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Browsing Matematik Bölümü by Title

Browsing Matematik Bölümü by Title

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  • Effects of partial magnetic field in a vented square cavity with aiding and opposing of MWCNT-water nanofluid flows 
    Geridönmez, B. Pekmen; Öztop, Hakan F. (ELSEVIER SCI LTDTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND, 2021-12-01)
    A numerical investigation for examining the effect of a uniform partial magnetic field on fluid flow and heat transfer of Multi Walled Carbon Nano Tube (MWCNT)-water nanofluid is done in a vented square cavity considering ...
  • Existence of unpredictable solutions and chaos 
    Akhmet, Marat; Fen, Mehmet Onur (SCIENTIFIC TECHNICAL RESEARCH COUNCIL TURKEY-TUBITAK, ATATURK BULVARI NO 221, KAVAKLIDERE, TR-06100 ANKARA, TURKEY, 2017)
    Recently we introduced the concept of Poincare chaos. In the present paper, by means of the Bebutov dynamical system, an unpredictable solution is considered as a generator of the chaos in a quasilinear system. The results ...
  • Extension of Sea Surface Temperature Unpredictability 
    Akhmet, Marat; Fen, Mehmet Onur; Alejaily, Ejaily Milad (SPRINGER HEIDELBERG, TIERGARTENSTRASSE 17, D-69121 HEIDELBERG, GERMANY, 2019)
    The sea surface temperature (SST) variability is clearly affected by global climate patterns, which involve large-scale ocean-atmosphere fluctuations similar to the El Nino-Southern Oscillation (ENSO). We give mathematical ...
  • Grigorchuk-Gupta-Sidki groups as a source for Beauville surfaces 
    Gül, Şükran; Uria-Albizuri, Jone (EUROPEAN MATHEMATICAL SOC, PUBLISHING HOUSE, E T H-ZENTRUM SEW A27, SCHEUCHZERSTRASSE 70, CH-8092 ZURICH, SWITZERLAND, 2020)
    If G is a Grigorchuk-Gupta-Sidki group defined over a p-adic tree, where p is an odd prime, we study the existence of Beauville surfaces associated to the quotients of G by its level stabilizers st(G)((n)). We prove that ...
  • Homoclinic and Heteroclinic Motions in Hybrid Systems with Impacts 
    Fen, Mehmet Onur; Fen, Fatma Tokmak (WALTER DE GRUYTER GMBH, GENTHINER STRASSE 13, D-10785 BERLIN, GERMANY, 2017)
    In this paper, we present a method to generate homoclinic and heteroclinic motions in impulsive systems. We rigorously prove the presence of such motions in the case that the systems are under the influence of a discrete ...
  • Homoclinical Structure of Retarded SICNNs with Rectangular Input Currents 
    Fen, Mehmet Onur; Fen, Fatma Tokmak (SPRINGER, VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS, 2019)
    The dynamics of retarded shunting inhibitory cellular neural networks (SICNNs) with rectangular input currents is investigated from the asymptotic point of view. It is rigorously proved that such networks possess homoclinic ...
  • Impact of fins and inclined magnetic field in double lid-driven cavity with Cu–water nanofluid 
    Geridönmez, B. Pekmen; Jamal, Muhammad; Hussain, Shafqat (ELSEVIER, 2021-03)
    This study deals the influence of fins and inclined magnetic field with nanofluid in single lid-driven and double lid-driven cavities. The effect of fins length and distance between them is also given attention. A two ...
  • Impact of power law fluid and magnetic field on double diffusive mixed convection in staggered porous cavity considering Dufour and Soret effects 
    Geridönmez, B. Pekmen; Jamal, Muhammad; Hussain, Shafqat (PERGAMON-ELSEVIER SCIENCE LTDTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND, 2021-02)
    This study deals the influence of power law fluid and inclined magnetic field on a porous medium in staggered cavity. The effect of Soret and Dufour parameters are also given attention. A two dimensional system of partial ...
  • Liftable homeomorphisms of cyclic and rank two finite abelian branched covers over the real projective plane 
    Medetoğulları, Elif; Atalan, Ferihe; Ozan, Yıldıray (ELSEVIERRADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS, 2021-02-01)
    In this note, we investigate the property for regular branched finite abelian covers of the real projective plane, where each homeomorphism of the base (preserving the branch locus) lifts to a homeomorphism of the covering ...
  • Liftable homeomorphisms of rank two finite abelian branched covers 
    Medetoğulları, Elif; Atalan, Ferihe; Ozan, Yıldıray (SPRINGER BASEL AG, PICASSOPLATZ 4, BASEL, 4052, SWITZERLAND, 2020-11)
    We investigate branched regular finite abelian A-covers of the 2-sphere, where every homeomorphism of the base (preserving the branch locus) lifts to a homeomorphism of the covering surface. In this study, we prove that ...
  • Magnetic source effect on EG-CuO nanofluid in a semi-annulus using RBFs 
    Geridonmez, Bengisen Pekmen (TAYLOR & FRANCIS INC, 530 WALNUT STREET, STE 850, PHILADELPHIA, PA 19106 USA, 2019)
    In this study, numerical simulation of hydrothermal behaviour of ethylene glycol based CuO nanofluid in a semi-annulus with a magnetic source is investigated. The non-dimensional governing equations are discretized by ...
  • Mapping Fatou-Julia Iterations 
    Akhmet, Marat; Fen, Mehmet Onur; Alejaily, Ejaily Milad (ASSOC COMPUTING MACHINERY, 1515 BROADWAY, NEW YORK, NY 10036-9998 USA, 2018)
    A new method of fractals construction based on Fatou-Julia iteration is proposed. We develop a non-ordinary way to map fractal into a new fractal, where the mapping function is involved in the dynamics of the generated ...
  • MHD natural convection in a cavity in the presence of cross partial magnetic fields and Al2O3-water nanofluid 
    Geridönmez, B. Pekmen; Öztop, H. F. (PERGAMON-ELSEVIER SCIENCE LTD, 2020-12-15)
    In this study, a numerical investigation on nanofluid flow and heat transfer is presented in a cavity under the effects of cross partial magnetic fields and a partial heater. The governing stream function-vorticity equations ...
  • Mixed Convection Heat Transfer in a Lid-Driven Cavity under the Effect of a Partial Magnetic Field 
    Geridonmez, Bengisen Pekmen; Öztop, Hakan F. (TAYLOR & FRANCIS INC, 530 WALNUT STREET, STE 850, PHILADELPHIA, PA 19106 USA, 2020-07)
    Mixed convection flow in a lid-driven cavity in the presence of a uniform partial magnetic field is investigated utilizing the pseudo spectral method based on polyharmonic spline radial basis functions. The two-dimensional ...
  • Natural convection in a cavity filled with porous medium under the effect of a partial magnetic field 
    Pekmen Geridönmez, Bengisen; Öztop, Hakan Fehmi (Elsevier Ltd, 2019)
    Natural convection flow in presence of partially applied magnetic field in a porous medium is investigated in this study. Partial magnetic field is applied horizontally in the direction of positive x-axis, and vertical ...
  • Natural convection in a cavity under partial magnetic field applied from different corners 
    Geridönmez, B. Pekmen; Öztop, Hakan F. (PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND, 2020-05)
    In this study, natural convection in a differentially heated square cavity is investigated under the influence of a partial uniform magnetic field applied from either the left bottom corner of the heated wall or the right ...
  • Natural convection in an open ended nanofluid filled cavity with fins in the presence of partial magnetic field and thermal radiation 
    Geridönmez, Bengisen Pekmen; Öztop, Hakan F. (WILEY111 RIVER ST, HOBOKEN 07030-5774, NJ, 2021-05-30)
    In this paper, the effect of uniform partial magnetic field is studied on natural convection flow in an open ended square cavity considering thermal radiation and the presence of two fins as well as a uniform partial ...
  • A New Regression-Based approach to estimate the shape parameter of MQ-RBFs in a free convection problem 
    Geridonmez, Bengisen Pekmen (ASME, TWO PARK AVE, NEW YORK, NY 10016-5990 USA, 2020-02)
    In this study, a novel procedure is proposed to determine the shape parameter of multiquadric (MQ) radial basis function (RBF) utilizing multivariate adaptive regression splines (Mars) in a free convection problem. Input ...
  • Numerical Investigation of Ferrofluid Convection with Kelvin Forces and Non-Darcy Effects 
    Geridönmez, Bengisen Pekmen (AMER INST MATHEMATICAL SCIENCES-AIMS, PO BOX 2604, SPRINGFIELD, MO 65801-2604 USA, 2018)
    In this study, natural convection in a porous, ferrofluid-filled cavity is numerically investigated utilizing the multiquadric (MQ) radial basis function (RBF) based pseudo spectral (PS) method. The influence of Kelvin ...

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