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 20 of 188 for “"vaporization"”.
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Tungsten Coil Electrothermal Vaporization for Atomic Spectroscopy
Electrothermal vaporization has served as an alternative sample introduction method in atomic spectroscopy for some time. Typically, electrothermal vaporizers made of graphite, but these devices do not lend well to mass production, are expensive, and require large power supplies for operation. In …
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On the heat of vaporization of ammonia
Thesis: B.S., Massachusetts Institute of Technology, Department of Chemical Engineering, 1891
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Ash vaporization under simulated pulverized coal combustion conditions
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1982.
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Modeling of Multicomponent Fuel Vaporization in Internal Combustion Engines
Finally, a preliminary study on modeling micro-explosions and flash boiling was performed. These two phenomena were modeled using a bubble-droplet system. A description was formulated to predict bubble growth and was verified using experiment data. Both the breakup due to aerodynamical force and …
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Thermal Analysis of a Vaporization Source for Inorganic Coatings
A thermal analysis of a conventional vaporization source by finite difference methods, including experimental validation, is presented. Such a system is common to industries whose chief concern is the precipitation of inorganic coatings. Both the physical and the model systems are comprised of a …
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FLAME PHOTOMETRY OF PHOSPHORUS AND SULFUR BY GRAPHITE ATOMIZER VAPORIZATION
<p>Because phosphorus is a common pollutant in natural waters, there is a need to develop a convienent, reliable technique to measure low phosphorus concentrations. Spectrophotometric procedures involving the molybdenum blue complex have so far proven to be the best technique for measuring …
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Laser produced vaporization of materials for use in mass spectroscopic analysis
… to produce rapid surface heating and consequent vaporization in absorbing materials. For ordinary lasers it appears that the heating process can be adequately explained on the basis of a relatively simple classical thermodynamic treatment; however, for Q-switched lasers it is much more …
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Synthetic vascular materials via a vaporization of sacrificial component (VaSC) approach
… that overcome these limitations. Namely, the vaporization of sacrificial component (VaSC). The chosen sacrificial material, poly(lactic acid) (PLA), can be easily incorporated into composites and undergoes a solid-to-gas transition at ca. 280 oC, which allows for the extraction of the gaseous …
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Investigation of Histotripsy Cavitation and Acoustic Droplet Vaporization From Perfluorocarbon Nanoparticles
… stable bubble formation from acoustic droplet vaporization (ADV) for nancone clusters. The culmination of this thesis will advance our understanding of the behavior of acoustically-active nanoparticles when exposed to varied pulsing schemes and frequencies. This knowledge will allow for the …
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Modeling of Multi-Component Fuel Vaporization for Spray Simulations Using Continuous Thermodynamics
A preliminary study on drop-bubble dynamics and instability with Marangoni effects is also given. This issue is motivated by its potential application for improving air-fuel mixing and understanding the possible drop-bubble breakup mechanism.
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Heat transfer and mixture vaporization in intake systems of spark ignition engines
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1997.
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Novel preparation of endohedral metallofullerenes via laser vaporization of fullerene/metal pellets
Electric-arc vaporization of graphite rod/metal (or metal oxide) mixtures in an inert He atmosphere has been the method of choice for the production of endohedral metallofullerenes (Am@C2n). However, yields of endohedral metallofullerenes have been limited to only a few percent of the total …
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A theoretical analysis of combined melting and vaporization using the boundary element method
Melting and vaporization of solids occur very often in nature and in man-made processes. Many analytical and numerical solutions exist for solving the temperature field in the liquid and solid regions, but inaccuracies persist in tracking the phase change interfaces and the numerical solution of …
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Detection of Illicit Drugs in Various Matrices Via Total Vaporization Solid-Phase Microextraction
… is adsorbed onto the fiber coating. Total Vaporization Solid-Phase Microextraction (TV-SPME) is a technique that is derived from this technique. In TV-SPME, liquid samples are completely vaporized allowing for better adsorption and fewer matrix effects. This method does not require any …
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Modeling of biofuel-diesel multi-component fuel effects on vaporization, micro-explosion and combustion
… which is characterized by incomplete fuel vaporization and spray impingement on cylinder walls. Residual fuel in the cylinder causes high levels of unburned hydrocarbons and carbon monoxide emissions while altering engine fuel-oil dilution. Thus, fuel atomization that produces fine droplets …
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The evolution of fuel nitrogen during the vaporization of heavy fuel oil droplet arrays
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1982.
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