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Showing 1 to 20 of 76 for “"drop size"”.
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Radar Cross Sections From Drop Size Spectra
Made available in DSpace on 2014-12-08T22:24:01Z (GMT). No. of bitstreams: 1 6612392.pdf: 3307127 bytes, checksum: 3465ce83457df313a3a1c95d6134b47b (MD5) Previous issue date: 1966
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A statistical analysis of drop size measurements in New England rainstorms.
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Meteorology, 1972.
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Effects of drop size and drop velocity on cooling characteristics of sprays
The effect of drop size and drop velocity on the cooling characteristics of sprays was investigated in this study. Various line pressures and distances from the nozzle were used to obtain Sauter mean drop sizes between 200 and 300 microns, and velocities between 80 and 130 m/s. Local heat flux data …
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RELAMPAGO-CACTI drop size distribution observations and the implications for cloud and hydrologic studies
Comparisons of drop size distributions (DSD) properties and rainfall modes among three deep convective regions (the U.S. Southern Great Plains, in Córdoba Province in subtropical South America, and Manacapuru in central Amazonia) where heavy rain-producing systems contribute the majority of …
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Modelling of Rainfall Drop Size Distributions for Application in Fade Prediction on Earth-Space Paths
… measurement of rain rate and rainfall drop size distribution (DSD) at the earth station location. <br/><br/>This thesis fits the standard lognormal and gamma distributions to one-minute slices of rainfall DSDs captured between 2003 and 2013 at the Chilbolton Observatory in southern …
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Effect of Drop Size and Impact Velocity on the Detachment of Soils Under Simulated Rainfall
Made available in DSpace on 2014-12-09T20:03:09Z (GMT). No. of bitstreams: 1 7020930.pdf: 3763884 bytes, checksum: 401b4f04b4c124a0c7da3dc3942f54e0 (MD5) Previous issue date: 1970
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Mechanisms of liquid extraction in a pilot plant sieve plate column
The literature pertinent to droplet hydrodynamics and mass transfer in perforated (sieve)plate liquid-liquid extractor columns has been reviewed. An experimental investigation was conducted in a 450 mm diameter perforated plate extractor with four plates using four different designs with holes of …
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Messung und Modellierung des Spaltungs- und Koaleszenzverhaltens von Tropfen bei der Extraktion
… columns often neglect the polydispersity of drops. By contrast, new models are based on balances of the drop population in the column. Hence, they promise more detailed results. By means of these models the breakup and coalescence of drops and the resulting drop size alterations are …
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Transformation of Rainfall by Plant Canopy (Erosion)
… factors in models of splash detachment are drop size, drop velocity and rainfall intensity. The influence of plant canopy on drop size and on spatial redistribution of rainfall is investigated.
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Liquid-liquid extraction in a pilot scale rotating disc contactor
… of extractor and the relevant phenomena, such as droplet break-up and coalescence, drop mass transfer and axial mixing has been revjewed. Experiments were performed using the system C1airsol-350-acetone-water and the effects of drop size, drop size-distribution and dispersed phase hold-up on the …
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Study of slant path attenuation ratios derived from a dual-polarized radar
… which used a dual-polarized radar to estimate drop size distributions on a slant path between Blacksburg, Virginia, and the Intelsat VA F10 satellite. The effect of varying drop size distributions on attenuation ratios is discussed. An uplink power control simulation is developed using the …
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A study of liquid-liquid extraction in a sieve plate column
… surveyed. Mass transfer characteristics during drop formation, rise and coalescence, and related models were also reviewed. Important design parameters i.e. flooding, dispersed phase hold-up, drop size distribution, mean drop size, coalescence/flocculation zone height beneath a plate and jetting …
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An acoustic water tank disdrometer
… representation of the numbers of large raindrops than is available from current commercial instruments. This thesis describes the development of an acoustic instrument that determines rain parameters from the sound of raindrops falling into a tank of water. It is known as the acoustic water …
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Coalescence of secondary dispersions in fibrous beds
… behaviour and methods of separation of droplets less than one hundred micrometres in diameter has been reviewed with particular reference to fibrous bed coalescers. The main operating parameters were identified as inlet drop size distribution, phase ratio, superficial velocity and the …
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Studies of the Coalescence of Dispersions in Particulate Packings
Droplet hydrodynamics and coalescence mechanisms in a packed bed have been studied using a mono-sized primary inlet dispersion with a packing of equal sized glass spheres. Four systems were studied and a correlation was developed using a dimensional analysis to evaluate the parameters affecting the …
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Cloud Chemical Heterogeneity and Its Influence on Aqueous sulfur(IV) Oxidation
… in chemical composition among cloud and fog drops of diverse sizes were investigated at several locations across the United States. Chemical species including acidity, total sulfur (IV), hydrogen peroxide, formaldehyde, hydroxymethanesulfonate (HMS) and trace metals iron and manganese were …
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The effect of drop concentration on deposition in vertical annular two-phase flow
… rate constant is found to vary inversely with drop concentration (i.e. the rate of deposition is independent of concentration). This deviation causes concern when predicting dryout in two phase applications. To better understand this process, information on its drop size and on the behavior of …
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Mass transfer characteristics of two-aqueous-phase liquid-liquid mixtures
… transfer rates were studied using the falling drop method. Cibacron Blue 3 GA dye was the transferring solute from the salt phase to the PEG phase. Measurements were undertaken for several concentrations of the dye and the phase-forming solutes and with a range of different drop sizes, e.g. …
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Solvent extraction of phosphoric acid
… concentration, but power input had no effect. Drop size was found to reduce with acid concentration and power input. For the continuous studies a novel horizontal mixer~settler cascade was designed, constructed and operated using pure and impure acid with MIBK as the solvent. The cascade …
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The application of IBM PC's and distrometers in a satellite propagation experiment
… experiment. The uses and methods of collecting drop size distribution are discussed as are the uses of IBM-PC's for both data collection and control. Methods of requiring the PC's to operate in real time are also included.
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