Author: Wen-Lan Wang
Publisher:
ISBN:
Category :
Languages : en
Pages : 406

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Author: D. C. Wadsworth
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author: Thomas Edward Schwartzentruber
Publisher:
ISBN:
Category :
Languages : en
Pages : 480

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Author: Iain D. Boyd
Publisher: Cambridge University Press
ISBN: 1316871371
Category : Technology & Engineering
Languages : en
Pages : 383

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Book Description
This current and comprehensive book provides an updated treatment of molecular gas dynamics topics for aerospace engineers, or anyone researching high-temperature gas flows for hypersonic vehicles and propulsion systems. It demonstrates how the areas of quantum mechanics, kinetic theory, and statistical mechanics can combine in order to facilitate the study of nonequilibrium processes of internal energy relaxation and chemistry. All of these theoretical ideas are used to explain the direct simulation Monte Carlo (DSMC) method, a numerical technique based on molecular simulation. Because this text provides comprehensive coverage of the physical models available for use in the DSMC method, in addition to the equations and algorithms required to implement the DSMC numerical method, readers will learn to solve nonequilibrium flow problems and perform computer simulations, and obtain a more complete understanding of various physical modeling options for DSMC than is available in other texts.

Author: Yong Shi
Publisher: Springer Science & Business Media
ISBN: 3540725830
Category : Computers
Languages : en
Pages : 1310

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Book Description
Annotation The four-volume set LNCS 4487-4490 constitutes the refereed proceedings of the 7th International Conference on Computational Science, ICCS 2007, held in Beijing, China in May 2007. More than 2400 submissions were made to the main conference and its 35 topical workshops. The 80 revised full papers and 11 revised short papers of the main track were carefully reviewed and selected from 360 submissions and are presented together with 624 accepted workshop papers in four volumes. According to the ICCS 2007 theme "Advancing Science and Society through Computation" the papers cover a large volume of topics in computational science and related areas, from multiscale physics, to wireless networks, and from graph theory to tools for program development. The papers are arranged in topical sections on efficient data management, parallel monte carlo algorithms, simulation of multiphysics multiscale systems, dynamic data driven application systems, computer graphics and geometric modeling, computer algebra systems, computational chemistry, computational approaches and techniques in bioinformatics, computational finance and business intelligence, geocomputation, high-level parallel programming, networks theory and applications, collective intelligence for semantic and knowledge grid, collaborative and cooperative environments, tools for program development and analysis in CS, intelligent agents in computing systems, CS in software engineering, computational linguistics in HCI, internet computing in science and engineering, workflow systems in e-science, graph theoretic algorithms and applications in cs, teaching CS, high performance data mining, mining text, semi-structured, Web, or multimedia data, computational methods in energy economics, risk analysis, advances in computational geomechanics and geophysics, meta-synthesis and complex systems, scientific computing in electronics engineering, wireless and mobile systems, high performance networked media and services, evolution toward next generation internet, real time systems and adaptive applications, evolutionary algorithms and evolvable systems.

Author: Tahir Geok?cen
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author: Zhi-Hui Wang
Publisher: Springer
ISBN: 3662443651
Category : Technology & Engineering
Languages : en
Pages : 107

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Theoretical Modelling of Aeroheating on Sharpened Noses under Rarefied Gas Effects and Nonequilibrium Real Gas Effects employs a theoretical modeling method to study hypersonic flows and aeroheating on sharpened noses under rarefied gas effects and nonequilibrium real gas effects that are beyond the scope of traditional fluid mechanics. It reveals the nonlinear and nonequilibrium features, discusses the corresponding flow and heat transfer mechanisms, and ultimately establishes an analytical engineering theory framework for hypersonic rarefied and chemical nonequilibrium flows. The original analytical findings presented are not only of great academic significance, but also hold considerable potential for applications in engineering practice. The study explores a viable new approach, beyond the heavily relied-upon numerical methods and empirical formulas, to the present research field, which could be regarded as a successful implementation of the idea and methodology of the engineering sciences.

Author: Xinguo Zhang
Publisher: Springer
ISBN: 981133305X
Category : Technology & Engineering
Languages : en
Pages : 3068

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Book Description
This book is a compilation of peer-reviewed papers from the 2018 Asia-Pacific International Symposium on Aerospace Technology (APISAT 2018). The symposium is a common endeavour between the four national aerospace societies in China, Australia, Korea and Japan, namely, the Chinese Society of Aeronautics and Astronautics (CSAA), Royal Aeronautical Society Australian Division (RAeS Australian Division), the Korean Society for Aeronautical and Space Sciences (KSAS) and the Japan Society for Aeronautical and Space Sciences (JSASS). APISAT is an annual event initiated in 2009 to provide an opportunity for researchers and engineers from Asia-Pacific countries to discuss current and future advanced topics in aeronautical and space engineering.

Author: Barry Koren
Publisher: Springer Science & Business Media
ISBN: 3642033873
Category : Mathematics
Languages : en
Pages : 501

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Book Description
The aim of the present book is to show, in a broad and yet deep way, the state of the art in computational science and engineering. Examples of topics addressed are: fast and accurate numerical algorithms, model-order reduction, grid computing, immersed-boundary methods, and specific computational methods for simulating a wide variety of challenging problems, problems such as: fluid-structure interaction, turbulent flames, bone-fracture healing, micro-electro-mechanical systems, failure of composite materials, storm surges, particulate flows, and so on. The main benefit offered to readers of the book is a well-balanced, up-to-date overview over the field of computational science and engineering, through in-depth articles by specialists from the separate disciplines.

Author: Shrutakeerti Mallikarjun Vagishwari
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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Book Description
"HALO3D (High-Altitude Low-Orbit, 3D) is a multidisciplinary all-Mach CFD system developed by the McGill CFD Lab to simulate flow fields around hypersonic aircraft whose flight path spans low (continuum) to high (rarefied) altitudes. HALO3D uses an unstructured edge-based finite-element Navier-Stokes (NS) flow solver (HALO3D-NS) for the continuum regime that includes complex thermochemistry. This thesis extends the applicability of HALO3D to the rarefied regime through three significant efforts. First, a rarefied flow solver, HALO3D-DSMC (Direct Simulation Monte Carlo), is developed to tackle the high-altitude flow field. It is a 3D unstructured DSMC code capable of simulating thermochemical non-equilibrium and volume chemistry with sub-cell features for collision pair selection. Validation simulations for HALO3D-DSMC are presented. Second, a HALO3D-HYBRID infrastructure is developed to simulate moderate Knudsen number flows. In a domain consisting of continuum and rarefied patches, the hybrid routine transparently steps between NS and DSMC techniques to calculate a global solution with no user intervention. Delineating the DSMC and NS regions is accomplished by using the gradient length local Knudsen number (Kn_GLL) as a continuum breakdown detector. Cell and node masks based on the Kn_GLL distribution are inputs for mesh population, particle insertion, buffer zone creation, and NS-DSMC boundary condition routines. Bird's leading-edge and 2D cylinder cases are used to demonstrate that a finite-element NS-DSMC hybrid algorithm can be successfully built to address high-Mach flows. Consistent treatment of thermochemical non-equilibrium by both continuum and rarefied modules is found to be necessary to accurately simulate complex flows. Third, is the coupling of HALO3D-DSMC and HALO3D-HYBRID with a powerful in-house solution-driven automatic mesh optimizer, OptiGrid, heavily used in the NS context. A thorough investigation is carried out on scalars and constraints needed to optimize DSMC and hybrid meshes, an aspect that is currently lacking in the literature. Three optimization constraints: the minimum and maximum edge lengths, and a target number of node/cells are studied and applied to the leading-edge case and flows over 2D and 3D cylinder geometries for freestream Knudsen numbers ranging from 0.01 to 0.047. It is shown that an adaptation scalar combination of flow variables such as density, velocities, temperatures, pressure, and Mach number automatically converges to a final optimized mesh through a series of mesh iterations. The adapted meshes gradually improve the solution's quality without necessarily increasing the number of mesh points or cells, even reducing them sometimes. The solutions represented by the final adapted mesh are smooth and free of irregularities. The solutions and meshes of adapted full DSMC simulations and adapted hybrid simulations are seen to match, thus validating the hybrid solver and showcasing the solver-independence aspect of OptiGrid. Further, the optimized hybrid mesh generates buffers with smooth boundaries and consists of coarse NS cells and refined DSMC cells. The cell sizes from NS to DSMC are seen to reduce organically in the shock and boundary layer. This coupled DSMC/hybrid-OptiGrid system can thus simulate complex 3D geometries and multiscale flow features while drastically reducing mesh preparation time as these are automatically adapted to the emerging physics during the iterative solutions. Taken altogether, the DSMC, hybrid NS-DSMC, and mesh optimization efforts form an advanced system to simulate hypersonic flows over complex geometries with controlled precision and at a much lower expense both in the pre-processing and solution phases. These contributions are the essential components of a seamless hybrid solution approach within HALO3D, upon which other functionalities could be easily built in the future"--