Now showing items 41-50 of 1506
Lagrangian model simulations of molecular mixing, including finite rate chemical reactions, in a temporally developing shear layer
(The American Institute of Physics, 1991-05)
A local integral model for approximate simulations of the molecular mixing and chemical reaction processes in turbulent reacting flows is presented. The model is based on recent experimental results, which show that ...
A test of QCD based on 3-jet events from Z0 decays
(Elsevier, 1991-07-18)
We present a study of 43 000 3-jet events from Z0 boson decays. Both the measured jet energy distributions and the event orientation are reproduced by second order QCD. An alternative model with scalar gluons fails to ...
Direct numerical simulations of fluid flow, heat transfer and phase changes
(The American Institute of Physics, 1997-01-10)
Direct numerical simulations of fluid flow, heat transfer, and phase changes are presented. The simulations are made possible by a recently developed finite difference/front tracking method based on the “one-field” formulation ...
Spin fluids in van Stockum cylinders
(IOP Publishing Ltd, 1990-03-01)
Within general relativity, the stress-energy content of van Stockum's two-dimensional dust interior is extended to include a two-dimensional spin fluid. The metric and spin-fluid parameters are expressed in terms of one ...
Efficiency and angular resolution calculations for a prototype multiple Compton scatter camera
(Elsevier, 1994-06-15)
Monte Carlo simulations were performed to optimize the layer thickness of a Compton camera which utilizes multiple Compton scatterings. The optimum layer thickness was found to be less than 0.5 mm for 150 keV, 2 mm for 511 ...
Elongational viscosity by fiber spinning
(Steinkopff-Verlag; Steinkopff ; Springer Science+Business Media, 1990-09)
Isothermal melt, fiber-spinning was recently analyzed by means of a nonlinear, integral, constitutive equation that incorporates shear history effects, spectrum of relaxation times, shear-thinning, and extension thinning ...
Separation of paramagnetic and ferrimagnetic susceptibilities using low temperature magnetic susceptibilities and comparison with high field methods
(Elsevier, 1994-02)
Magnetic susceptibility of rocks can be dominated by diamagnetic and paramagnetic matrix minerals, ferrimagnetic and antiferromagnetic trace minerals, or a combination. The interpretation of magnetic fabric data (anisotropy ...
On spherically symmetric cosmology in Riemann-Cartan spacetime with spin-density
(IOP Publishing Ltd, 1994-10-01)
We develop the average effective energy-momentum tensor for a spherically symmetric cosmology with randomly oriented spin using the improved energy-momentum tensor in the framework of the self-consistent Einstein-Cartan ...
A millimeter wave technique for measuring ice thickness on the Space Shuttle's external tank
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 1991-12)
The external fueltank of the Space Shuttle contains extremely lowtemperature propellents. A layer of material known as SOFI (Spray-On Foam Insulation) covering the outside of the fueltank provides thermal insulation between ...
Buoyancy-driven turbulent diffusion flames
(Elsevier, 1991-08)
A fundamental dimensionless number for pool fires, , in proposed. Here [sigma][beta] and Ra[beta] denote a flame Schmidt number and a flame Rayleigh number. The sublayer thickness of a turbulent pool fire, [eta][beta], is ...