A Technique for Solving the General Reaction-rate Equations in the Atmosphere PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download A Technique for Solving the General Reaction-rate Equations in the Atmosphere PDF full book. Access full book title A Technique for Solving the General Reaction-rate Equations in the Atmosphere by T. J. Keneshea. Download full books in PDF and EPUB format.
Author: T. J. Keneshea
Publisher:
ISBN:
Category : Atmosphere
Languages : en
Pages : 158
Get Book Here
Book Description
With the availability of numerical techniques for solving an extensive set of nonlinear differential equations and high-speed computers for performing the calculations, interest in solving the unrestricted reaction-rate equations is growing among ionospheric researchers. In view of this a refinement is given of the techniques previously developed in PB-163 071 and AD-424 173. The computer code is written to solve the photochemical behavior of 15 atmospheric species; these species are electrons, O( - ), O2( - ), O3( - ), NO2( - ), O(+), O2(+), N2(+), NO(+), NO, N, NO2, O3, N2O, and O. Built into the code are 168 reactions that can conceivably take place among these constituents. Several examples of the results obtained using the code are presented, including the buildup of ionization from zero concentrations at altitudes in the D and E regions and the deionization of an atmosphere with high initial electron densities. The diurnal variation of the atmospheric constituents is also presented along with profiles for the above-mentioned species from 60 km to 120 km. The computer codes are included in their entirety with complete explanations on their usage. (Author).
Author: T. J. Keneshea
Publisher:
ISBN:
Category : Atmosphere
Languages : en
Pages : 158
Get Book Here
Book Description
With the availability of numerical techniques for solving an extensive set of nonlinear differential equations and high-speed computers for performing the calculations, interest in solving the unrestricted reaction-rate equations is growing among ionospheric researchers. In view of this a refinement is given of the techniques previously developed in PB-163 071 and AD-424 173. The computer code is written to solve the photochemical behavior of 15 atmospheric species; these species are electrons, O( - ), O2( - ), O3( - ), NO2( - ), O(+), O2(+), N2(+), NO(+), NO, N, NO2, O3, N2O, and O. Built into the code are 168 reactions that can conceivably take place among these constituents. Several examples of the results obtained using the code are presented, including the buildup of ionization from zero concentrations at altitudes in the D and E regions and the deionization of an atmosphere with high initial electron densities. The diurnal variation of the atmospheric constituents is also presented along with profiles for the above-mentioned species from 60 km to 120 km. The computer codes are included in their entirety with complete explanations on their usage. (Author).
Author: Paul Flowers
Publisher:
ISBN: 9781947172623
Category : Chemistry
Languages : en
Pages : 0
Get Book Here
Book Description
Chemistry 2e is designed to meet the scope and sequence requirements of the two-semester general chemistry course. The textbook provides an important opportunity for students to learn the core concepts of chemistry and understand how those concepts apply to their lives and the world around them. The book also includes a number of innovative features, including interactive exercises and real-world applications, designed to enhance student learning. The second edition has been revised to incorporate clearer, more current, and more dynamic explanations, while maintaining the same organization as the first edition. Substantial improvements have been made in the figures, illustrations, and example exercises that support the text narrative. Changes made in Chemistry 2e are described in the preface to help instructors transition to the second edition.
Author: Frankline E. Niles
Publisher:
ISBN:
Category : Atmosphere
Languages : en
Pages : 130
Get Book Here
Book Description
One of the Keneshea computer codes (see AD-424 173) was adapted for use on the Ballistic Research Laboratories Electronic Scientific Computer. Using this modified code, reaction rate equations were solved for the following 15 species: e, NO2( - ), O( - ), O2( - ), O3( - ), N2(+), NO(+), O(+), O2(+), N, NO, N2O, NO2, O, and O3. The calculations were made for a 4:1 mixture of N2 and O2 at 1 torr total pressure and 300K. Rate constants as given by Keneshea and Fowler (see AD-646 975) were used. The solutions are presented as number densities versus time after the start of the irradiating electron beam. A description of the modified code is presented. (Author).
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1062
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 970
Get Book Here
Book Description
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.
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1264
Get Book Here
Book Description
Author: Elmar R. Reiter
Publisher:
ISBN:
Category : Dynamic meteorology
Languages : en
Pages : 392
Get Book Here
Book Description
Author: T. J. Keneshea
Publisher:
ISBN:
Category : Atmospheric ionization
Languages : en
Pages : 228
Get Book Here
Book Description
A one-dimensional computer simulation of the composition and the dynamics of the mesosphere and lower thermosphere between 50 and 400km is presented. The model is based on a numerical solution of large sets of partial differential equations for the conservation of mass and momentum for individual gases in an atmosphere with constant temperature and turbulent diffusion coefficient profiles. Incorporated into the model are 56 different neutral and ionic atmospheric species involved in 215 chemical and photochemical reactions. Distributions of many of the constituents are presented as determined from an application of the computer code to a midlatitude winter environment. Included are tables of the photodissociation rate coefficients as functions of the column densities of molecular oxygen and ozone for several of the atmospheric gases. Finally, the complete computer code is presented along with a detailed explanation of its structure and instructions for its use. Additional keywords: finite difference equations; equations of state.
Author:
Publisher:
ISBN:
Category : Geophysics
Languages : en
Pages : 512
Get Book Here
Book Description
Author: Thomas J. Keneshea
Publisher:
ISBN:
Category : Chemical kinetics
Languages : en
Pages : 142
Get Book Here
Book Description
One way to acquire a better understanding of the formation and destruction of ionization in the atmosphere is through the solution of the system of time-dependent reaction rate equations. These ordinary differential equations form a simultaneous set each question of which describes the time rate of change of a particular atmospheric constituent. In the general problem, all the molecules and atoms whether neutral, charged, or excited, as well as the free electrons would be included. A computer program is presented for developing the numerical solution to this problem. The method of solution of the set of equations uses a fourth order Runge Kutta integration with a variable mesh. When a species enters its quasi-equilibrium state, its differential equation is removed from the set and its equilibrium equation is inserted into the simultaneous algebraic set. The algebraic set is solved by the method of successive substitutions. The over-all solution is obtained by iteration between the differential and the algebraic sets. The ability of the computer program to develop extensive solutions is demonstrated by several examples taken under different conditions.
