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.
Results
Showing 1 to 20 of 62 for “"Mie Scattering"”.
-
Development of a Novel Planar Mie Scattering Method for Measurement of Spray Characteristics
… measurement system based on planar multi-angle Mie scattering. Sizing information consists of a mean droplet diameter and droplet distribution estimates for every individual point within a planar (2D) area of interest. The planar method makes possible the fast acquisition of data within a large …
-
Analysis of mixing and thrust diagnostics for shock tunnel hot nozzle testing
… focused-Schlieren, shearing interferometer, and Mie-scattering systems are presented. The Mie-scattering method was judged to be most applicable to measure flow mixedness for this application. However, shortcomings in the tested Mie-scattering system were identified. An improved system is …
-
An experimental investigation of organized structure and mixing in compressible turbulent free shear layers
… employed to image the large structures. Both Mie scattering from condensed ethanol droplets and laser-induced fluorescence from seeded nitric oxide were used. The LIF experiments were utilized to avoid potential particle dynamics effects associated with the Mie scattering experiments. Sizeable …
-
Molecular Characterization of Human Tissue Samples by Raman Spectroscopy with Different Laser Modes and Excitation Wavelengths
… to this study, autofluorescence and multiple Mie scattering give rise to the high background intensities in the Raman spectra. The reduction in autofluorescence is demonstrated in the comparison between 785 nm multimode (785 MM) and 830 nm multimode (830 MM) lasers. 830 MM demonstrates better …
-
Facility and Methodologies for Evaluation of Hydrogen-Air Mixer Performance
… utilizes three experimental techniques: Mie scattering flow visualization, schlieren flow visualization, and Laser Doppler Velocimetry (LDV) to characterize and evaluate mixer performance. Results from the two flow visualization experiments illustrate the effectiveness of the established …
-
Flow Visualization Study of Wake-Stabilized Diffusion Flames in a Crossflow: Effects of Crossflow Turbulence
… baseline comparisons. The experimental method of Mie scattering flow visualization is used to investigate the effects of turbulence. The addition of freestream turbulence has been found to make changes to the flame characteristics and the development of vortical structures in the separated shear …
-
Pyrolysis oil combustion characteristics and exhaust emissions in a swirl-stabilized flame
… and several laser diagnostic methods including Mie scattering, hydroxyl radical planar induced fluorescence (OH-PLIF), fuel planar laser-induced fluorescence (Fuel-PLIF), and laser induced incandescence (LII). Spray characteristics have been investigated by employing Mie scattering and phase …
-
Quasi-Elastic Light Scattering Diagnostics for a High Voltage Spark Discharge
Quasi-elastic light scattering was used as a diagnostic probe into analyte material transport processes in a unipolar, positionally stable, high voltage spark discharge. The material transport by particulate intermediates was studied. Instrumentation was constructed to allow spatially-, …
-
Optical Binding Phenomena: Observations and Mechanisms
… micro-particles are presented. A sophisticated Mie scattering model is developed, capable of performing time-evolution simulations of a multi-particle system. This is used to analyse and interpret experimental results in evanescent and Gaussian beam traps, and to develop simple, intuitive …
-
Using the method of moments and Robin Hood method to solve electromagnetic scattering problems
… a program in C++ that solves electromagnetic scattering problems for arbitrarily shaped scatterers. This was implemented by using a surface integral formulation of Maxwell's equations, which discretizes the surface of the scatterer into thousands of triangles. The method of moments (MoM) was …
-
Novel Cladding Designs for Engineering Electromagnetic Scattering
… surface impedances matrix to manipulate the scattering and absorption cross sections. Utilizing Lorenz-Mie scattering theorem, we thoroughly examine tensor-form surface impedance and the corresponding scattering properties, aiming to find the optimal cloaking strategy under different …
-
Raindrop size distribution
… relationship). Also introduce the theory of scattering by such hydrometers as rain, snow, hail and fog. There are three techniques to determine the scattering parameters are Rayleigh Scattering, Mie Scattering and T-Matrix method.
-
Experimental analysis and prospective flow diagnostic applications for fluorescence dye-doped microparticles
… Research Center and measurements of simultaneous Mie scattering and laser induced fluorescence (LIF) signals were obtained with the goal of providing a capability for velocity and scalar flow measurements. Three organic fluorescent dyes, Rhodamine B (RhB), Dichlorofluorescein (DCF), and Kiton Red …
-
Particle Image Velocimetry Applications of Fluorescent Dye-Doped Particles
… PIV techniques. For the free jet results, Mie-scattered and fluorescent PIV were compared and showed average velocities within 3% of each other at the nozzle exit. Based on the PIV validation requirements used, this was deemed to be more of an indication of nozzle unsteadiness rather than …
-
Three Dimensional Laser Diagnostics for Turbulent Flows and Flames
… TC method and validated by a simultaneous 2D Mie scattering measurement. The results showed that the flame topography obtained from TC and the Mie scattering agreed qualitatively, but quantitative difference on the order of millimeter was observed between these two methods. Such difference was …
-
Gas dynamic and acoustic interactions with supersonic free shear layers
… layer. High-speed cinematic (300,000 frames/sec) Mie-scattering and shadowgraph techniques were employed to track the evolution of these structures in the mixing layer. A covariance algorithm was developed to obtain quantitative information about the size, shape, orientation and convection speed …
-
Diffuse reflectance spectroscopy of human colon tissue
… was formulated in terms of the absorption and scattering properties of tissue. In the case of absorption, hemoglobin was identified as the major absorber of light, and scattering was modeled as a homogeneous of collection spherical microparticles using Mie scattering theory. The validity and …
-
Quantitative imaging of living cells by deep ultraviolet microscopy
… protein and nucleic acid proved difficult, and scattering artifacts were a significant concern. We have used short exposures of deep-ultraviolet light synchronized with an ultraviolet-sensitive camera to observe mitosis and motility in living cells without causing necrosis, and quantified …
-
Electromagnetic scattering and induction models for spheroidal geometries
Electromagnetic scattering from a medium containing randomly distributed discrete dielectric spheroidal inclusions is studied. Also, the broadband magnetoquasistatic solution for the induced magnetic field from a conducting and permeable spheroid under time harmonic excitation is demonstrated. …
-
Monitoring Bacteria Cultures Using Near Infrared (nir) Binary Spectronephelometry (bsn), Raman Spectra and Principal Component Analysis (pca)
… i.e., propagation of light occurs in the single scattering regime. A BSN "training set" associates a grid of elastic emission measurements, comprising Rayleigh and Mie scattering, and inelastic emission measurements, comprising fluorescence and Raman emission, with a grid of varying known …
Page 1 of 4