Department of Mechanical Engineering, Article

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Supercooled erythritol for high-performance seasonal thermal energy storage Yang, Sheng; Shi, Hong-Yi; Liu, Jia; Lai, Yang-Yan; Bayer, Özgür; Fan, Li-Wu (2024-12-01) Seasonal storage of solar thermal energy through supercooled phase change materials (PCM) offers a promising solution for decarbonizing space and water heating in winter. Despite the high energy density and adaptability, n...
Accelerated 3D CFD modeling of multichannel flat grooved heat pipes Gökçe, Gökay; Çetin, Barbaros; Dursunkaya, Zafer (2024-10-01) Flat grooved heat pipes (HPs) have become essential in advanced thermal management solutions across various engineering applications. Modeling these devices, especially multichannel flat grooved HPs, involves significant c...
Material modeling and recent findings in transcatheter aortic valve implantation simulations Mutlu, Onur; Saribay, Murat; Yavuz, Mehmet Metin; Salman, Huseyin Enes; Al-Nabti, A.Rahman D.M.H.; Yalcin, Huseyin Cagatay (2024-10-01) Background and objective: Transcatheter aortic valve implantation (TAVI) has significantly transformed the management of aortic valve (AV) diseases, presenting a minimally invasive option compared to traditional surgical v...
Exploiting Matrix Stiffness to Overcome Drug Resistance Aydin, Hakan Berk; Özçelikkale, Altuğ; Acar, Ahmet (2024-07-05) Drug resistance is arguably one of the biggest challenges facing cancer research today. Understanding the underlying mechanisms of drug resistance in tumor progression and metastasis are essential in developing better trea...
Method development for estimation of bleed momentum coefficient using surface pressure measurements and in situ hot wire calibration Çetin, Cenk; Yavuz, Mehmet Metin (2024-07-01) Recently, as a passive flow control method, bleeding technique allowing flow of upstream towards suction side by interior passages, has been utilized on non-slender delta wing planforms, where effective geometries can enha...
Investigation of isothermal entropy change, relative cooling power, and refrigerant capacity of GdCoAl nanocomposite thin film by changing the Al ratio at low magnetic fields of 100 Oe and 1000 Oe Bayer, Özgür; PAT, SUAT (2024-07-01) There are two challenges with magnetocaloric materials (MCMs): the production of low-cost materials and the applicability of MCMs at low magnetic fields. Due to the abundance of Al, the effects of Al composition in GdCoAl ...
Optimization of variable pitch milling tools for improved chatter stability Özşahin, Orkun (2024-06-30) Chatter is an important problem in machining operations which causes poor surface quality, increased tool wear, failure of cutting tool and even machine tool, and excessive noise during machining hence reduced productivity...
Effects of translaminar edge crack and fiber angle on fracture toughness and crack propagation behaviors of laminated carbon fiber composites Asan, Ahmet Murat; Kaman, Mete Onur; Dağ, Serkan; Erdem, Serkan; Turan, Kadir (2024-06-01) In this study, the translaminar fracture toughness of carbon fiber laminated composites with different layer sequences was investigated experimentally and numerically for different crack directions. In the numerical study,...
Performance improvement in a vertical latent thermal energy storage tank with crossing heat transfer tubes Baghaei Oskouei, Seyedmohsen; Bayer, Özgür (2024-05-30) In a vertical latent thermal energy storage (LTES) tank, the lack of natural convection and domination of conduction results in a slow charging rate. On the other hand, due to large thermal resistances between the cold sur...
Simulation of crack closure effect on cracked beam vibrations Günhan, Dağhan; Acar, Bülent; Kadıoğlu, Fevzi Suat (2024-05-02) Vibrations of beams containing cracks are usually investigated by using open or breathing crack models. Neither one of these approaches considers the plasticity induced crack closure (PICC) phenomena which occurs in fatigu...
Investigation of the translaminar fracture behavior of the fiber-reinforced composites stitched perpendicular to their plane Asan, Ahmet Murat; Kaman, Mete Onur; Dağ, Serkan; Erdem, Serkan; Turan, Kadir (2024-05-01) To increase the fracture toughness, the two-dimensional laminated textiles can be stitched with fibers throughout their thickness. But the stitch properties effect the mechanical behavior of the composite plates. Because o...
Effect of impinging flow on hydrothermal characteristics of a pipe-network mini channel heatsink Salamatbakhsh, Elyas; Bayer, Özgür; SOLMAZ, İsmail (2024-05-01) In the current work, a lattice-structured mini channel heatsink is subjected to an impinging flow (IF) in which the flow enters from the top and exits from the lateral sides. An experimental setup is built, and numerical s...
HYPER-DATA: A MATLAB based optimization software for data-driven hyperelasticity Durna, Recep; Açan, Alp Kağan; Tikenogullari, Oguz Ziya; Dal, Hüsnü (2024-05-01) In this work, a parameter identification software for the data -driven hyperelasticity frameworks proposed by Dal et al. (Journal of the Mechanics and Physics of Solids 179, 105381, 2023), and Tikenogullariet al. (Journal ...
Mechanical Behaviour of Photopolymer Cell-Size Graded Triply Periodic Minimal Surface Structures at Different Deformation Rates Yılmaz, Yunus Emre; Novak, Nejc; Al-Ketan, Oraib; Erten, Hacer Irem; Yaman, Ulaş; Mauko, Anja; Borovinsek, Matej; Ulbin, Miran; Vesenjak, Matej; Ren, Zoran (2024-05-01) This study investigates how varying cell size affects the mechanical behaviour of photopolymer Triply Periodic Minimal Surfaces (TPMS) under different deformation rates. Diamond, Gyroid, and Primitive TPMS structures with ...
Effect of nanoheterogeneities on the fracture toughness and tensile ductility of CuTa metallic glass thin films Behboud, Ali B.; Fadaie, Amir; Motallebzadeh, Amir; ŞEHİRLİ, SERVET; Özerinç, Sezer (2024-04-05) Nanoheterogenenous metallic glasses (MG) can offer improved ductility through a nanoscale modulation in their mechanical properties. However, the relationship between the modulation parameters and the mechanical behavior i...
Effects of triaxiality and lode parameter on deep drawing process Güzelderen, Tolunay; Darendeliler, Haluk (2024-04-01) The aim of this study is to explore the effects of stress triaxiality and Lode angle parameter as a function of the cup height in the deep drawing process. For this purpose, deep drawing of square cups made of AISI304 stee...
Biochar gasification: Insights from pyrolysis atmospheres and gasification heating rates Akgül, Alican; Akın, Süleyman Şener; Güleç, Fatih; Kazanç Özerinç, Feyza (2024-03-15) Gasification is a promising technology for the synthesis of syngas and hydrogen, with char reactivity being a pivotal factor in the design of industrial gasifiers. Despite extensive studies on the gasification characterist...
Fracture toughness of AlTiN coatings investigated by nanoindentation and microcantilever bending Kaygusuz, Burçin; Motallebzadeh, Amir; Karadayı, Özcan; Kazmanlı, Muhammet Kürşat; Özerinç, Sezer (2024-02-15) Metal nitride coatings are increasingly used in MEMS applications. The brittle nature of these coatings makes fracture one of the main failure mechanisms during operation. Therefore, quantifying the fracture toughness of n...
Humanized brain organoids-on-chip integrated with sensors for screening neuronal activity and neurotoxicity Saglam-Metiner, Pelin; Yıldırım, Ender; Dincer, Can; Basak, Onur; Yesil-Celiktas, Ozlem (2024-01-01) The complex structure and function of the human central nervous system that develops from the neural tube made in vitro modeling quite challenging until the discovery of brain organoids. Human-induced pluripotent stem cell...
Close-contact melting and natural convection in unconstrained melting: A parametric study Baghaei Oskouei, Seyedmohsen; Li, Zi-Rui; Bayer, Özgür; Fan, Li-Wu (2024-01-01) Close-contact melting (CCM) is a phenomenon that can be achieved in latent thermal energy storage (LTES) units where the falling of solid PCM is realized. On the other hand, natural convection (NC) plays an important role ...

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