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Showing 1 to 20 of 22 for “"monatomic"”.
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Prandtl-Meyer expansion of an ionizing monatomic gas
The Prandtl-Meyer flow of a pure, monatomic gas, including the effects of ionization and recombination, has been numerically calculated. Expressions describing the thermodynamic state of the gas mixture were obtained from statistical mechanics, the components making up the mixture being considered …
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Ab Initio Computation of Radiative Properties of Monatomic Hydrogen
<p>With renewed interest in planetary atmospheric entry, descent, and landing, NASA has noted a need for improved physics modeling in computational fluid dynamics. Uncertainty in experimental data used in radiation heat transfer computations leads to “over-engineering” of entry body heat shields, …
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On the Structure of Shock Waves in Monatomic Gases
Made available in DSpace on 2014-12-05T20:34:23Z (GMT). No. of bitstreams: 1 6206210.pdf: 2495420 bytes, checksum: b88e493c044128fa135dbc00d1fc8bf0 (MD5) Previous issue date: 1962
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A Correlated 1-D Monatomic Condensed Matter System: Experiment and Theory
… realized system is a self-assembled array of monatomic cobalt wires that are grown under ultra-high vacuum conditions on a vicinal copper (111) substrate using a recipe developed specifically for this work. This work experimentally demonstrates that this 1-D system undergoes a charge density …
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Thermodynamic and Transport Properties of Non-Equilibrium Partially Ionized Monatomic Gases
Made available in DSpace on 2014-12-09T17:13:29Z (GMT). No. of bitstreams: 1 6406163.pdf: 5364958 bytes, checksum: dbdb6055f63749cc7c62e096769a85f8 (MD5) Previous issue date: 1963
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Molecular dynamics modeling of normal shock waves in monatomic and polyatomic gas mixtures.
Large-scale molecular dynamics (MD) simulations using the Lennard-Jones potential are performed to study the structure of normal shock waves in dilute Nitrogen and mixtures of Helium-Argon and Helium-Xenon. The use of realistic MD simulations of normal shock waves promises to provide a more …
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The effect of departure from ideality of a multiply ionized monatomic gas on the performance of rocket engines
… have been investigated. The gas is assumed to be monatomic, electrically neutral, and thermal equilibrium (i.e., a one temperature fluid); but the composition of the gas is arbitrary, that is, multiple ionization of any degree is allowed. The thermodynamic variables are derived starting from the …
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Computational Modeling of the Axial-Cylindrical Inertial Electrostatic Confinement Fusion Neutron Generator
… build-up on the glass wall are included. Either monatomic or molecular ions and electrons are modeled in a monatomic or molecular background neutral deuterium gas. CHIMP code predictions are compared against experimental results for the C-Device operating between 10 and 30 kV of anode voltage, …
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Anharmonic Helmholtz free energy to O(lambdaâ ´) in the non- leading term approximation /|nby Leslie Wilk. -- 260 St. Catharines, Ont. : [s. n.],
… and in the non-leading term approximation for a monatomic facecentred cubic crystal with nearest neighbour c entralforce interactions. The numbers obtained were seen to vary by a s much as 47% from thos e obtai.ned in the leading term approximati.on,indicating that the latter approximati on is …
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Kinetic theory of piston problem and thermal disturbance by the ellipsoidal statistical model
… which gives the correct Prandtl number for a monatomic gas has been solved numerically. Also, the perturbation method proposed by Chu is also applied. Velocity, density, temperature and pressure distributions have been calculated at each time step for various piston speeds for the piston …
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Frequency Dependent Mechanical Properties of Elastic Metamaterials with Locally Resonant Microstructures
… energy propagation point of view. Based on the monatomic mass lattice model, two band gap formation mechanisms were proposed. For each representative element, considering the time period when effective mass velocity increases from zero to maximum, if the kinetic energy requirement is beyond the …
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Surface ordering of MBE grown 001 gallium(05) aluminum(05) arsenic: A theoretical study
… The growth parameters employed for the monatomic spices As are: fluxes 2{dollar}\sp\circ{dollar} A/sec, for cations with the cation to anion flux ratios 1: 10, and 1: 20. The growth parameter employ for the diatomic spices {dollar}As\sb2{dollar} are: fluxes 2{dollar}\sp\circ{dollar} …
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Application of [Lambda] to the fourth perturbation theory in calculating the equation of state of rare gas solids and fcc metals
… have calculated the thermodynamic properties of monatomic fcc crystals from the high temperature limit of the Helmholtz free energy. This equation of state included the static and vibrational energy components. The latter contribution was calculated to order A4 of perturbation theory, for a range …
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Adsorption at the nanoparticle interface for increased thermal capacity in solar thermal systems
… have been observed in literature for simple, monatomic fluids. The results provide new insight into the nature of adsorption at the liquid-solid interface in more complex fluid and particle systems that can be harnessed for enhanced thermal capacity in HTFs.
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Analysis and mitigation of key losses in a multi-stage 25-100 K cryocooler
… twice the number of series expanders, assuming a monatomic working fluid. The second area of research focused on the design of the cryocooler's unique floating piston expanders. A variety of losses affect the performance of these expanders; these range from the obvious to the obscure (e.g., the …
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Printable graphene sensing systems for drug and alcohol detection
… decades, there has been a growing interest in monatomic and monomolecular sheets obtained through exfoliation of layered compounds. Despite this, none of these materials have opened the door to the design of more sensitive and reliable chemical sensors in the way that graphene has. Various …
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The Effects of Atomic Oxygen on the Outgassing Properties of Spacecraft Materials
… to ensure the safety of a spacecraft. AO is monatomic oxygen (O1) that is created when Ultraviolet (UV) radiation photochemically disassociates diatomic oxygen (O2) in space. AO is the dominant atmospheric constituent between 175 and 600 km, and is a great concern in low earth orbits. Orbital …
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Studies in the theory of solids
… 50 ~ E ~ 100 eV incident on clean surfaces of monatomic metals. These discrepancies arise because the averaging does not remove completely the effects of multiple scattering from strongly scattering ion cores. A general (geometrical) formulation of the relation between the kinematical and …
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