Analysis of Hypersonic Nozzles with Newton and Preconditioned Newton-GMRES Methods

Analysis of double-negative materials with surface integral equations and the multilevel fast multipole algorithm Ergül, Özgür Salih (2011-08-13) We present a fast and accurate analysis of double-negative materials (DNMs) with surface integral equations and the multilevel fast multipole algorithm (MLFMA). DNMs are commonly used as simplified models of metamaterials at resonance frequencies and are suitable to be formulated with surface integral equations. However, realistic metamaterials and their models are usually very large with respect to wavelength and their accurate solutions require fast algorithms, such as MLFMA. We consider iterative solutio...
Analysis of hypersonic flow using three dimensional navier-stokes equations Özgün, Muharrem; Eyi, Sinan; Department of Aerospace Engineering (2016) Metallic materials in aerospace structures are exposed to impact type loads depending on their usage area. High strain rate material characterization of metallic materials is very crucial to properly prepare finite element models to be used in impact loading situations. Johnson-Cook material model is a suitable material model to represent the behaviour of metallic materials at high strain rates. In the present thesis study, parameters of the Johnson-Cook material model for Al 7075-T651 are determined utiliz...
Analysis of hypersonic flow using three dimensional Navier-Stokes equations Özgün, Muharrem; Eyi, Sinan (2014-01-01) © 2014 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.The purpose of this study is to develop an accurate and efficient CFD code that can be used in hypersonic flows. The flow analysis is based on the three dimensional Navier-Stokes equations. These equations are solved by using Newton’s method. The analytical method is used to calculate the Jacobian matrix. Flow parameters and convective heat transfer are analyzed on Apollo AS-202 Command Module. Especially, temperature...
Analysis of composite nanoparticles with surface integral equations and the multilevel fast multipole algorithm Ergül, Özgür Salih (IOP Publishing, 2012-06-01) Composite nanoparticles involving multiple parts with different material properties are analyzed rigorously with surface integral equations and the multilevel fast multipole algorithm. Accuracy and efficiency of the developed parallel implementation are demonstrated on spherical objects with dielectric, perfectly conducting, plasmonic, and double-negative regions. Significant effects of the formulation on numerical solutions are also considered to show the tradeoff between the efficiency and accuracy.
Analysis of cathodic protection systems using wave propagation techniques Gürsoy, Berk; Özay, Nevzat; Department of Electrical and Electronics Engineering (1998)

Citation Formats

E. Muslubaş and S. Eyi, “Analysis of Hypersonic Nozzles with Newton and Preconditioned Newton-GMRES Methods,” 2015, vol. 2015, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/45041.