Finite Element/Dipole Moment Method for Efficient Solution of Multiscale Electromagnetic Problems

Finite element modeling of micro particle separation using ultrasonic standing waves Süleyman, Büyükkoçak; Çetin, Barbaros; Özer, Mehmet Bülent (2014-08-07) Acoustophoresis which means separation of particles and cells using acoustic waves is becoming an intensive research subject. The method is based on inducing an ultrasonic compression standing wave inside a microchannel. A finite element approach is used to model the acoustic and electro-mechanical behavior of the piezoelectric material, the micro-channel geometry as well as the fluid inside the channel. The choices of silicon and PDMS materials are investigated as the chip materials for the resonator. A se...
Finite Element Modelling of TBC Failure Mechanisms by Using XFEM and CZM Bostanci, Safa Mesut; Gürses, Ercan; Çöker, Demirkan (Elsevier BV; 2019-01-01) Thermal Barrier Coatings have been widely used in modern turbine engines to protect the nickel based metal substrate from the high temperature service conditions, 1600-1800 K. In this study, failure mechanisms of typical Air Plasma Sprayed Thermal Barrier Coatings (TBC) used in after-burner structures composed of three major layers: Inconel 718 substrate, NiCrAlY based metallic bond coat (BC) and Yttria Stabilized Zirconia (YSZ) based ceramic top coat (TC) are investigated. Investigation of the cracking mec...
FINITE ELEMENT ERROR ANALYSIS OF A MANTLE CONVECTION MODEL John, Volker; Kaya Merdan, Songül; Novo, Julia (2018-01-01) A mantle convection model consisting of the stationary Stokes equations and a time dependent convection-diffusion equation for the temperature is studied. The Stokes problem is discretized with a conforming inf-sup stable pair of finite element spaces and the temperature equation is stabilized with the SUPG method. Finite element error estimates are derived which show the dependency of the error of the solution of one problem on the error of the solution of the other equation. The dependency of the error bo...
Finite Element Domain Decomposition Method for Rough Sea Surface Scattering ÖZGÜN, ÖZLEM; Kuzuoğlu, Mustafa (2019-12-31) Full-wave solution of electromagnetic wave scattering from rough sea surfaces is achieved by the Finite Element Domain Decomposition (FEDD) method. The method is implemented in a non-iterative manner by dividing the computational domain into overlapping subdomains, and solving the problem in each subdomain by attaching Locally-Conformal Perfectly Matched Layer (LC-PML) at the truncation boundaries. Statistical behavior of the Radar Cross Section (RCS) is investigated by Monte Carlo simulations. The results ...
Finite element modeling of scattering from objects in rectangular waveguides Gülbaş, Hüseyin; Kuzuoğlu, Mustafa; Özlem, Özgün; Department of Electrical and Electronics Engineering (2017) Numerical analysis of scattering parameters of split ring resonators which are one of the microwave circuit elements is performed by the Finite Element Method in this thesis. The fundamentals of the model and analysis method will be discussed firstly. Afterwards, the basics of Finite Element Method including weak variational form of the wave equation, 3D formulations and application to scattering parameters will be presented. The concepts of Perfectly Matched Layer and resonators will be examined in detail....

Citation Formats

O. Ozgun, R. Mittra, and M. Kuzuoğlu, “Finite Element/Dipole Moment Method for Efficient Solution of Multiscale Electromagnetic Problems,” 2010, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/54188.