Modeling The Transition Region

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Modeling The Transition Region

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Author : National Aeronautics and Space Administration (NASA)
language : en
Publisher: Createspace Independent Publishing Platform
Release Date : 2018-07-10

Modeling The Transition Region written by National Aeronautics and Space Administration (NASA) and has been published by Createspace Independent Publishing Platform this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-07-10 with categories.

The current status of transition-region models is reviewed in this report. To understand modeling problems, various flow features that influence the transition process are discussed first. Then an overview of the different approaches to transition-region modeling is given. This is followed by a detailed discussion of turbulence models and the specific modifications that are needed to predict flows undergoing laminar-turbulent transition. Methods for determining the usefulness of the models are presented, and an outlook for the future of transition-region modeling is suggested. Singer, Bart A. Unspecified Center...

The Solar Transition Region

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Author : John T. Mariska
language : en
Publisher: Cambridge University Press
Release Date : 1992

The Solar Transition Region written by John T. Mariska and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Science categories.

The solar transition region, which spans the temperature range from about 20,000 to 1,000,000 K, separates the chromosphere from the corona. All the energy that heats the corona and powers the solar wind must pass through this part of the solar atmosphere. This book summarizes recent ultraviolet and extreme ultraviolet observations of the transition region, the empirical models derived from them, and the physical models that try to explain both the observations and the empirical models. The observational focus is on quiet solar transition region observations made with Skylab and subsequent rocket and satellite experiments. The book also presents a unified discussion of the analysis of ultraviolet and extreme ultraviolet spectroscopic data, including the determination of the emission measure and density and temperature diagnostics. This will be useful to astrophysicists who are confronting high-resolution ultraviolet and extreme ultraviolet data from astrophysical plasmas for the first time.

Modeling The Transition Region

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Author : Bart A. Singer
language : en
Publisher:
Release Date : 1993

Modeling The Transition Region written by Bart A. Singer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Transition flow categories.

The current status of transition-region models is reviewed in this report. To understand modeling problems, various flow features that influence the transition process are discussed first. Then an overview of the different approaches to transition-region modeling is given. This is followed by a detailled discussion of turbulence models and the specific modifications that are needed to predict flows undergoing laminar-turbulent transition. Methods for determining the usefulness of the models are presented, and an outlook for the future of transition-region modeling is suggested.

Modeling Of The Heat Transfer In Bypass Transitional Boundary Layer Flows

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Author : Frederick F. Simon
language : en
Publisher:
Release Date : 1991

Modeling Of The Heat Transfer In Bypass Transitional Boundary Layer Flows written by Frederick F. Simon and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Boundary layer categories.

Mosfet Models For Vlsi Circuit Simulation

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Author : Narain D. Arora
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06

Mosfet Models For Vlsi Circuit Simulation written by Narain D. Arora and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Computers categories.

Metal Oxide Semiconductor (MOS) transistors are the basic building block ofMOS integrated circuits (I C). Very Large Scale Integrated (VLSI) circuits using MOS technology have emerged as the dominant technology in the semiconductor industry. Over the past decade, the complexity of MOS IC's has increased at an astonishing rate. This is realized mainly through the reduction of MOS transistor dimensions in addition to the improvements in processing. Today VLSI circuits with over 3 million transistors on a chip, with effective or electrical channel lengths of 0. 5 microns, are in volume production. Designing such complex chips is virtually impossible without simulation tools which help to predict circuit behavior before actual circuits are fabricated. However, the utility of simulators as a tool for the design and analysis of circuits depends on the adequacy of the device models used in the simulator. This problem is further aggravated by the technology trend towards smaller and smaller device dimensions which increases the complexity of the models. There is extensive literature available on modeling these short channel devices. However, there is a lot of confusion too. Often it is not clear what model to use and which model parameter values are important and how to determine them. After working over 15 years in the field of semiconductor device modeling, I have felt the need for a book which can fill the gap between the theory and the practice of MOS transistor modeling. This book is an attempt in that direction.

Device And Materials Modeling In Pem Fuel Cells

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Author : Stephen J. Paddison
language : en
Publisher: Springer Science & Business Media
Release Date : 2008-10-15

Device And Materials Modeling In Pem Fuel Cells written by Stephen J. Paddison and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-10-15 with Technology & Engineering categories.

Computational studies on fuel cell-related issues are increasingly common. These studies range from engineering level models of fuel cell systems and stacks to molecular level, electronic structure calculations on the behavior of membranes and catalysts, and everything in between. This volume explores this range. It is appropriate to ask what, if anything, does this work tell us that we cannot deduce intuitively? Does the emperor have any clothes? In answering this question resolutely in the affirmative, I will also take the liberty to comment a bit on what makes the effort worthwhile to both the perpetrator(s) of the computational study (hereafter I will use the blanket terms modeler and model for both engineering and chemical physics contexts) and to the rest of the world. The requirements of utility are different in the two spheres. As with any activity, there is a range of quality of work within the modeling community. So what constitutes a useful model? What are the best practices, serving both the needs of the promulgator and consumer? Some of the key com- nents are covered below. First, let me provide a word on my ‘credentials’ for such commentary. I have participated in, and sometimes initiated, a c- tinuous series of such efforts devoted to studies of PEMFC components and cells over the past 17 years. All that participation was from the experim- tal, qualitative side of the effort.

Boundary Layer Flows

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Author : Vallampati Ramachandra Prasad
language : en
Publisher:
Release Date : 2020

Boundary Layer Flows written by Vallampati Ramachandra Prasad and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020 with Boundary layer categories.

Simulation Modeling

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Author : Constantin Volosencu
language : en
Publisher: BoD – Books on Demand
Release Date : 2022-01-19

Simulation Modeling written by Constantin Volosencu and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-01-19 with Computers categories.

The book presents some recent specialized works of a theoretical and practical nature in the field of simulation modeling, which is being addressed to a large number of specialists, mathematicians, doctors, engineers, economists, professors, and students. The book comprises 11 chapters that promote modern mathematical algorithms and simulation modeling techniques, in practical applications, in the following thematic areas: mathematics, biomedicine, systems of systems, materials science and engineering, energy systems, and economics. This project presents scientific papers and applications that emphasize the capabilities of simulation modeling methods, helping readers to understand the phenomena that take place in the real world, the conditions of their development, and their effects, at a high scientific and technical level. The authors have published work examples and case studies that resulted from their researches in the field. The readers get new solutions and answers to questions related to the emerging applications of simulation modeling and their advantages.

Predictive Material Modeling

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Author : Mark Kirk
language : en
Publisher: ASTM International
Release Date : 2004

Predictive Material Modeling written by Mark Kirk and has been published by ASTM International this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Technology & Engineering categories.

Nine papers from a November 2001 American Society for Testing and Materials symposium devoted to prediction of fundamental material behavior and structural response under a range of load conditions are presented by Kirk (U.S. Nuclear and Regulatory Commission) and Natishan (Phoenix Engineering Assoc

Transition Region Modeling For Compressible Flow

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Author : C. L. Chang
language : en
Publisher:
Release Date : 1992

Transition Region Modeling For Compressible Flow written by C. L. Chang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with categories.