Information Preservation Methods For Modeling Micro Scale Gas Flows
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Information Preservation Methods For Modeling Micro Scale Gas Flows
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Author : Quanhua Sun
language : en
Publisher:
Release Date : 2003
Information Preservation Methods For Modeling Micro Scale Gas Flows written by Quanhua Sun and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.
Efficient Numerical Techniques For Multiscale Modeling Of Thermally Driven Gas Flows With Application To Thermal Sensing Atomic Force Microscopy
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Author : Nathan Daniel Masters
language : en
Publisher:
Release Date : 2006
Efficient Numerical Techniques For Multiscale Modeling Of Thermally Driven Gas Flows With Application To Thermal Sensing Atomic Force Microscopy written by Nathan Daniel Masters and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Fluid dynamics categories.
The modeling of Micro- and NanoElectroMechanical Systems (MEMS and NEMS) requires new computational techniques that can deal efficiently with geometric complexity and scale dependent effects that may arise. Reduced feature sizes increase the coupling of physical phenomena and noncontinuum behavior, often requiring models based on molecular descriptions and/or first principles. Furthermore, noncontinuum effects are often localized to small regions of (relatively) large systemsprecluding the global application of microscale models due to computational expense. Multiscale modeling couples efficient continuum solvers with detailed microscale models to providing accurate and efficient models of complete systems. This thesis presents the development of multiscale modeling techniques for nonequilibrium microscale gas phase phenomena, especially thermally driven microflows. Much of this focuses on improving the ability of the Information Preserving DSMC (IP-DSMC) to model thermally driven flows. The IP-DSMC is a recent technique that seeks to accelerate the solution of direct simulation Monte Carlo (DSMC) simulations by preserving and transporting certain macroscopic quantities within each simulation molecules. The primary contribution of this work is the development of the Octant Splitting IP-DSMC (OSIP-DSMC) which recovers previously unavailable information from the preserved quantities and the microscopic velocities. The OSIP-DSMC can efficiently simulate flow fields induced by nonequilibrium systems, including phenomena such as thermal transpiration. The OSIP-DSMC provides an efficient method to explore rarefied gas transport phenomena which may lead to a greater understanding of these phenomena and new concepts for how these may be utilized in practical engineering systems. Multiscale modeling is demonstrated utilizing the OSIP-DSMC and a 2D BEM solver for the continuum (heat transfer) model coupled with a modified Alternating Schwarz coupling scheme. An interesting application for this modeling technique is Thermal Sensing Atomic Force Microscopy (TSAFM). TSAFM relies on gas phase heat transfer between heated cantilever probes and the scanned surface to determine the scan height, and thus the surface topography. Accurate models of the heat transfer phenomena are required to correctly interpret scan data. This thesis presents results demonstrating the effect of subcontinuum heat transfer on TSAFM operation and explores the mechanical effects of the Knudsen Force on the heated cantilevers.
Direct Modeling For Computational Fluid Dynamics Construction And Application Of Unified Gas Kinetic Schemes
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Author : Kun Xu
language : en
Publisher: World Scientific
Release Date : 2014-12-23
Direct Modeling For Computational Fluid Dynamics Construction And Application Of Unified Gas Kinetic Schemes written by Kun Xu and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-12-23 with Technology & Engineering categories.
Computational fluid dynamics (CFD) studies the flow motion in a discretized space. Its basic scale resolved is the mesh size and time step. The CFD algorithm can be constructed through a direct modeling of flow motion in such a space. This book presents the principle of direct modeling for the CFD algorithm development, and the construction unified gas-kinetic scheme (UGKS). The UGKS accurately captures the gas evolution from rarefied to continuum flows. Numerically it provides a continuous spectrum of governing equation in the whole flow regimes.
Measurement Technology For Micro Scale Aerodynamics
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Author : Michael James Martin
language : en
Publisher:
Release Date : 2006
Measurement Technology For Micro Scale Aerodynamics written by Michael James Martin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.
Parallel Computational Fluid Dynamics 2007
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Author : Ismail H. Tuncer
language : en
Publisher: Springer Science & Business Media
Release Date : 2009-04-21
Parallel Computational Fluid Dynamics 2007 written by Ismail H. Tuncer 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 2009-04-21 with Mathematics categories.
At the 19th Annual Conference on Parallel Computational Fluid Dynamics held in Antalya, Turkey, in May 2007, the most recent developments and implementations of large-scale and grid computing were presented. This book, comprised of the invited and selected papers of this conference, details those advances, which are of particular interest to CFD and CFD-related communities. It also offers the results related to applications of various scientific and engineering problems involving flows and flow-related topics. Intended for CFD researchers and graduate students, this book is a state-of-the-art presentation of the relevant methodology and implementation techniques of large-scale computing.
Rarefied Gas Dynamics
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Author : Ching Shen
language : en
Publisher: Springer Science & Business Media
Release Date : 2006-03-30
Rarefied Gas Dynamics written by Ching Shen 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 2006-03-30 with Science categories.
Aerodynamics is a science engaged in the investigation of the motion of air and other gases and their interaction with bodies, and is one of the most important bases of the aeronautic and astronautic techniques. The continuous improvement of the configurations of the airplanes and the space vehicles aid the constant enhancement of their performances are closely related with the development of the aerodynamics. In the design of new flying vehicles the aerodynamics will play more and more important role. The undertakings of aeronautics and astronautics in our country have gained achievements of world interest, the aerodynamics community has made outstanding contributions for the development of these undertakings and the science of aerodynamics. To promote further the development of the aerodynamics, meet the challenge in the new century, summary the experience, cultivate the professional personnel and to serve better the cause of aeronautics and astronautics and the national economy, the present Series of Modern Aerodynamics is organized and published.
03 3764 03 3916
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Author :
language : en
Publisher:
Release Date : 2003
03 3764 03 3916 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Thermodynamics categories.
The Mems Handbook
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Author : Mohamed Gad-el-Hak
language : en
Publisher: CRC Press
Release Date : 2001-09-27
The Mems Handbook written by Mohamed Gad-el-Hak and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001-09-27 with Technology & Engineering categories.
The revolution is well underway. Our understanding and utilization of microelectromechanical systems (MEMS) are growing at an explosive rate with a worldwide market approaching billions of dollars. In time, microdevices will fill the niches of our lives as pervasively as electronics do right now. But if these miniature devices are to fulfill their mammoth potential, today's engineers need a thorough grounding in the underlying physics, modeling techniques, fabrication methods, and materials of MEMS. The MEMS Handbook delivers all of this and more. Its team of authors-unsurpassed in their experience and standing in the scientific community- explore various aspects of MEMS: their design, fabrication, and applications as well as the physical modeling of their operations. Designed for maximum readability without compromising rigor, it provides a current and essential overview of this fledgling discipline.
Single And Two Phase Flows On Chemical And Biomedical Engineering
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Author : Ricardo Dias
language : en
Publisher: Bentham Science Publishers
Release Date : 2012-07-30
Single And Two Phase Flows On Chemical And Biomedical Engineering written by Ricardo Dias and has been published by Bentham Science Publishers this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-07-30 with Science categories.
Single and two-phase flows are ubiquitous in most natural process and engineering systems. Examples of systems or process include, packed bed reactors, either single phase or multiphase, absorber and adsorber separation columns, filter beds, plate heat exchangers, flow of viscoelastic fluids in polymer systems, or the enhanced recovery of oil, among others. In each case the flow plays a central role in determining the system or process behavior and performance. A better understanding of the underlying physical phenomena and the ability to describe the phenomena properly are both crucial to improving design, operation and control processes involving the flow of fluids, ensuring that they will be more efficient and cost effective. Expanding disciplines such as microfluidics and the simulation of complex flow physical systems, such as blood flow in physiological networks, also rely heavily on accurate predictions of fluid flow. Recent advances either in computational and experimental techniques are improving the existing knowledge of single and multiphase flows in engineering and physical systems of interest. This ebook is a review on the state-of-the-art and recent advances in critical areas of fluid mechanics and transport phenomena with respect to chemical and biomedical engineering applications.
Slip Model Performance For Micro Scale Gas Flows
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Author : Matthew J. McNenly
language : en
Publisher:
Release Date : 2003
Slip Model Performance For Micro Scale Gas Flows written by Matthew J. McNenly and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.