Department of Mechanical Engineering, Article

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A comprehensive study on water jet guided laser micro hole drilling of an aerospace alloy Subasi, Levent; Gokler, Mustafa I.; Yaman, Ulaş (2023-09-01) Ultrasound emission monitoring Drilling of micro cooling holes on turbine components is of critical importance for the performance of a jet engine. Water jet guided laser is a convenient processing method to drill such hol...
Experimental and numerical investigation of melting and solidification enhancement using Fibonacci-inspired fins in a latent thermal energy storage unit Baghaei Oskouei, Seyedmohsen; Bayer, Özgür (2023-08-15) The major challenge with phase change materials (PCMs) is their low thermal conductivity, eventuating long melting (charging) and solidification (discharging) times in latent thermal energy storage (LTES) units. Using exte...
Effect of bypassing the heat transfer fluid on charging in a latent thermal energy storage unit Baghaei Oskouei, Seyedmohsen; Bayer, Özgür (2023-06-01) Horizontal latent thermal energy storage (LTES) systems that use phase change materials (PCMs) are popular and effective methods of alleviating the intermittency of renewable energy sources. The main issue of PCMs is their...
Microfluidic-based blood immunoassays TORUL, HİLAL; Arslan, Zeynep Çağlayan; Tezcan, Tuğba; Kayiş, Elif Çalık; Çalımcı, Merve; Gumustas, Aysen; Yıldırım, Ender; Külah, Haluk; TAMER, UĞUR (2023-05-10) Microfluidics enables the integration of whole protocols performed in a laboratory, including sample loading, reaction, extraction, and measurement steps on a single system, which offers significant advantages thanks to sm...
Failure behavior of on-site repaired CFRP laminates Sonat, Evren; Bakır, Mete; Özerinç, Sezer (2023-05-01) On-site repairs of carbon fiber reinforced polymer (CFRP) composites involve out-of-autoclave curing, which increases the defect density and reduces the mechanical properties. This work aims to understand the strength and ...
Evaluation of magnetocaloric behavior and refrigeration performance of Gd3Co10Al87 nanostructured thin film alloy with multiple Curie temperatures Bayer, Özgür; Baghaei Oskouei, Seyedmohsen; PAT, SUAT (2023-04-01) The Gd3Co10Al87 thin film was investigated since it contains a higher atomic rate of aluminum, an inexpensive, recyclable, and abundant material. A thermionic vacuum arc system deposited Gd3Co10Al87 nanostructured thin fil...
Comprehensive three-dimensional hydrodynamic and thermal modeling of steady-state operation of a flat grooved heat pipe Gökçe, Gökay; Kurt, Cem; Odabaşı, Gülnihal; Dursunkaya, Zafer; Çetin, Barbaros (2023-03-01) Mathematical modeling of grooved heat pipes is a challenging task since multiple coupled physical phenomena such as phase change, free-surface flow and heat transfer are involved. Moreover, the fact that the shape of the l...
Tunable mechanical properties of thermoplastic foams produced by additive manufacturing Alduais, Abdullah; Özerinç, Sezer (2023-3-01) Fused deposition modeling (FDM) is a versatile additive manufacturing technique for producing polymeric parts. Incorporating a foaming agent into the filament material enables the FDM-printing of thermoplastic foams, which...
Computational modelling of the proximal interphalangeal joint Yatağan, Koray Melih; Leblebicioglu, Gursel; Tönük, Ergin (2023-03-01)
Assessment of silicon, glass, FR4, PDMS and PMMA as a chip material for acoustic particle/cell manipulation in microfluidics Açıkgöz, Hande N.; Karaman, Alara; Şahin, M. Akif; Çaylan, Ömer R.; Büke, Göknur C.; Yıldırım, Ender; Eroğlu, İrem C.; Erson Bensan, Ayşe Elif; Çetin, Barbaros; Özer, Mehmet Bülent (2023-03-01) In the present study, the capabilities of different chip materials for acoustic particle manipulation have been assessed with the same microfluidic device architecture, under the same actuator and flow conditions. Silicon,...
A novel cascade latent heat thermal energy storage system consisting of erythritol and paraffin wax for deep recovery of medium-temperature industrial waste heat Yang, Sheng; Shao, Xue-Feng; Luo, Jia-Hao; Baghaei Oskouei, Seyedmohsen; Bayer, Özgür; Fan, Li-Wu (2023-02-15) Recovering medium-temperature (e.g., 150–180 °C) industrial waste heat through latent heat thermal energy storage (LHTES) can effectively attenuate the consumption of fossil fuels. However, the LHTES system containing a si...
Gradient-based optimization of micro-scale pressurized volumetric receiver geometry and flow rate Akba, Tufan; Baker, Derek Keıth; Mengüç, M. Pınar (2023-02-01) This study focuses on the design optimization of a micro-scale pressurized volumetric receiver by changing geometry and flow rate constrained by the volume, outlet air temperature, and outer surface temperature. The pressu...
Interplay of capillary and Marangoni flows in micropillar evaporation Yuncu, Goksel; Akkus, Yigit; Dursunkaya, Zafer (2023-2-01) The evaporation from a micropillar evaporator is a problem governed by various interfacial phenomena such as the capillarity-induced liquid flow, thin-film evaporation intensifying near the contact lines, and thermocapilla...
A weak-form spectral Chebyshev technique for nonlinear vibrations of rotating functionally graded beams Lotfan, Saeed; Dedekoy, Demir; Bediz, Bekir; Ciğeroğlu, Ender (2023-02-01) This study presents the spectral Chebyshev technique (SCT) for nonlinear vibrations of rotating beams based on a weak formulation. In addition to providing a fast-converging and precise solution for linear vibrations of st...
Investigation of flow and heat transfer behavior of integrated pin fin-aluminum foam heat sink ŞAHİN, Yiğit Serkan; TOPRAK, Beytullah İsmet; SOLMAZ, İsmail; Bayer, Özgür (2023-01-01) With the rapid development in the electronics industry, the thermal management of high power density elec-tronic products (HPDEPs) has become very important and requires innovative heat removal technologies. In this study,...
Steady and unsteady flow characteristics of dual cavity in strut injection scramjet combustor Rajesh, A.C.; Jeyakumar, S.; Jayaraman, Kandasamy; Karaca, Mehmet (2023-01-01) This study aims to understand the flow performance of a dual wall-mounted cavities in a strut-injector mounted scramjet combustor for steady-state and transient reacting conditions. Conventionally, two-dimensional Reynolds...
Dynamic stress concentrations around a single fiber break in unidirectional composites: a 3D finite element analysis Mutlu, Çağlar; SABUNCUOĞLU, BARIŞ; Kadioglu, F Suat; Swolfs, Yentl (2023-01-01) When a fiber break occurs in longitudinal tension of a unidirectional composite, dynamic stress concentrations arise, which can be different from the ones found considering only static loading. The current paper analyzes t...
Optimizing the orientation of solar photovoltaic systems considering the effects of irradiation and cell temperature models with dust accumulation Al-Ghussain, Loiy; Taylan, Onur; Abujubbeh, Mohammad; Hassan, Muhammed A. (2023-01-01) To cope with the growing installation capacities of solar photovoltaic (PV) systems in desert areas, it is necessary to revisit the energy production models and the optimal angles of PV panels given the significant impacts...
Solar Hybridization Paths for Cement Production Processes Polat, Onur; Tarı, İlker (2023-01-01) Cement industry is responsible for a significant portion of global carbon dioxide emissions leading to global warming and climate change. A substantial part of these emissions is due to burning fossil fuels to supply heat ...
Mechanical properties comparison of strut-based and triply periodic minimal surface lattice structures produced by electron beam melting Sokollu, Baris; Gulcan, Orhan; Konukseven, Erhan İlhan (2022-12-01) The aim of this study is to make a comparative assessment of the compression and tensile behavior of two strut -based (body-centered cubic, BCC, and face-centered cubic, FCC) and three triply periodic minimum surfaces (gyr...

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