Fen Bilimleri Enstitüsü: Recent submissions

  • Nonlinear preconditioning applied to internal flows 
    Yıldız, Ersin. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2018., 2018.)
    Solution of large and sparse nonlinear system is required in many computational science and engineering areas. Well-known inexact Newton method converges fast with a good initial guess, however such an initial guess is ...
  • Forced convection flow and heat transfer of non-newtonian nanofluids through a circular tube 
    Kıyak, Gökhan. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2018., 2018.)
    Non-Newtonian nanofluids due to either non-Newtonian base fluid or high nano particle concentration flow cases have been numerically investigated through a circular tube under laminar flow condition. Governing equations have ...
  • Wavelet analysis in computational fluid dynamics 
    Kahraman, Ali Berk. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2018., 2018.)
    Wavelets are compact functions in space and time which enable easy data com pression through multi-resolution analysis. The compression is done by scattering dif ferent resolution levels of wavelets onto the domain, and ...
  • Visual product recognition from retail scenes 
    Aydın, Alper. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2017., 2017.)
    In this thesis project, we explore the problem of recognizing the products in retail scenes. We proposed a method where we localize the products by detecting their separating boundaries and recognize the product images ...
  • Grain size dependence of twin-dominant deformation in rolled magnesium AZ31 investigated by in situ microscopic image correlation 
    Uçar, Sevinç. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2017., 2017.)
    In this study, twin-dominant deformation in rolled Magnesium AZ31 is explored with multi-scale in situ digital image correlation (DIC) by parametrizing grain size. Two samples extracted along the rolling direction are used ...
  • Numerical prediction of forced convection and pressure drop characteristics for turbulent flow of Al2O3/water nanofluid in a circular pipe 
    Filiz, Deniz. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2017., 2017.)
    Fully developed turbulent forced convection ow of an Al2O3/water nano uid in a circular pipe under constant wall heat ux is investigated numerically, using nite volume method. Both single phase model and two phase models ...
  • Characterization of nanoparticle aggreates using inverse formulation and discrete-dipole approximation 
    Eriçok, Ozan Burak. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2017., 2017.)
    Characterization of nanostructures using numerical light scattering experiments without using polarization information and a priori particle size or number measure ments is investigated. Optimization and statistical methods ...
  • Evaluation of crack tip singular fields in shape memory alloys 
    Özerim, Gülcan. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2017., 2017.)
    In this thesis crack tip singular fields of an edge cracked shape memory alloy (SMA) plate under plane stress & Mode I are studied using similarities between loading paths of a pseudoelastic SMA and a strain hardening ...
  • Application of electrical potential method to compact tension specimen 
    Gençer, Ferruh. (Thesis (M.S.)- Bogazici University. Institute for Graduate Studies in Science and Engineering, 1981., 1981.)
    In this thesis "Electrical Potential Hethod" is considered. It is an experimental method to monitor sub-critical crack growth. Optimum locations for current and voltage leads and the calibration curve for compact tension ...
  • Explicit methods in quasi - static analysis of rubber - like materials 
    Yurdaba, Volkan. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2017., 2017.)
    Static finite element analysis based on implicit time integration may have con vergence difficulties in presence of complex loading conditions, incompressibility and nonlinear material properties. In such cases, quasi-static ...
  • Design of an adaptive backstepping controller for active suspension systems 
    Kararsız, Gökhan. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2017., 2017.)
    This thesis presents a method to design an adaptive controller for active suspen sion systems which cancel the effect of the unknown road disturbance in presence of parametric uncertainty. In this thesis, three different ...
  • Alternative closure of the Yvon - Bron - Green hierachy 
    Pakzad, Sina Zare. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2017., 2017.)
    Lacking an efficient operation on the correct time scales has caused atomistic level simulation methods to encounter some limitations as they can not study phe nomenas like phase transition. One of the obstacles in achieving ...
  • Carbon nanoparticles based polypropylene nanocomposites 
    Bina, Farzad Abdollahzadeh. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2017., 2017.)
    Although polymers have some advantages like easy processability, good chemical resistance, low cost, and low specific gravity as compared to metals and ceramic, they have disadvantages such as low strength, low modulus, ...
  • Experimental investigation of heat transfer enhancement of nanofluids in computer cooling sysyems 
    Atik, Özgür. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2017., 2017.)
    In this study, cooling performance enhancement of computer liquid cooling systems using hBN-water nanofluids are investigated experimentally. Water based nanofluids are prepared with two step method by using ultrasonication ...
  • Providing active haptic feedback in two dimensions on a touch screen 
    Alma, Uğur Alican. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2017., 2017.)
    In this thesis, a two dimensional active electrostatic tactile display, which is capable of applying directional forces in two dimensions to a stationary nger, is analyzed. Directional forces are created using friction ...
  • Numerical analysis for magnetic effects on newtonian and non-newtonian ferrofuid flow around a circular cylinder 
    Adıgüzel, Ömer Barış. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2017., 2017.)
    In this study, the e ects of magnetic eld applications are investigated on ferromagnetic ow around cylinder. The analyses are made for Newtonian and non- Newtonian ow types. In order to investigate the non-Newtonian ...
  • Numerical modelling and optimization of solar nanofluids 
    Akyüz, Can Onur. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2017., 2017.)
    Direct Absorption Solar Collectors (DASCs) have gained popularity as a new and promising design for solar collector systems. DASCs utilize nano uids to absorb solar energy directly; eliminating the need for an absorber ...
  • 3D radial inflow turbine design and analysis for a small scale ORC application 
    Sezerkan, Emre. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2017., 2017.)
    In this study, the aim is to design and analyze a single stage subsonic radial in- ow turbine for the Organic Rankine Cycle system established in Bogazici University Renewable Energy Technologies Laboratory, by using ...
  • Analysis and optimization of a small scale solar organic rankine cycle system for power generation 
    Soysal, Umut. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2017., 2017.)
    In this study, a numerical model of a small scale concentrated solar power system is designed for Istanbul conditions and the annual performance of the system is evaluated. As a collector system, a thermal model of parabolic ...
  • Design of a two-degree-of-freedom gripper for parallel manipulators 
    Atakuru, Taylan. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2017., 2017.)
    Parallel manipulators are closed-loop mechanisms presenting superior performance compared to serial manipulators in terms of speed, accuracy, precision, and rigidity. They have become widely popular in the industry in the ...

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