Download or read book Numerical Calculations of Gas surface Interactions written by Richard A. Oman and published by . This book was released on 1966 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Numerical Calculations of Gas surface Interactions written by Richard A. Oman and published by . This book was released on 1966 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dynamics of Gas Surface Interactions written by Ricardo Diez Muino and published by Springer Science & Business Media. This book was released on 2013-02-26 with total page 439 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gives a representative survey of the state of the art of research on gas-surface interactions. It provides an overview of the current understanding of gas surface dynamics and, in particular, of the reactive and non-reactive processes of atoms and small molecules at surfaces. Leading scientists in the field, both from the theoretical and the experimental sides, write in this book about their most recent advances. Surface science grew as an interdisciplinary research area over the last decades, mostly because of new experimental technologies (ultra-high vacuum, for instance), as well as because of a novel paradigm, the ‘surface science’ approach. The book describes the second transformation which is now taking place pushed by the availability of powerful quantum-mechanical theoretical methods implemented numerically. In the book, experiment and theory progress hand in hand with an unprecedented degree of accuracy and control. The book presents how modern surface science targets the atomic-level understanding of physical and chemical processes at surfaces, with particular emphasis on dynamical aspects. This book is a reference in the field.
Download or read book Fundamentals of Gas Surface Interactions written by Howard Saltsburg and published by Elsevier. This book was released on 2013-10-22 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fundamentals of Gas–Surface Interactions presents the study of the surface itself and the study of the gas phase partner of the interaction in which physical or chemical transformation of the gas resulted from that interaction. This book discusses the study of the energy and momentum exchanges resulting from the gas–solid physical interaction in which either gas or solid phase properties can be measured. Organized into three parts encompassing 33 chapters, this book begins with an overview of the different sensitive physical methods for the study of surface topography, surface defects, and surface irregularities to an accuracy of a few Angstroms. This text then reviews the adsorption at very low coverage that has yielded to equilibrium analysis. Other chapters consider the measurement of surface area by adsorption and optical techniques. The final chapter deals with scattering processes including momentum and energy transfer. This book is a valuable resource for engineers.
Download or read book Dynamics of Gas surface Interactions written by Charles T. Rettner and published by . This book was released on 1991 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive overview of what is currently one of the most active areas within chemical physics. It presents the history, status and future direction of the broad field of dynamical studies of gas-surface collisions, with an emphasis on problems of a chemical nature. Dynamics of Gas-Surface Interactions discusses a selection of important topics and provides a balanced picture of the whole field. It is written by experts in the respective subjects and no previous volume has offered such detailed coverage. This book will provide a valuable introduction to the subject for final year undergraduates and graduate students, as well as an important reference work for all those involved in this exciting area.
Download or read book Interaction of Gases with Surfaces written by Alexander V. Bogdanov and published by Springer Science & Business Media. This book was released on 2008-09-11 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: Interface phenomena are most fascinating because of the mixing of different scales and the interference of diverse physical processes. This makes it necessary to use different levels of description: microscopic, kinetic, and gas-dynamical. A unified quasiclassical approach is used to answer practical questions dealing with inelastic gas-surface scattering, the kinetics of adsorption layers, the evolution of inhomogeneities and defects at the surface, the Knudsen layer, the development of boundary conditions on the kinetic and gas-dynamical levels, the determination of exchange and slip coefficients, and so on.
Download or read book Rarefied Gas Dynamics written by Carlo Cercignani and published by Cambridge University Press. This book was released on 2000-02-28 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this book is to present the concepts, methods and applications of kinetic theory to rarefied gas dynamics. After introducing the basic tools, problems in plane geometry are treated using approximation techniques (perturbation and numerical methods). These same techniques are later used to deal with two- and three-dimensional problems. The models include not only monatomic but also polyatomic gases, mixtures, chemical reactions. A special chapter is devoted to evaporation and condensation phenomena. Each section is accompanied by problems which are mainly intended to demonstrate the use of the material in the text and to outline additional subjects, results and equations. This will help ensure that the book can be used for a range of graduate courses in aerospace engineering or applied mathematics.
Download or read book Fundamentals of Gas surface Interactions written by United States and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fundamentals of Gas Surface Interactions written by Howard Saltsburg and published by . This book was released on 1967 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fundamentals of gas surface interactions written by Howard Saltsburg and published by . This book was released on 1967 with total page 557 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dynamics of Gas Surface Interaction written by Giorgio Benedek and published by . This book was released on 2014-01-15 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dynamics of Gas Surface Interaction written by Giorgio Benedek and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 295 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent decades surface science has experienced a large growth in connection with the development of various experimental techniques which are able to characterize solid surfaces through the observation of the scattering of ions, electrons, photons or atoms. These methods of investigation, known under different labels such as LEED, AES, XPS, UPS, etc. have been extensively applied in describing the structure, morphology, and chemical and physical properties of crystal surfaces and interfaces of a large variety of materials of interest in solid-state physics, electronics, metallurgy, biophysics, and heterogeneous catalysis. Among these methods we wish to emphasize molecular beam scattering from solid surfaces. ~lolecular beam scattering has gone through a large development in the last ten years. In this decade a large number of laboratories have used this method to study various clean and adsorbate-covered surfaces. The technique is nonetheless quite old. It dates back to the beginning of the thirties, when Estermann and Stern performed the first atom diffraction experiment proving the wave nature of atoms. In the following years the entire subject of gas-surface interaction was considered a branch of rarefied gas dynamics and developed in connection with aerospace research. Attention was then given to the integral properties of gas-solid interactions (sticking and energy accomodation, mean momentum transfer) rather than to atom-surface scatter ing from well-characterized surfaces.
Download or read book Experimental and Numerical Analysis of Interaction Between Gas and Solid Surface written by Ricardo Brancher and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis is devoted to the experimental and numerical study of the interaction between gas and solid surface. Rarefied gas flows through a rectangular microchannel under both isothermal and non-isothermal conditions were experimentally evaluated. The tangential momentum accommodation coefficient for PEEK (Poly Ether Ether Ketone) material associated to five gases (helium, neon, nitrogen, argon, krypton) was extracted from both pressure and temperature gradient driven flows. Additionally, steady one-dimensional flows of a polyatomic gas in the presence of an adsorbing-desorbing surface kept at constant and uniform temperature are simulated by solving numerically the Boltzmann kinetic equation by the Direct Simulation Monte Carlo (DSMC) method. It is considered the flow of gas between two planar and infinite surfaces,where only one surface is able to adsorb and desorb molecules, while the other one is impermeable. Finally, experimental and numerical investigation were performed to analyze the BTEX (benzene, toluene,ethylbenzene and xylenes) species separation inside a chromatographic column. From calibrating the constants of adsorption and desorption, the retention time of each species can be predicted for different operating conditions using the numerical code developed.
Download or read book Fundamentals of Gas Surface Interactions written by Howard Saltsburg and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Fundamentals of Gas-Surface Interactions ...
Download or read book Fluid solid Surface Interactions written by and published by . This book was released on 1974 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Finite Element Modeling of Gas surface Interactions in Hypersonic Flight written by Yuzhen Huang and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Numerical simulations of the effects of gas-surface interactions on gas composition and heat flux at the surface are of paramount importance to the design of thermal protection system of hypersonic vehicles. The present work extends the capabilities of the edge-based finite element three-dimensional all-Mach-number computational fluid dynamics (CFD) code HALO3D by the introduction of partially catalytic and finite-rate surface chemistry models. The partially catalytic model assumes that a fraction of the impinging atoms, whose value is governed by recombination efficiencies derived from arcjet test data, recombines on the surface. Its development is validated using the test data of the Electre blunt cone from the high-enthalpy shock tunnel of the German Aerospace Center. Results are obtained for a five-species Mach 9.7 flow using an unstructured mesh that underwent several anisotropic optimization cycles through OptiGrid. The heat flux profiles for partially catalytic surfaces are in good agreement with previously published numerical solutions and experimental data. The more accurate finite-rate surface chemistry model calculates recombination rates using surface reaction kinetics. Surface species with distinct thermodynamic properties are introduced to complement existing volume species. Three types of surface reaction mechanisms are considered: adsorption/desorption, Eley-Rideal, and Langmuir-Hinshelwood, with the reaction rate coefficients being dependent on surface properties. The spatial assembly and temporal integration of species production terms are validated by matching the transient response of a reactor with an analytical solution for a single irreversible adsorption reaction. The computation of forward and backward surface reaction rate coefficients is verified by comparing the equilibrium results of a reactor with multiple reversible surface reactions with previously published numerical solutions. Finally, a simulation with a reacting air flow around a cylinder with a catalytic silica surface is performed to demonstrate near-wall gas composition calculations using the finite-rate surface chemistry model. This work enables HALO3D to provide accurate predictions of gas composition and heat flux at the surface for the practical design of hypersonic vehicles and constitutes a cornerstone to further code extensions that are currently underway at the McGill University CFD Laboratory, focusing on the modeling of partially ionized flows and ablation"--
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 1028 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
