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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...
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...
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 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...
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 ...
A rotary extrusion system with a rectangular-orifice nozzle: toward adaptive resolution in material extrusion additive manufacturing Gharehpapagh, Bahar; Dilberoglu, Ugur M.; Yaman, Ulaş; Dolen, Melik (2024-01-01) Material extrusion additive manufacturing (MEAM) has revolutionized the production of complex designs while minimizing the amount of effort required due to its simple production pipeline. However, MEAM naturally comes with...
Predictive search model of flocking for quadcopter swarm in the presence of static and dynamic obstacles Önür, Giray; Turgut, Ali Emre; Şahin, Erol (2024-01-01) One of the main challenges in swarm robotics is to achieve robust and scalable flocking, such that large numbers of robots can move together in a coordinated and cohesive manner while avoiding obstacles or threats. Flockin...
Dual Horizon Peridynamic Approach for Studying the Effect of Porous Media on the Dynamic Crack Growth in Brittle Materials Altay, Ugur; DÖRDÜNCÜ, MEHMET; Kadıoğlu, Fevzi Suat (2024-01-01) This study aims to investigate the effect of the stop-hole configurations on dynamic cracks using the dual-horizon peridynamic approach (DHPD). The traditional PD formulations require uniform discretization for the solutio...
Development of a dynamic simulation model for CNC table vibration estimation in milling operations Frezeleme işleminde CNC tabla titreşimlerinin kestirimi için dinamik simülasyon modeli geliştirilmesi Altun, Barış; Çalışkan, Hakan; Özşahin, Orkun (2024-01-01) Recent developments under Industry 4.0 allows to collect and analyze measurements during milling process. For such projects to be done, software needs to be developed. Developing software through testing is expensive and t...
Tumor-Microenvironment-on-Chip Platform for Assessing Drug Response in 3D Dynamic Culture Aydin, Hakan Berk; Moon, Hye-Ran; Han, Bumsoo; Özçelikkale, Altuğ; Acar, Ahmet (2024-01-01) Microphysiological systems involving microfluidic 3D culture of cancer cells have emerged as a versatile toolkit to study tumor biological problems and evaluate potential treatment strategies. Incorporation of microfluidic...
MAGNETOELECTROELASTIC RESPONSE OF FUNCTIONALLY GRADED MULTIFERROIC COATINGS UNDER MOVING HERTZIAN CONTACT Toktaş, Selim Ercihan; Dağ, Serkan (2024-01-01) A multilayer approach is developed to solve the moving Hertzian contact problem involving a circular punch and a functionally graded multiferroic coating. The mathematical model constructed consists of arbitrary numbers of...
Sodium salt surface interactions affect single particle combustion behavior of biomass, coal, and their chars Akın, Süleyman Şener; Akgül, Alican; Kazanç Özerinç, Feyza (2023-12-15) Sodium salt additions provide an effective route for tuning the combustion behavior of solid fuels. The salt-fuel surface interactions play a key role in combustion, as demonstrated by low heating rate experiments. High he...
Data-driven hyperelasticity, Part II: A canonical framework for anisotropic soft biological tissues TİKENOĞULLARI, OĞUZ ZİYA; Açan, Alp Kağan; Kuhl, Ellen; Dal, Hüsnü (2023-12-01) In this work, we present a novel anisotropic data-driven hyperelasticity framework for the constitutive modeling of soft biological tissues that allows direct incorporation of experimental data into the constitutive model,...
Design of a microfluidic device for immunoaffinity-based isolation of circulating tumor cells with minimal clogging Sen-Dogan, Begum; Yıldırım, Ender; Sahin, Sebnem; Ozgur, Ebru; Zorlu, Ozge; Külah, Haluk (2023-12-01) Combining bioaffinity-based techniques with microfluidics is an effective strategy for the selective isolation of rare circulating tumor cells (CTCs) among peripheral blood cells. In this scope, designing a microfluidic ch...
An improved peridynamic approach for fatigue analysis of two dimensional functionally graded materials Altay, Ugur; DÖRDÜNCÜ, MEHMET; Kadıoğlu, Fevzi Suat (2023-12-01) This study investigates the fatigue behavior of functionally graded materials (FGMs) within an enhanced peridynamic (PD) framework that eliminates the need for surface and volume correction factors. FGMs offer mechanical a...
Elliptical pillars for the thermal performance enhancement of micro-structured evaporators Yuncu, Goksel; Akkus, Yigit; Dursunkaya, Zafer (2023-11-01) In this study, we propose and investigate the employment of elliptical micropillars as a novel evaporator wick structure to boost the performance of capillarity-driven two-phase heat spreaders through high-fidelity numeric...

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