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Author: HAROLD W. WOOLLEY
Publisher:
ISBN:
Category :
Languages : en
Pages : 1
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Book Description
This report includes: EFFECTS OF INTERMOLECULAR INTERACTIONS ON THERMODYNAMIC PROPERTIES OF GASES AT HIGH TEMPERATURES AND PRESSURES, by Harold W. Woolley. 1962, 22p. incl. illus. The calculation of thermodynamic properties of gases at high temperature using ion solution theory is analyzed in regard to various details. Earlier work based on rigid sphere ions is enlarged on briefly. An extension to a more general case of realistic pair interactions is also obtained. With Debye screened ionic interactions, a study is made of effects of repulsions and both continuum and bound states for ionic attractions; simple approximate representations of the interaction effects for the two free particle interaction cases are given. For the bound states, the finite number of states available for occupancy as a result of Debye screening is explicitly indicated, and a numerical method to adjust from an arbitrary state sum to the ''Debye screened'' sum is explained. An extensive compensation between bound states just below the continuum and a partial state paucity within the continuum are also noted. Other details considered include the estimation of the dielectric constant up into the region of high density and high temperature, the semi-empirical estimation of nonbonding pair interactions involving neutral and ionized species, and corresponding virial-type exclusion effects. A table of second virials for constituents of air up to 20,000 K is included. (Author).
Author: HAROLD W. WOOLLEY
Publisher:
ISBN:
Category :
Languages : en
Pages : 1
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Book Description
This report includes: EFFECTS OF INTERMOLECULAR INTERACTIONS ON THERMODYNAMIC PROPERTIES OF GASES AT HIGH TEMPERATURES AND PRESSURES, by Harold W. Woolley. 1962, 22p. incl. illus. The calculation of thermodynamic properties of gases at high temperature using ion solution theory is analyzed in regard to various details. Earlier work based on rigid sphere ions is enlarged on briefly. An extension to a more general case of realistic pair interactions is also obtained. With Debye screened ionic interactions, a study is made of effects of repulsions and both continuum and bound states for ionic attractions; simple approximate representations of the interaction effects for the two free particle interaction cases are given. For the bound states, the finite number of states available for occupancy as a result of Debye screening is explicitly indicated, and a numerical method to adjust from an arbitrary state sum to the ''Debye screened'' sum is explained. An extensive compensation between bound states just below the continuum and a partial state paucity within the continuum are also noted. Other details considered include the estimation of the dielectric constant up into the region of high density and high temperature, the semi-empirical estimation of nonbonding pair interactions involving neutral and ionized species, and corresponding virial-type exclusion effects. A table of second virials for constituents of air up to 20,000 K is included. (Author).
Author: Dennis Otto Allison
Publisher:
ISBN:
Category : Gases at high temperatures
Languages : en
Pages : 226
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 52
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The partition function corresponding to an equation of state for a high-temperature, high-density gas suggested by J.S. Rowlinson was derived. The equations for selected thermodynamic properties of the gas are obtained from this partition function using statistical thermodynamics. These equations are used to calculate results for the case of hydrogen in the range of temperature between 500K and 3000K and in the range of density between 1 and 2000 amagats.
Author: Roger A. Svehla
Publisher:
ISBN:
Category : Gases at high temperatures
Languages : en
Pages : 132
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Viscosities and thermal conductivities, suitable for heat-transfer calculations, were estimated for about 200 gases in the ground state from 100° to 5000° K and 1-atm pressure. Free radicals were included, but excited states and ions were not. Calculations for the transport coefficients were based upon the Lennard-Jones (12-6) potential for all gases. Intermolecular force constants for this potential were obtained from experimental viscosity data or were estimated when data were not available. The same set of constants was used to calculate both viscosity and conductivity. An Eucken-type correction for exchange between internal and translational energies was made for thermal conductivities of polyatomic gases.
Author: Mary M. Williams
Publisher:
ISBN:
Category : Combustion gases
Languages : en
Pages : 88
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Author: John Osborne
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: J. R Downey (Jr)
Publisher:
ISBN:
Category :
Languages : en
Pages : 34
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The dual purpose of this report is to address the problems involved in extending the JANAF Thermochemical Tables for monatomic gases to higher temperatures (e.g. T> 6000 K), and the formulation of more definitive procedures for producing the tables in their present format (T
Author: M. Capitelli
Publisher: Springer Science & Business Media
ISBN: 9400902670
Category : Science
Languages : en
Pages : 798
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Book Description
Molecular Physics and Hypersonic Flows bridges the gap between the fluid dynamics and molecular physics communities, emphasizing the role played by elementary processes in hypersonic flows. In particular, the work is primarily dedicated to filling the gap between microscopic and macroscopic treatments of the source terms to be inserted in the fluid dynamics codes. The first part of the book describes the molecular dynamics of elementary processes both in the gas phase and in the interaction with surfaces by using quantum mechanical and phenomenological approaches. A second group of contributions describes thermodynamics and transport properties of air components, with special attention to the transport of internal energy. A series of papers is devoted to the experimental and theoretical study of the flow of partially ionized gases. Subsequent contributions treat modern computational techniques for 3-D hypersonic flow. Non-equilibrium vibrational kinetics are then described, together with the coupling of vibration-dissociation processes as they affect hypersonic flows. Special emphasis is given to the interfacing of non-equilibrium models with computational fluid dynamics methods. Finally, the last part of the book deals with the application of direct Monte Carlo methods in describing rarefied flows.
Author: J. O. Hirschfelder
Publisher:
ISBN:
Category : Air
Languages : en
Pages : 52
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Author: John Osborne
Publisher:
ISBN:
Category :
Languages : en
Pages :
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