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Showing 1 to 20 of 20 for “"Particle Sizing"”.
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Laser diffraction particle sizing : sampling and inversion
The inverse problem of obtaining particle size distributions from observations of the angular distribution of near forward scattered light is reexamined. Asymptotic analysis of the forward problem reveals the information content of the observations, and the sources of non-uniqueness and instability …
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Laser diffraction particle sizing : sampling and inversion
Thesis (Ph. D.)--Joint Program in Oceanographic Engineering (Massachusetts Institute of Technology, Dept. of Ocean Engineering; and the Woods Hole Oceanographic Institution), 1987.
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Validation and implementation of optical diagnostics for particle sizing in rocket motors
Aluminum oxide(Al2O3) particles of known size distribution were cast into a solid propellant which burned at temperatures less than the melting point of Al2O3. Thus, particles of known size distribution existed at the nozzle inlet and in the plume. Malvern particle sizing instruments were used to …
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A charge coupled device based optical tomographic instrumentation system for particle sizing.
… tomographic instrumentation system used for sizing particles. Four CCD linear image sensors are configured around an octagonal shaped flow pipe for a four projections system. The measurement system is explained and uses four CCD linear image sensors consisting of 2048 pixels with a pixel size …
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Application of a Non-intrusive Optical Non-spherical Particle Sizing Sensor at Turboshaft Engine Inlet
… dangerous. In order to combat these issues, a particle sensor with the ability to monitor in-stream particulate size, shape, and mass flow rate is necessary. Our team with the Advanced Propulsion and Power Laboratory developed a non-intrusive optical sensor that is able to characterize …
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Integration and Validation of Flow Image Quantification (Flow-IQ) System
… to integrate, validate, and document, a digital particle image quantification (Flow-IQ) software package developed in conjunction with and supported by Aeroprobe Corporation. The system is tailored towards experimental fluid mechanics applications. The second aim of this work was to test the …
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Development of a novel in vitro system for nasal drug delivery development
… experimental protocols that allow aerosol particle-sizing, together with videography, has shown that the new factors investigated, humidity and airflow, have a measurable effect on the delivered dose from a typical nasal pump. Similarly, adaptation of the chamber to fit under a confocal …
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Particle formation in ambient mass spectrometry
A particle sizing system was developed that couples a light scattering particle sizer with a differential mobility analyzer for particle detection and elucidation with the capability for measuring particle sizes in the range of 10 nm to 20 μm. The particle sizing system was used to investigate …
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Effect of driving cycles on the particulate mass and number emissions from in-use heavy heavy-duty diesel vehicles
This study focused primarily on the particle mass and number emission from various in-use heavy heavy-duty diesel vehicles operating on different driving cycles. Chemical speciation results are also presented to discuss the formation and composition of particles emitted during various cycles. Tests …
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Modeling and measurement of sodium chloride and ammonium sulfate droplet growth in laminar flow
… and humidity, and measured using optical particle sizing at multiple downstream positions. The model predicts the temporal evolution of droplet radius by solving the coupled mass and heat transfer equations with supersaturation determined from the modified K¨ohler equilibrium. Results show …
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A computer model of water-in-oil emulsion coagulation
… optical microscopy, creaming rates and laser particle sizing, the affects of changing surfactant concentration, salt concentration, pH and shearing time for emulsions of ammonium nitrate solution in heptane with CRILL 43 are shown. Equations are derived for converting creaming rate data to …
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The development of a geopolymer binder from the interbasaltic laterites of Northern Ireland
… production is presented. Influences of particle sizing, calciner type activator production, quality control measures and application development are presented. <br/><br/>This thesis has contributed to the body of research by bringing an idea regarding the use of locally available clays …
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High resolution scattering measurements for stationary particles
Particle characterization is important to the aerospace field because particle ingestion in propulsion engines can lead to catastrophic failures. It has been shown laser based methodologies can determine size and concentration of spherical particles by using light extinction. However, when one …
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Improving Evaporative Light Scattering Detector performance using Experiments and Modelling
… intensity). This study investigates the particle morphology and size distribution of analytes dried through an ELSD by employing multiple particle sizing techniques, including the Phase Doppler Particle Analyzer (PDPA), the Aerodynamic Aerosol Classifier (AAC), and the Scanning Mobility …
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The Effect Of Colloidal Stability On The Heat Transfer Characteristics Of Nanosilica Dispersed Fluids
Addition of nano particles to cooling fluids has shown marked improvement in the heat transfer capabilities. Nanofluids, liquids that contain dispersed nanoparticles, are an emerging class of fluids that have great potential in many applications. There is a need to understand the fundamental …
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Control of crystalline particle properties by spray drying
… manufacturing can offer an extensive array of particle engineering applications. Continuous manufacturing aims to deliver consistent and sustainable drug products of a better and higher quality. Spray drying is a continuous processing technique typically adopted for amorphous solid production. …
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The design, development and testing of a non-invasive continuous crystalliser system for the study of calcium oxalate crystallisation processes
… a noninvasive monitoring instrument - a Malvern Particle Size Analyser. In this technique, measurement of the steady state crystal size distribution is based on a diffraction pattern produced by the particles in a parallel beam of monochromatic light. Comparative measurements were obtained by …
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Laser-induced incandescence for soot diagnostics at high pressure
… LII is a laser-based technique for measuring particle sizes and volume fractions of nano-sized particles in aerosols. These particles, as emitted by traffic in the form of soot, cause a significant health risk, as nano-sized particles can penetrate deeply into the lungs and are considered …
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Removal of colour from solutions of azo dyes using bacterial cells (Shewanella strain J18 143)
… This observation was further proved by the particle sizing analysis. The particle cells analysis has shown the standard dye solution has 35% of particles with a size no more than 1.1 nm. The biological treated the aqueous system contained particles, up to 20%, with a size range of 500 nm to …
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SPECIATION STUDIES FOR BIOGENIC VOLATILE ORGANIC COMPOUNDS AND SECONDARY ORGANIC AEROSOL GENERATED BY OZONOLYSIS OF VOLATILE ORGANIC COMPOUND MIXTURES
… can be visualized as suspended solid or liquid particle which is in equilibrium with surrounding gases. The products of SOA formation is a mixture of semi volatile organic compounds and a fraction of the products are condensable under atmospheric conditions. The condensable portion of aerosol is …