Quantum-mechanical kinetic theory of loaded spheres. II.
Quantum mechanical kinetic theory of gas loaded spheres to obtain limit of transport coefficients and relaxation time
KINETIC THEORY↗
SEARCH · Engineering Papers
Results for “Quantum kinetic theory”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Quantum-mechanical kinetic theory of loaded spheres.
Quantum mechanical calculation of transport coefficients of gas of loaded spheres, obtaining scattering amplitudes and cross sections
TRANSPORT COEFFICIENT↗
Kinetics of unimolecular breakdown. VIII - The Lindemann-Hinshelwood mechanism.
Quantum mechanical theory of thermal unimolecular breakdown kinetics of activated molecule in inert host gas based on Lindemann-Hinshelwood mechanism
Levine, R. D.↗
Kinetic theory of almost classical fluids.
Fokker-Planck equation with first order quantum correction extended to mixtures by rearranging terms, noting friction tensor role
Davis, H. T.↗
Fundamental Studies Connected with Electrochemical Energy Storage
Papers are presented which deal with electrochemical research activities. Emphasis is placed on electrochemical energy storage devices. Topics discussed include: adsorption of dendrite inhibitors on zinc; proton discharge process; electron and protron transfer; quantum mechanical formulation of electron transfer rates; and theory of electrochemical kinetics in terms of two models of activation; thermal and electrostatic.
Buck, E.↗
Effect of molecular angular momentum on the thermal conductivity of a multicomponent gas mixture
The effects of molecular angular momentum (spin polarization) on the thermal conductivity of a multicomponent gas mixture are considered. The Wang Chang-Uhlenbeck approach to the kinetic theory of gases with internal states is used. Formal results are obtained for the thermal conductivity of a gas mixture of uniform composition. These results are given in terms of the quantum mechanical degeneracy-averaged cross section.
Biolsi, L.↗
Discrete Rotational Energy for Polyatomic Molecules in Direct Simulation Monte Carlo
The environments experienced by vehicles upon entry into planetary atmospheres generally result in severe aerothermodynamic loading. These flows are characterized by the formation of strong shock waves, behind which high temperatures and non-equilibrium environments are generated, and the accurate prediction of internal energy relaxation and chemical kinetics becomes important. This manuscript focuses on the internal relaxation of the rotational energy of polyatomic molecules. Previous work has described the implementation of a discrete rotational energy model for diatomic molecules (linear rotators). Later, Gimelshein et. al extended this model to include polyatomic molecular internal energies. However, they did not include details on how to generate the particles at equilibrium conditions and centrifugal distortion was not included in their model. The purpose of the present study is to extend the afore-mentioned models to the treatment of discrete rotational energy in polyatomic molecules with the addition of centrifugal distortion. An overview of the background theory needed for the implementation of the model will be given followed by the model itself and verification of the model. For example, sampled versus Boltzmann distributions are compared in Figure 1 for CH3 (oblate rotator – two quantum numbers) and examples of thermal relaxation behavior for linear and non-linear rotators are presented in Figure 2. In addition, comparisons of thermophysical properties will be presented, as well as examples of adiabatic relaxation and application to hypersonic flow.
Rarefied Gas Dynamics↗