Other Engineering Commons^™

Uncertainty Of Stereo Piv Calibration And Self-Calibration, Braydon J. Williams

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Particle image velocimetry (PIV) is a widely used fluid measurement technique. Three dimensional PIV data or stereo PIV is acquired using two cameras. Stereo cameras are calibrated from camera coordinates, pixels, to real world units such as millimeters using calibration models. Stereo calibration is fundamental to the accuracy of a PIV measurement. In this thesis, the accuracy of the stereo calibration is assessed. The mean error of stereo calibration was found to be 0.23%.

Analysis Of Cutthroat Flume Discharge Ratings, Liyan Ren

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Sixteeen sets of original laboratory data collected by many investigators for various Cutthroat flume sizes are thoroughly reviewed and organized. Best-fit discharge parameters are obtained by performing the free-flow analysis and the submerged-flow analysis. Then, the transition submergence can be calculated. Afterwards, the unified free-flow and submerged-flow discharge parameters are developed for each flume size in order to generalize the calibrations for Cutthroat flumes. This is a very tedious process requiring a trial-and-error approach. Finally, comparisons are made of the measured laboratory discharges with the predicted discharges for both free flow and submerged flow using both the best-fit and the …

Air Pressures Over Reservoir, Canal, And Water Catchment Surfaces Exposed To Wind, Allen Ray Dedrick

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Surface air pressure differentials that occur over reservoirs, canals, and water-catchment aprons in high-wind conditions were determined by the use of models in a wind tunnel. Such information was needed concerning the magnitude and location of destructive wind forces on water barriers constructed of exposed flexible membrane liners. Rigid models, without a membrane, were used to measure airpressure differentials.

Air-pressure differentials were dependent on geometric configuration and were independent of viccous forces above the critical Reynolds number which was determined experimentally. The geometric factors studied with respect to reservoirs and canals included approach slope, approach slope length, leeward slope, and …

Streamflow Forecast Of Bear River At Harer, Idaho, J. M. Crook

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Accurate forecasts of stream flow produce direct benefits for the populace of a watershed which can be measured in terms of cash income. In 1946 in Deschutes and Crook counties of Oregon, the stream flow forecast based on snow surveys indicated appreciably greater than average runoff to be anticipated during the course of the subsequent irrigation season (10). Accordingly, some 6500 acres of agricultural land in the area, normally not cropped, were seeded and successfully irrigated. The cash value of crops, grown on this usually unproductive land, was estimated to be more than half a million dollars.

Conversely, when short …