Browsing by Author "Akçay, Selma"
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Düşey düz bir levhanın periyodik salınımlarının ısı transferine etkisi
Akçay, Selma; Akdağ, Ünal (Gazi Üniversitesi, 2020)Bu çalışmada, düşey düz bir levhanın periyodik salınımlarının ısı transferi üzerindeki etkisi deneysel ve sayısal olarak incelenmiştir. Deney sistemi, içinde deneysel modelin hareket ettiği şeffaf bir muhafazayı, modelin ... -
Düşey periyodik salınıma sahip bir levhadan taşınımla ısı transferinin incelenmesi
Akçay, Selma (Aksaray Üniversitesi Fen Bilimleri Enstitüsü, 2020)Bu çalışmada, düşey düz bir levhanın periyodik salınımlarının karışık taşınım ile ısı transferi üzerindeki etkileri deneysel ve sayısal olarak incelenmiştir. Deneysel düzenek, şeffaf bir muhafaza, bu muhafaza içinde hareket ... -
Düz bir yüzeye çarpan pulsatif jetin ısı transferi karakteristiğinin deneysel incelenmesi
Akdağ, Ünal; Akçay, Selma; Karabayır, Mustafa Levent (Gazi Üniversitesi, 2023)In this research, cooling of the target surface consisting of a flat plate with constant heat flux using a pulsating impinging jet is investigated experimentally. In the investigations, the jet Reynolds number (Rej), Prandtl ... -
Effect on heat transfer of periodic oscillations of a vertical flat plate
Akçay, Selma; Akdağ, Ünal (Gazi Üniversitesi, 2020)Bu çalışmada, düşey düz bir levhanın periyodik salınımlarının ısı transferi üzerindeki etkisi deneysel ve sayısal olarak incelenmiştir. Deney sistemi, içinde deneysel modelin hareket ettiği şeffaf bir muhafazayı, modelin ... -
Eliptik boru demeti üzerinden geçen nanoakışkanların laminer akışının ısı transferine etkisi
Akdağ, Ünal; Akçay, Selma (TMMOB Makina Mühendisleri Odası, 2022)Bu çalışmada, sabit duvar sıcaklığına sahip eliptik boru demeti üzerinden geçen CuOsu nanoakışkanın laminer akışının ısı transferine ve sürtünme faktörüne etkileri sayısal olarak incelenmiştir. Çalışmada, farklı kesit ... -
Experimental investigation of heat transfer with a transversely pulsating jet on a flat plate
Akdağ, Ünal; Akçay, Selma; Demiral, Doğan; Palancıoğlu, Hakan (TIBTD, 2018)In this study, the effect of a transversely pulsating jet on heat transfer over a flat plate is investigated experimentally. The experimental study consists of a heater and a pulsating jet. The heater is ... -
Experimental investigation of mixed convection on an oscillating vertical flat plate
Akçay, Selma; Akdağ, Ünal; Palancıoğlu, Hakan (Elsevier Ltd, 2020)This study experimentally investigates the mixed-convection heat transfer on a moving vertical flat plate. The setup comprises a hanger–pulley system above a transparent volume in which the experimental model moves; a ... -
Experimental investigation of the heat transfer characteristics of a pulsating impinging jet on a flat surface
Akdağ, Ünal; Akçay, Selma; Karabayır, M. Levent (Gazi Üniversitesi, 2023)In this research, cooling of the target surface consisting of a flat plate with constant heat flux using a pulsating impinging jet is investigated experimentally. In the investigations, the jet Reynolds number (Rej), Prandtl ... -
Experimental investigation of the heat transfer characteristics of a synthetic annular jet impingement on a flat surface
Akdağ, Ünal; Akçay, Selma; Ün, Necati; Danışmaz, Merdin (Taylor and Francis Ltd., 2024)Annular impinging jets create a more uniform flow on the impact surface compared to circular impinging jets, allowing the surface to cool better. Additionally, periodic flow oscillations significantly increase heat transfer ... -
Heat transfer enhancement iheat transfer enhancement in a channel with inclined baffles under pulsating flow: a cfd studyn a channel with inclıned baffles under pulsating flow: a cfd study
Akçay, Selma; Akdağ, Ünal (Begell House Inc., 2023)This study numerically investigated hydraulic and thermal performance in a channel with inclined baffles under pulsating flow conditions. The baffles were placed in a staggered arrangement. The governing equations were ... -
Heat transfer enhancement with laminar pulsating nanofluid flow in a wavy channel
Akdağ, Ünal; Akçay, Selma; Demiral, Doğan (Pergamon-Elsevier Science Ltd, 2014)In this study, the heat transfer characteristics of Al2O3-water based nanofluids in a wavy mini-channel under pulsating inlet flow conditions are investigated numerically. The simulations are performed for nanofluid volume ... -
Heat transfer enhancement with nanofluids under laminar pulsating flow in a trapezoidal-corrugated channel
Akdağ, Ünal; Akçay, Selma; Demiral, Doğan (Inderscience Enterprises Ltd., 2017)In this study, the heat transfer characteristics of CuO-water-based nanofluids in a trapezoidal-corrugated channel under pulsating inlet flow conditions are investigated numerically. The simulations are performed for ... -
Heat transfer in a triangular wavy channel with cuo-water nanofluids under pulsating flow
Akdağ, Ünal; Akçay, Selma; Demiral, Doğan (Vinca Inst Nuclear Sci, 2020)In this paper; heat transfer and pressure drop characteristics of CuO-water nano-fluid flow in a isothermally heated triangular-wavy channel under pulsating inlet conditions are numerically investigated. A numerical ... -
Investigation of heat transfer performance using an oscillating vertical flat plate
Akçay, Selma; Akdağ, Ünal (Inderscience Publishers, 2021)In this study, the heat transfer performance of an oscillating vertical flat plate is experimentally and numerically investigated. Rayleigh number (Ra), Womersley number (Wo), and dimensionless oscillation amplitude (Ao) ... -
The investigation of the heat transfer characteristics of a cross-flow pulsating jet in a forced flow
Akdağ, Ünal; Akçay, Selma; Demiral, Doğan (Begell House, 2017)In the present study, the effect of a transversely pulsating jet on heat transfer performance over a flat plate is investigated experimentally and numerically. A secondary mass flux by the transverse pulsating jet to the ... -
Mixed convection heat transfer from a vertical flat plate subjected to periodic oscillations
Akçay, Selma; Akdağ, Ünal (Yildiz Technical University, 2021)In this study, effects on mixed convection heat transfer of oscillation parameters on a vertical flat plate surface subjected to constant heat flux are experimentally and numerically investigated. The experimental setup ... -
Numerical analysis of thermal and hydraulic performance of pulsating nanofluid flow over cam-shaped tube bundles
Akçay, Selma; Akdağ, Ünal (Institute for Ionics, 2023)In this study, the hydraulic and thermal performance of laminar pulsating nanofluid flow over a cam-shaped tube bundle was investigated. Numerical solutions were carried out with the ANSYS Fluent software. As a working ... -
Prediction of heat transfer on a flat plate subjected to a transversely pulsating jet using artificial neural networks
Akdağ, Ünal; Kömür, Mehmet Aydın; Akçay, Selma (Elsevier, 2016)In this paper, the prediction of the heat transfer from a flat plate having constant heat flux subjected to a transversely pulsating jet is investigated through the use of artificial neural networks (ANNs). An experimental ... -
Pulsatif jet kullanarak düz levha yüzeyinden ısı transferinin iyileştirilmesi
Akçay, Selma (Aksaray Üniversitesi Fen Bilimleri Enstitüsü, 2015)Bu çalışmada, düz levha üzerinden akışta ısı transferine pulsatif jet etkisi, deneysel ve sayısal olarak incelenmektedir. Deneysel çalışma, rüzgâr tüneli içerisine yerleştirilmiş sabit ısı akısına sahip düz bakır levha ve ... -
Stacked Heterogeneous Ensemble Learning Model in Mixed Convection Heat Transfer from a Vertically Oscillating Flat Plate
Akçay, Selma; Buyrukoglu, Selim; Akdağ, Ünal (Osmaniye Korkut Ata Üniversitesi, 2023)In this study, the effects of mixed convection heat transfer from a moving vertical flat plate with an experimental and stacked heterogeneous ensemble learning approach are analyzed. In the experimental work, the effects ...
