Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 13 of 13 for “"Velocity distribution function"”.
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Utilizing an ExB probe for obtaining ion velocity distribution function for an electric propulsion system
… diagnostics capable of resolving ion-specific velocity distributions with high fidelity. This dissertation presents a comprehensive theoretical and experimental investigation of the ExB probe as a quantitative diagnostic for obtaining ion velocity distribution functions (IVDFs) in EP systems. …
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Masses of globular clusters
Central velocity dispersions have been derived for 10 globular clusters from high dispersion (6.7A mm-1) coude spectra of the integrated light. Two methods were used. The first involved the comparison of the cluster spectra with star spectra convolved with an appropriate velocity distribution …
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Masses of globular clusters
Central velocity dispersions have been derived for 10 globular clusters from high dispersion (6.7A mm-1) coude spectra of the integrated light. Two methods were used. The first involved the comparison of the cluster spectra with star spectra convolved with an appropriate velocity distribution …
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Modeling reactive rarefied systems using a novel quasi-particle Boltzmann solver
… describes a system with a discretized, truncated velocity distribution function. The resulting fixed-velocity, variable weight quasi-particles enable smooth variation of macroscopic properties. The distribution function description enables use of a variance reduced collision model, greatly …
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Diagnostics and modelling of an inductively coupled RF low-pressure low-temperature plasma
… collision processes together influence the velocity distribution function of ions at the boundary surfaces.
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An Approximation for the Twenty-One-Moment Maximum-Entropy Model of Rarefied Gas Dynamics
… which hyperbolicity is lost. Unfortunately, the velocity distribution function associated with the twenty-one moment model is an exponential of a fourth-order polynomial. Such a function cannot be integrated in closed form, resulting in closing fluxes that can only be obtained through complex …
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Modeling and Observation of He+ Pickup Ions in the Inner Heliosphere
… with the solar wind. Typically, pickup ion distributions have been described in terms of a velocity distribution function that evolves through fast pitch angle scattering followed by adiabatic cooling during radial transport in the reference frame of the solar wind [e.g., Vasyliunas & …
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Rates of evaporation of small drops at low pressures
… by an integral involving the product of the velocity distribution (the density of molecules in velocity space) and the condensation coefficient; the probability or a molecule condensing on impact with the surface. In the presence of a concentration gradient, according to Chapman and Enskog's …
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Wave-particle interactions in the solar wind and solar flares
… about the wave power spectra and/or particle velocity distributions, for example, taking the wave power spectra to be isotropic, or taking all the wavevectors to be parallel to the background magnetic field. In this work, we investigate resonant interactions between particles and weakly …