Department of Mechanical Engineering, Article

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Recent Submissions

Nonlinear vibrations and modal interactions in rotating pre-twisted blades with thickness and chord variations using high-fidelity models with DICFs and PA Lotfan, Saeed; Ciğeroğlu, Ender (2026-01-01) This study presents a high-fidelity investigation into the coupled in-plane and out-of-plane nonlinear vibration characteristics and modal interactions of rotating pre-twisted blades with variable thickness and chord lengt...
MIP-on-the-flow: Molecularly imprinted polymers in microfluidic sensing systems Okan, Meltem; Sanko, Vildan; Yıldırım, Ender; Tekin, H. Cumhur; Külah, Haluk (2026-01-01) The integration of molecularly imprinted polymers (MIPs) with microfluidic systems has emerged as a powerful strategy for developing selective and sensitive analytical platforms. As "artificial receptors," MIPs offer robus...
A local correlation-based algebraic transition model in k-ω SST formulation Okumu, Bilal; Baran, Özgür Uğraş; Baş, Onur (2026-01-01) A new correlation-based algebraic transition model using local variables is proposed. Instead of solving an additional transport equation for intermittency, the model employs an intermittency function that controls the sou...
Characterization of PCM melting behavior in a cavity including the effect of forced convection Adl, Houman Farshineh; Bayer, Özgür (2025-12-15) Enhancing heat transfer efficiency is crucial for improving the performance of systems designed for heat dissipation and thermal storage. Phase change materials (PCMs) offer favorable thermal characteristics but are hinder...
Estimating Muscle Forces in Patients With Cerebral Palsy During Walking Using Static Optimization and Computed Muscle Control Kidwai, Alina Nawab; Atmaca, Kerim; Tönük, Ergin; Arslan, Yunus Ziya (2025-12-01) Cerebral palsy (CP) is a group of neurological disorders that presents significant challenges for clinical rehabilitation. While muscle forces could aid clinical decision-making, direct in vivo measurement is infeasible an...
Torsional characteristics of a novel infill pattern in material extrusion type of additive manufacturing: random lines Kaya, Huseyin; Yaman, Ulaş (2025-11-12) The selection of an appropriate infill pattern in Fused Filament Fabrication (FFF) plays a critical role in determining both mechanical performance and production efficiency, as it directly influences interlayer adhesion. ...
Effect of water-filled cylindrical 4340 steel chamber length and sidewall thickness on shaped charge jet penetration Gulyasar, Fuat; Yıldırım, Raif Orhan (2025-11-07) This paper assesses how effective a water-filled cylindrical chamber, constructed using 4340 steel with a 20 mm internal diameter but varying in length and sidewall thickness, is at protecting against M85-shaped charge amm...
Characterization of Flow Structure and Wall Shear Stress in Patient-Specific Abdominal Aortic Aneurysm Phantom Using Particle Image Velocimetry Susar, Mehmet Anll; Yllmaz, Oǧuzhan; Fathipour, Amirhossein; Mutlu, Onur; Mazhar, Noaman; El-Menyar, Ayman; Al-Thani, Hassan; Yalçln, Hüseyin Çaǧatay; Yavuz, Mehmet Metin (2025-11-01) Abdominal aortic aneurysm (AAA) is an irreversible dilation of the abdominal aorta that carries a significant risk of rupture if not adequately screened and treated. This condition poses a severe threat, with a mortality r...
Thermochemical processing of organic wastes for sustainable valorisation and energy recovery: A review of recent contributions to the field Gömeç, Çiğdem; Dalkılıç, Kenan; PERENDECİ, NURİYE ALTINAY; Güngörmüşler, Mine; Somorin, Tosin; Roussel, Jimmy; VAROL, MURAT; Ramos, Ana; van Hullebusch, Eric D.; Trubetskaya, Anna; Kazanç Özerinç, Feyza; Vasić, Milica; Akan, Aytac Perihan; Ugurlu, Aysenur; Marchetti, Jorge; Balasundararajan, Viveka; Kikas, Timo (2025-10-01) This paper reviews the current knowledge on the thermochemical processing of organic waste for sustainable valorisation and presents its impacts on energy recovery. We focused on novel, low-cost, and highly efficient therm...
Effect of bio-inspired leading-edge modifications on aerodynamic performance of a non-slender delta wing Dikbas, D.; Güneş, Erdoğan; Kocak, G.; Yavuz, Mehmet Metin (2025-09-09) The effect of the bio-inspired leading-edge modifications on the aerodynamic performance of non-slender delta wing models was investigated in a low-speed wind tunnel using force and surface pressure measurements. The measu...
Rapid bacterial detection through microfluidic integration with a glucometer Eryilmaz, Merve; İLBASMIŞ TAMER, SİBEL; Panhwar, Sallahuddin; Tayyarcan, Emine Kübra; BOYACI, İSMAİL HAKKI; Suludere, Zekiye; ÇETİN, DEMET; Zengin, Adem; Yıldırım, Ender; TAMER, UĞUR (2025-08-01) We present a novel approach for sensitive and portable detection of pathogenic bacteria, which is crucial for household and clinical practice. Our method employs immunoliposomes, antibodies, and microchip to detect specifi...
Multilayer integrated acoustofluidic device for multistage particle manipulation Açıkgöz, Hande N; Atay, Atakan; Karaman, Alara; Özer, Mehmet Bülent; Çetin, Barbaros (2025-07-31) In this study, we present a multilayer integrated acoustofluidic device for multistage microparticle manipulation, which combines acoustic size-based separation and enrichment within a compact architecture. The device is c...
Cooling optimization for concentrating photovoltaic modules: A study of convective and radiative cooling with a focus on plate fin applications Değirmenci, Deniz; Çubuk, Ertuğrul; Tarı, İlker; SELİMOĞLU, ÖZGÜR (2025-07-01) This study investigates a passive cooling system for horizontal concentrating (Hor-Con) photovoltaic (PV) modules. Maintaining operating temperatures within an optimal range is crucial for efficiency, as in concentrating p...
Thermal performance of combined annular and longitudinal fins-on-tube units in natural convection Salamatbakhsh, Elyas; Bayer, Özgür (2025-05-15) To enhance heat transfer in natural convection, annular and longitudinal fins have extensive usage in the industry and have been vastly studied in the literature. The current study investigates horizontal tubes with novel ...
Comprehensive characterization of a pneumatic active flow control system using in-situ hot wire calibration Çetin, Cenk; Yavuz, Mehmet Metin (2025-03-01) Pneumatic active flow control systems have great potential to control the aerodynamic phenomena including, separation, circulation, and turbulence. To quantify the effectiveness of such flow control schemes, thorough chara...
The influence of slotted solid cylindrical fin with aluminum foam insert on the thermal and hydraulic characteristics of air-cooled pin-fin heat sink Bayrak, Fatih Taha; TOPRAK, Beytullah İsmet; SOLMAZ, İsmail; Bayer, Özgür (2025-03-01) This study basically aims to enhance the heat removal performance of conventional solid cylindrical pin-finned heat sinks while maintaining a tolerable pressure drop by inserting porous aluminum material into the slots at ...
Impact of nitrogen and alkali dopants on pore architecture and surface functionalities of biochar in one-step CO2 pyrolysis Akın, Süleyman Şener; Kır, Ali Bertan; Kazanç Özerinç, Feyza (2025-03-01) This study aims to elucidate the roles of common nitrogen dopants (melamine (M) and ammonium chloride (ACL)) and alkali agents (KOH (K) and NaOH (N)) on surface functional groups, pore architectures, and degrees of graphit...
Finite Element Analysis of Evolut Transcatheter Heart Valves: Effects of Aortic Geometries and Valve Sizes on Post-TAVI Wall Stresses and Deformations Mutlu, Onur; Mazhar, Noaman; Saribay, Murat; Yavuz, Mehmet Metin; Ozturk, Deniz; Ghareeb, Abdel Naser; Alnabti, Abdulrahman; Yalcin, Huseyin Cagatay (2025-02-01) Background/Objectives: For transcatheter aortic valve implantation (TAVI) therapy, a catheter-guided crimped valve is deployed into the aortic root. Valve types such as Edwards balloon-expandable valves and Medtronic self-...
Coupled thermo-elastic dynamics of rotating pre-twisted blades exposed to thermal shock including nonlinear rotational effects Lotfan, Saeed; Ciğeroğlu, Ender (2025-01-05) Rotating blades operating under high-temperature experience intense mechanical and thermal stresses induced by centrifugal forces and thermal shock. In this research, to address this critical yet understudied topic, couple...
Layer path updating algorithm based on Voronoi diagrams for material extrusion additive manufacturing ÖZCAN, MELİH; Hergul, Yigit; Yaman, Ulaş (2025-01-01) In Material Extrusion (MEX) types of Additive Manufacturing (AM) technologies, the continuity of the trajectories affects the surface quality of the artifacts manufactured and the time of fabrication. Continuous paths resu...

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