This report describes a three-dimensional finite -difference model (SWIFT) which is used to simulate flow and transport processes in geologic media. The model was developed for use by the Nuclear Regulatory Commission in the analysis of deep geologic nuclear waste -disposal facilities. This document, as indicated by the title, is a user's manual and is intended to facilitate the use of the SWIFT simulator . Mathematical equations, submodels, application notes, and a description of the program itself are given herein.In addition, a complete input data guide is given along with several appendices which are helpful in setting up a data -input deck.iii
This paper describes a novel approach for separating the phases in a two-phase flow and measuring their velocity fields simultaneously. The method is an extension of two-colour particle image velocimetry and utilizes colour recording and fluorescently doped seed particles in one phase of the flow. This concept is developed into a number of practical optical recording systems. The simplest of these has been evaluated experimentally and some proof-of-principle results obtained. Image processing algorithms are employed to separate the particle images from each phase of the flow and between the first and second illumination pulse. The experimental data are presented from a laboratory flow rig consisting of two impinging jets.
Experimental modal analysis of multifrequency vibration requires a measurement system with appropriate temporal and spatial resolution to recover the mode shapes. To fully understand the vibration it is necessary to be able to measure not only the vibration amplitude but also the vibration phase. We describe a multipoint laser vibrometer that is capable of high spatial and temporal resolution with simultaneous measurement of 256 points along a line at up to 80 kHz. The multipoint vibrometer is demonstrated by recovering modal vibration data from a simple test object subject to transient excitation. A practical application is presented in which the vibrometer is used to measure vibration on a squealing rotating disk brake.
We describe a high-speed digital speckle pattern interferometer incorporating a line-scan camera and a waveguide phase modulator for the measurement of complex deformation (vibration phase and amplitude) at audio acoustic frequencies. Experimental data show continuous phase-stepped recovery of out-of-plane surface deformation in one dimension, obtained at 100 kHz with 2pi/20-rad (0.02-mum) displacement resolution, for surface velocities of 3.2 mm s>(-1) .
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