeling and Simulation Technologies

... modular, and distributed modeling & simulation layer, (ii) model abstraction
layer, (iii) microscopic and macroscopic traffic modeling layer, and (iv) ITS
simulation system layer. It supports an intelligent, interacted, and integrated
transportation ...

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Author: Hessam S. Sarjoughian

Publisher: Springer Science & Business Media

ISBN: 0387950656

Category: Computers

Page: 397

View: 518

A Tribute to the 60th Birthday of Bernard P. Zeigler

Developments in Mathematical and Experimental Physics

A two-side benefit of this use is expected: On the one hand, simulations provide
data on molecular systems which can be used to test various theoretical
constructions about the transition from micro to macro description. On the other
hand, ...

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Author: Alfredo Macias

Publisher: Springer Science & Business Media

ISBN: 0306474018

Category: Science

Page: 222

View: 109

The FIRST MEXICAN MEETING ON MATHEMATICAL AND EXPERI MENTAL PHYSICS was held at EL COLEGIO N ACIONAL in Mexico Cit y, Mexico, from September 10 to 14, 2001. This event consisted of the LEOPOLDO GARciA-COLiN SCHERER Medal Lecture, delivered by Prof. Nicholas G. van Kampen, a series of plenary talks by Leopoldo Garcia-Colin, Giinter Nimtz, Luis F. Rodriguez, Ruoon Barrera, and Donald Saari, and of three parallel symposia, namely, Cosmology and Gravitation, Statistical Physics and Beyond, and Hydrodynamics and Dynamical Systems. The response from the Physics community was enthusiastic, with over 200 participants and around 80 speakers, from allover the world: USA, Canada, Mexico, Germany, France, Holland, United Kingdom, Switzerland, Spain, and Hungary. The main aim of the conference is to provide a scenario to Mexican researchers on the topics of Mathematical and Experimental Physics in order to keep them in contact with work going on in other parts of the world and at the same time to motivate and support the young and mid career researchers from our country. To achieve this goal, we decided to the most distinguished experts in the subjects of the invite as lecturers conference and to give the opportunity to young scientist to communi cate the results of their work. The plan is to celebrate this international endeavor every three years.

Multiscale Problems in the Life Sciences

From Microscopic to Macroscopic Jacek Banasiak, Jacek Miekisz Vincenzo
Capasso, Miroslaw Lachowicz. Modelling Aspects of Cancer Growth: Insight from
Mathematical and Numerical Analysis and Computational Simulation Mark A.J. ...

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Author: Jacek Banasiak

Publisher: Springer Science & Business Media

ISBN: 9783540783602

Category: Mathematics

Page: 330

View: 741

The aim of this volume that presents lectures given at a joint CIME and Banach Center Summer School, is to offer a broad presentation of a class of updated methods providing a mathematical framework for the development of a hierarchy of models of complex systems in the natural sciences, with a special attention to biology and medicine. Mastering complexity implies sharing different tools requiring much higher level of communication between different mathematical and scientific schools, for solving classes of problems of the same nature. Today more than ever, one of the most important challenges derives from the need to bridge parts of a system evolving at different time and space scales, especially with respect to computational affordability. As a result the content has a rather general character; the main role is played by stochastic processes, positive semigroups, asymptotic analysis, kinetic theory, continuum theory, and game theory.

Numerical Simulation in Molecular Dynamics

Related phenomena also arise on microscopic scales. ... The analytic study of the
behavior of a fluid on the macroscopic level is based on the Navier-Stokes
equations which are the standard equations for the conservation of mass,
momentum ...

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Author: Michael Griebel

Publisher: Springer Science & Business Media

ISBN: 9783540680956

Category: Science

Page: 476

View: 124

This book details the necessary numerical methods, the theoretical background and foundations and the techniques involved in creating computer particle models, including linked-cell method, SPME-method, tree codes, amd multipol technique. It illustrates modeling, discretization, algorithms and their parallel implementation with MPI on computer systems with distributed memory. The text offers step-by-step explanations of numerical simulation, providing illustrative code examples. With the description of the algorithms and the presentation of the results of various simulations from fields such as material science, nanotechnology, biochemistry and astrophysics, the reader of this book will learn how to write programs capable of running successful experiments for molecular dynamics.

Transport Simulation

HUMAN OVERREACTION : MODELING OF SYNCHRONIZED TWO - LANE
TRAFFIC Andreas Pottmeier , Christian Thiemann ... This resulted in a convincing
reproduction of the microscopic and macroscopic features of synchronized traffic .

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Author: Edward Chung

Publisher: EPFL Press

ISBN: 1420095099

Category: Technology & Engineering

Page: 213

View: 982

Created by an invited panel of experts, this book addresses students, engineers, and scholars as well as anyone who needs a state-of-the-art overview of transport simulation. The many exciting developments in this field are covered in depth. Pub 4/09.

Micro Macro Interactions

In this work, an elasto- viscoplastic material model is applied in axisymmetric
finite element simulations, whereas the macroscopic material behaviour is
established based on constitutive equations of the single crystal. In the
simulations, real ...

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Author: Albrecht Bertram

Publisher: Springer Science & Business Media

ISBN: 9783540857150

Category: Technology & Engineering

Page: 312

View: 967

Many materials or media in nature and technology possess a microstructure which determines their macroscopic behaviour. The knowledge of the relevant mechanisms is often more comprehensive on the micro than on the macro scale. On the other hand, not all information on the micro level is relevant for the understanding of this macro behaviour. Therefore, averaging and homogenization methods are needed to select only the specific information from the micro scale, which influences the macro scale. These methods also open the possibility to design or to influence microstructures with the objective to optimize their macro behaviour. This book presents the development of new methods in this interdisciplinary field of macro- micro-interactions of different engineering branches like mechanical and process engineering, applied mathematics, theoretical, and computational physics. In particular, solids with microstructures and particle systems are considered.