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Electromagnetic model subdivision and iterative solvers for surface and volume double higher order numerical methods and applications

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dc.contributor.authorManić, Sanja B., author
dc.contributor.authorNotaroš, Branislav, advisor
dc.contributor.authorReising, Steven, committee member
dc.contributor.authorChandrasekar, V., committee member
dc.contributor.authorOprea, Iuliana, committee member
dc.contributor.authorIlić, Milan, committee member
dc.date.accessioned2020-01-13T16:41:56Z
dc.date.available2021-01-07T16:41:53Z
dc.date.issued2019
dc.description.abstractHigher order methods have been established in the numerical analysis of electromagnetic structures decreasing the number of unknowns compared to the low order discretization. In order to decrease memory requirements even further, model subdivision in the computational analysis of electrically large structures has been used. The technique is based on clustering elements and solving/approximating subsystems separately, and it is often implemented in conjunction with iterative solvers. This thesis addresses unique theoretical and implementation details specific to model subdivision of the structures discretized by the Double Higher Order (DHO) elements analyzed by i) Finite Element Method - Mode Matching (FEM-MM) technique for closed-region (waveguide) structures and ii) Surface Integral Equation Method of Moments (SIE-MoM) in combination with (Multi-Level) Fast Multipole Method for open-region bodies. Besides standard application in decreasing the model size, DHO FEM-MM is applied to modeling communication system in tunnels by means of Standard Impedance Boundary Condition (SIBC), and excellent agreement is achieved with measurements performed in Massif Central tunnel. To increase accuracy of the SIE-MoM computation, novel method for numerical evaluation of the 2-D surface integrals in MoM matrix entries has been improved to achieve better accuracy than traditional method. To demonstrate its efficiency and practicality, SIE-MoM technique is applied to analysis of the rain event containing significant percentage of the oscillating drops recorded by 2D video disdrometer. An excellent agreement with previously-obtained radar measurements has been established providing the benefits of accurately modeling precipitation particles.
dc.format.mediumborn digital
dc.format.mediumdoctoral dissertations
dc.identifierManic_colostate_0053A_15791.pdf
dc.identifier.urihttps://hdl.handle.net/10217/199816
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado State University. Libraries
dc.relation.ispartof2000-2019
dc.rightsCopyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.
dc.subjectiterative solvers
dc.subjectsurface integral equation method of moments
dc.subjectweather modeling
dc.subjectnumerical methods
dc.subjectfinite element method
dc.subjecttunnel modeling
dc.titleElectromagnetic model subdivision and iterative solvers for surface and volume double higher order numerical methods and applications
dc.typeText
dcterms.embargo.expires2021-01-07
dcterms.embargo.terms2021-01-07
dcterms.rights.dplaThis Item is protected by copyright and/or related rights (https://rightsstatements.org/vocab/InC/1.0/). You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).
thesis.degree.disciplineElectrical and Computer Engineering
thesis.degree.grantorColorado State University
thesis.degree.levelDoctoral
thesis.degree.nameDoctor of Philosophy (Ph.D.)

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