Önder Türk

E-mail

oturk@metu.edu.tr

Department

Graduate School of Applied Mathematics

ORCID

0000-0002-9609-1888

Scopus Author ID

55766003600

Web of Science Researcher ID

AAG-4980-2019

An analysis of Nitsche's prescription of Dirichlet conditions for the conforming finite element approximation of Maxwell's problem Boffi, Daniele; Codina, Ramon; Türk, Önder (2026-05-20) In this paper we consider the conforming finite element (FE) approximation of Maxwell's problem and analyse the prescription of essential boundary conditions in a weak sense using Nitsche's method. To avoid indefiniteness ...
hp Analysis of Nitsche’s method for Maxwell’s problem using a stabilised finite element formulation Boffi, Daniele; Codina, Ramon; Türk, Önder (2026-01-01) The paper presents an hp analysis of Nitsche’s method applied to Maxwell’s problem using a stabilised finite element (FE) formulation. While the FE formulation and the weak imposition of Dirichlet boundary conditions have ...
Weak Enforcement of Boundary Conditions for Maxwell’s Problem Using the Linked Lagrange Multiplier Method Codina, Ramon; Türk, Önder (2025-01-01) In this study, we propose a finite element approximation of Maxwell’s problem with the prescription of essential boundary conditions in a weak way that is based on a linked Lagrange multiplier approach. We consider an augm...
Modal analysis in mixed finite element methods Türk, Önder (2024-09-09)
Least-squares finite element formulations of Steklov eigenvalue problems Bertrand, Fleurianne; Türk, Önder (2024-06-14)
Approximation of a Laplace-Steklov eigenvalue problem by finite and boundary element methods Türk, Önder (2024-01-11)
Time dependent magnetic field effects on the MHD flow and heat transfer in a rectangular duct Tezer, Münevver; Türk, Önder (2024-01-01) We consider the effect of time dependent magnetic field on the natural convection magnetohydrodynamic flow in a rectangular duct. The flow is two-dimensional, unsteady, laminar and the fluid is electrically conducting and ...
Finite Element Formulations for Maxwell's Eigenvalue Problem Using Continuous Lagrangian Interpolations Boffi, Daniele; Codina, Ramon; Türk, Önder (2024-01-01) We consider nodal-based Lagrangian interpolations for the finite element approximation of the Maxwell eigenvalue problem. The first approach introduced is a standard Galerkin method on Powell-Sabin meshes, which has recent...
Direct and inverse problems for a 2D heat equation with a Dirichlet–Neumann–Wentzell boundary condition Ismailov, Mansur I.; Türk, Önder (2023-12-01) In this paper we present the inverse problem of determining a time dependent heat source in a two-dimensional heat equation accompanied with Dirichlet–Neumann–Wentzell boundary conditions. The model is of significant pract...
Analytical and numerical assessments of boundary variations in Steklov eigenvalue problems Bahadır, Eylem; Türk, Önder (2023-04-01) In this study, we aim to analyze the effects of several boundary variations on the spectrum of the simplified and generalized Steklov eigenvalue problems (EVPs) in which the spectral parameter resides on the boundary. We m...

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