An explicit finite-difference analysis of the variable property turbulent forced convection in pipes using various turbulent transport models.

1982
Tunaoğlu, Serdar Nuri

Suggestions

An analysis of a linearly extrapolated BDF2 subgrid artificial viscosity method for incompressible flows
Demir, Medine (Elsevier BV, 2020-10-01)
This report extends the mathematical support of a subgrid artificial viscosity (SAV) method to simulate the incompressible Navier-Stokes equations to better performing a linearly extrapolated BDF2 (BDF2LE) time discretization. The method considers the viscous term as a combination of the vorticity and the grad-div stabilization term. SAV method introduces global stabilization by adding a term, then anti-diffuses through the extra mixed variables. We present a detailed analysis of conservation laws, includin...
An analysis of stochastic disturbances on nonlinear missile-target engagements based on the adjoint method
Sezer, Emrah; Nalcı, Mehmet Ozan; Kutay, Ali Türker (2016-01-01)
© 2016, American Institute of Aeronautics and Astronautics Inc. All rights reserved.A stochastic adjoint analysis tool that can capture the dominant nonlinearities of a typical missile-target engagement scenario, in addition to the dominant dynamics and stochastic error sources of a missile is developed. The two dimensional, nonlinear missile target terminal engagement problem is modeled in state dependent coefficient form, to generate a set of truth data. Dominant missile dynamics regarding the miss distan...
An Analysis for the Broad-Band Absorption Enhancement Using Plasmonic Structures on Uncooled Infrared Detector Pixels
Lulec, Sevil Z.; Küçük, Serhat; Battal, Enes; Okyay, Ali K.; Tanrikulu, M. Yusuf; Akın, Tayfun (2012-04-27)
This paper introduces an analysis on the absorption enhancement in uncooled infrared pixels using resonant plasmon modes in metal structures, and it reports, for the first time in literature, broad-band absorption enhancement using integrated plasmonic structures in microbolometers for unpolarized long-wave IR detection. Different plasmonic structures are designed and simulated on a stack of layers, namely gold, polyimide, and silicon nitride in order to enhance absorption at the long-wave infrared. The sim...
An Investigation of seismic face stability of deep tunnels by using an axisymmetric finite element model
Hadley, Hannah Elizabeth; Sucuoğlu, Haluk; Yılmaz, Mustafa Tolga; Department of Civil Engineering (2018)
The static stability of tunnel faces has been widely studied, with the development of limit analysis and numerical modelling solutions. There has been limited research into seismic tunnel face stability. The aim of this study is to find the effect of seismic loading on tunnel face stability and suggest factors that could be used in design. A numerical model using the axisymmetric finite element method is developed to assess tunnel face stability under seismic loading. To verify the numerical analysis, it wa...
An empirical relationship based on high-pass filtering to estimate usable period range for nonlinear SDOF response
Kale, Özkan; Akkar, Sinan; Department of Civil Engineering (2009)
High-pass filtering that is one of the most efficient methods in removing long-period noise of accelerograms is investigated for its effect on nonlinear oscillator deformation response. Within this context, uncertainty in filter cut-off periods that would significantly modify the low-frequency content of accelerograms come into prominence for obtaining reliable long-period displacement response. Analog and digital ground-motion records from recently compiled Turkish strong-motion database are used and these...
Citation Formats
S. N. Tunaoğlu, “An explicit finite-difference analysis of the variable property turbulent forced convection in pipes using various turbulent transport models.,” Middle East Technical University, 1982.