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 25 for “"effective medium theory"”.
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A Self-Consistent Renormalized Effective Medium Theory for the Determination of Transport Coefficents of Disordered Media
Made available in DSpace on 2017-07-06T18:59:08Z (GMT). No. of bitstreams: 3 Toreja_Allen_J_MS.pdf: 97871832 bytes, checksum: 3ea9e9aee51a43a859e330e0218b2d08 (MD5) Toreja_Allen_J_MS_ABS.pdf: 579365 bytes, checksum: b921d6259dea13dc6008d71014324bac (MD5) license.txt: 4813 bytes, checksum: …
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Wave scattering from cylindrical fluid inclusions in an elastic medium and determination of effective medium properties
… fluid-filled inclusion in an attenuating elastic medium. The scattering vs. angle results are shown for a laboratory experiment in which a single water-filled cylindrical inclusion is embedded in polypropylene. Four different radius-towavelength ratios of 1.9, 2.4, 8.8 and 11.0 were measured and …
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Investigation of resonators loaded periodic structures
… Therefore under the fundamental limit of effective medium theory that the dimensions of the lattice are much smaller than the wavelength, we can treat the array of SRRs as bulk material and retrieve its effective parameters.
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Assessment of dielectric models and their application to polymer matrix composites
… ceramic spherical inclusions. To predict the effective dielectric constant of the composite, effective medium theory based on Clausius-Mossoti equation was used. It was found that predictions for effective permittivity, based on this relation, correlate well with experimentally obtained …
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Thermal conductivity of fluids containing suspension of nanometer-sized particles
… be explained based on classical Maxwell-Garnett effective medium theory. Although ethylene glycol containing gold nanoparticles produces significantly higher enhancement in thermal conductivity over those predicted by the Maxwell-Garnett theory, Fourier transform analysis indicates that the …
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Statistical Physics of Semidilute Polymer Systems (And); Soft Billiard Systems
… of polymers in dilute solution. However, polymer theory in the semidilute regime is less sound. We first review RG results on statics, using the so-called direct method and employing the Edwards Hamiltonian. We present a careful RG account of arbitrarily polydisperse semidilute polymer solution, …
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Uniaxial optical phase change metamaterials
… optical properties are simulated on the basis of effective medium theory (EMT) and transfer matrix method (TMM). The findings in this paper demonstrate that broadband wavelength regions of high reflectance, high birefringence, and zero-crossing birefringence can be found and tuned as a function of …
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Percolation and homogenization theories for heterogeneous materials
… degree, making the simple rule-of-mixtures ineffective in most cases. This thesis studies the macroscopic effective diffusion, diffusional creep, and elastic properties of heterogeneous grain boundary networks and composite solids, both theoretically and numerically, and explores the …
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The optical properties of bismuth nanowires
… nanowires, two methods were developed. First, effective medium theory applied in reverse was used to deduce the dielectric function of materials smaller than the wavelength of light. Second, a technique to fabricate nanowires with diameters above 200nm was transfered into our laboratory.
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Development of differential scheme micromechanics modeling framework for predictions of hot-mix asphalt (HMA) complex modulus and experimental validations
… framework based on the differential scheme effective medium theory has been developed and introduced herein. To verify and validate the prediction accuracy and applicability, a series of various asphalt-aggregate mixtures starting from the homogeneous asphalt binder phase up to a very highly …
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An improved approach for quantifying the impact of geological uncertainty and modelling decisions on static and dynamic reservoir models - a case study from a giant fractured carbonate reservoir
… were included in the reservoir model, using effective medium theory. The presence of fractures specifically improved the history matching quality for wells located close to the faults; these wells were very difficult to match in the past as fractures were not considered by the operator. This …
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Mechanics, shape, and programmability in soft matter systems: From fluid membranes to spring and droplet networks
… my collaborators and I have constructed an effective medium (mean field) theory of an anisotropic, disordered spring network. We find that increasing the anisotropy increases the filament density required for a nonzero shear modulus (rigidity). We also conduct numerical simulations and find …
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Investigation into digital circuit design with GaAs/Ga2O3 heterostructure MOSFETs
… includes some necessary approximations using effective medium theory. Further adjustments, or ratio corrections, are introduced to ensure that the internal physical parameters of BSIM will be correct. The models are compared to similarly-sized silicon devices to investigate the difference in …
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Statistical physics of semidilute polymer systems soft billiard systems
… of polymers in dilute solution. However, polymer theory in the semidilute regime is less sound. We first review RG results on statics, using the so-called direct method and employing the Edwards Hamiltonian. We present a careful RG account of arbitrarily polydisperse semidilute polymer solution, …
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Generalized effective medium theories and numerical verification
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-15 without embargo terms
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Modeling of a dielectric barrier discharge (DBD) plasma reactor for soil remediation
… at macroscopic (minutes) timescales. The Effective Medium Theory is employed to provide estimates of the effective temporally-evolving and three-phasic transport properties of the soil sample. Model predictions considering the temporal evolution of the plasma remediation process are …
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Prediction Of Optical Properties Of Plasmonic Composites: Applications To Solar Energy Harvesting
… Fair agreement was found between simulation and effective medium theories for binary and ternary composites. Responses of ternary Ag/Cu/SiO2 composites with various Ag:Cu ratios were found to be in fair agreement with the experimental data obtained from literature. Experiments with photosynthetic …
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Azimuthal P-wave AVA Inversion for Fracture Orientation and Density
… seismic modeling of a simulated fractured medium to analyze variations of seismic reflection amplitudes with incident and azimuthal angles (AVAZ). The intent is to extract the information about the fracture orientation and intensity of a fractured medium. The effective compliance tensor for …
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Critical evaluation of anomalous thermal conductivity and convective heat transfer enhancement in nanofluids
… and aspect ratio, as expected from classical theory. The effective medium theory developed for dispersed particles by Maxwell in 1881, and recently generalized by Nan et al., was found to be in good agreement with the experimental data. The nanofluid literature contains many claims of …
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Heat Transport across Dissimilar Materials
… between the Ni particles and the YSZ matrix. An effective medium theory is used to estimate the lower limits for the interface thermal conductance between the nickel nanoparticles and the YSZ matrix (G>170 MW m-2 K-1), and the nickel nanoparticle thermal conductivity.
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