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 11 of 11 for “"Wall effect"”.
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Empirical Evaluation of Ground, Ceiling, and Wall Effect for Small-Scale Rotorcraft
<p>Ground effect refers to the apparent increase in lift that an aircraft experiences when it flies close to the ground. For helicopters, this effect has been modeled since the 1950's based on the work of Cheeseman and Bennett, perhaps the most common method for predicting hover performance due to …
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The rheology and flow behaviour of high concentration mineral slurries
… for the cause of the anomalous behaviour: Effective slip analysis - corrects the measured data for effective slip. Dense-Phase Model - based on the sliding friction between solid particles and the tube wall. Wall Effect - based on a reduction of in situ concentration due to a wall effect. …
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After Exodus : re-occupation of the metropolitan wall
… a restricted exclave encircled by a forbidding wall -- effect, a prison on the scale of a metropolis, and one in which people sought refuge voluntarily. Over the past forty years, similar walls have grown in the city of Belfast in an increasing effort to divide its Catholic and Protestant …
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Operational parameters of the filamentous microbial process
… compaction, and cohesion between particles. The effect of varied diameter cylinders revealed that the true settleability of the sludge could not be determined in cylinders with a diameter less than 10 cm because smaller diameter settling tubes accentuated the "wall effect." The SVI and suspended …
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An On-Road Investigation of Commercial Motor Vehicle Operators and Self-Rating of Alertness and Temporal Separation as Indicators of Driver Fatigue
… relationships in the data are also discussed. A "wall" effect was found to exist for minimum time-to-collision values at 1.9 seconds. That is, none of the participants who participated in this research effort exhibited following behaviors with less than a 1.9-second time-to-collision criterion. In …
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Characterisation of the effective thermal conductivity in the near wall region of a packed pebble bed
The effective thermal conductivity is an important parameter that is representative of the overall heat transfer in a packed bed of spheres. An accurate prediction of the effective thermal conductivity is necessary for the design and analysis of packed pebble bed gas-cooled reactors, especially …
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Controls on the distribution of landslides triggered by the 2008 Wenchuan earthquake, Sichuan Province, China
… This is superimposed over a marked hanging wall effect, along with clear geological and topographic controls on landslide occurrence. Through generalised linear modelling, peak ground acceleration attenuation patterns, hillslope gradient, relief, local elevation and geology are identified as …
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Near Wall Behavior of Vortical Flow around the Tip of an Axial Pump Rotor Blade
… chord tip clearance with and without moving endwall simulation. Experimental measurements have been completed in Virginia Tech low speed linear cascade wind tunnel. A 24" access laser-Doppler velocimeter (LDV) system was developed to make simultaneous three-velocity-component measurements. The …
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Experimental evaluation and modeling of ground, ceiling and wall effects for small-scale quadcopters
L'abstract è presente nell'allegato / the abstract is in the attachment
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Ensayos de información y extracción de probetas testigo en hormigones autocompactantes
… variables of the samples, such as microcracking, wall effect, boundary conditions, etc. Thirty 50×50×100 cm Self-Consolidating Concrete blocks were prepared for this study. From the same batch of each block three 15×30 cm cylindrical specimens and two 15×15 cm cubic specimens were also casted. In …
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Optimización de la distribución de catalizadores en hidrotratamiento de destilados medios
… the liquid phases and gaseous, considering the effect of the gas-liquid mass transfer, the efficiency of wet and a factor of global effectiveness in the system. The coefficients of the reaction rates where evaluated on the basis of experimental data modifying those that appear in the …