نتایج جستجو برای: predicting gas density
تعداد نتایج: 761424 فیلتر نتایج به سال:
This paper presents helpful expressions predicting the filling time of gaseous species inside photonic crystal fibres. Based on the theory of diffusion, our gas-filling model can be applied to any given fibre geometry or length by calculating diffusion coefficients. This was experimentally validated by monitoring the filling process of acetylene gas in several fibre samples of various geometrie...
We present three-dimensional numerical simulations of particle clumping and planetesimal formation in protoplanetary disks with varying amounts of solid material. As centimeter-size pebbles settle to the midplane, turbulence develops through vertical shearing and streaming instabilities. We find that when the pebbleto-gas column density ratio is 0.01, corresponding roughly to solar metallicity,...
Density functional theory calculations were carried out to investigate the structural and electronicproperties of the adsorption of O3 molecules on AlP-codoped monolayers to fully exploit the gas sensingcapability of these two-dimensional materials. Various adsorption sites of O3 molecule on the considerednanosheets were examined in detail. The side oxygen atoms of the O3 mole...
We present three-dimensional numerical simulations of particle clumping and planetesimal formation in protoplanetary disks with varying amounts of solid material. As centimeter-size pebbles settle to the midplane, turbulence develops through vertical shearing and streaming instabilities. We find that when the pebbleto-gas column density ratio is 0.01, corresponding roughly to solar metallicity,...
This paper is addressing of a coupling Large-eddy simulation (LES) and RANS turbulence models with mixture fraction/probability density function as combustion model. The two have been implemented to simulate ethanol-air spray combustion. gas phase described the Eulerian approach while liquid designed using Lagrangian framework. LES/PDF obtained statistically. sub-grid scale energy equation used...
Tunnel ionizing neutral gas with the self-field of a charged particle beam is explored as a possible way of creating plasma sources for a plasma wakefield accelerator [Bruhwiler et al., Phys. Plasmas (to be published)]. The optimal gas density for maximizing the plasma wakefield without preionized plasma is studied using the PIC simulation code OSIRIS [R. Hemker et al., in Proceeding of the Fif...
For an ideal D-dimensional Fermi gas under generic external confinement we derive the correcting coefficient (D − 2)/3D of the von Weizsacker term in the kinetic energy density. To obtain this coefficient we use the Kirzhnits semiclassical expansion of the number operator up to the second order in the Planck constant h̄. Within this simple and direct approach we determine the differential equati...
A Hartree-Fock mean-field theory of a weakly interacting Bose-gas in a quenched white noise disorder potential is presented. A direct continuous transition from the normal gas to a localized Bose-glass phase is found which has localized short-lived excitations with a gapless density of states and vanishing superfluid density. The critical temperature of this transition is as for an ideal gas un...
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