Department of Mechanical Engineering

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Mechanical engineering. (231)
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Recent Submissions

Supercritical extraction of biomass as an effective pretreatment step for the char yield control in pyrolysis Trubetskaya, Anna; Budarin, Vitaliy; Arshadi, Mehrdad; Magalhães, Duarte; Kazanç Özerinç, Feyza; Hunt, Andrew John (2021-06-01) © 2021 The Author(s)This work demonstrates that the coupling of supercritical carbon dioxide extraction with pyrolysis is an effective method for the removal of extractives from forestry residues and generation of solid ch...
Prediction of yields and composition of char from fast pyrolysis of commercial lignocellulosic materials, organosolv fractionated and torrefied olive stones Magalhães, Duarte; Gürel, Kaan; Matsakas, Leonidas; Christakopoulos, Paul; Pisano, Italo; Leahy, J.J.; Kazanç Özerinç, Feyza; Trubetskaya, Anna (Elsevier BV, 2021-04-01) © 2020 The Author(s)This study investigated the fast pyrolysis behaviour of torrefied olive stones, fractionated olive stones and lignocellulosic commercial compounds. Olive stones were reacted in a continuous industrial t...
Radiative heat transfer in the discrete element method using distance based approximations Johnson, Evan F.; Tarı, İlker; Baker, Derek Keıth (2021-03-01) A model to estimate radiative heat transfer in particle beds is developed for use in the Discrete Element Method (DEM). Monte Carlo ray tracing simulations are run to find the Radiation Distribution Factor (RDF) between pa...
models, EXperiments and high PERformance computing for Turbine mechanical Integrity and Structural dynamics in Europe (EXPERTISE) Özgüven, Hasan Nevzat(2021-2-28) Energy and Mobility are two primary driving forces in the 21st century. Development of incremental and disruptive technologies will have key impacts on the world’s societies, and on safety, security and competitiveness of ...
Investigation of the structural, magnetic, and cooling performance of AlFe thin film and AlFeGd nanometric giant magnetocaloric thin films Pat, Suat; Bayer, Özgür; Akay, Sertan Kemal; Mohammadigharehbagh, Reza; Kaya, Metin (Springer Science and Business Media LLC, 2021-02-01) Giant magnetocaloric thin films are promising materials for new generation energy-efficient cooling systems. To investigate the cooling performance of AlFe and AlFeGd alloys, thin films have been deposited onto a glass sub...
Mechanical properties of thermoplastic parts produced by fused deposition modeling: a review Bakir, Ali Alperen; Atik, Resul; Özerinç, Sezer (2021-02-01) Purpose - This paper aims to provide an overview of the recent findings of the mechanical properties of parts manufactured by fused deposition modeling (FDM). FDM has become a widely used technique for the manufacturing of...
Interactions during CO2Co-gasification of Biomass and Coal Chars Obtained from Fast Pyrolysis in a Drop Tube Furnace Magalhães, Duarte; Akgül, Alican; Kazanç Özerinç, Feyza; Costa, Mário (2021-01-01) © 2021 American Chemical Society.This work investigated the co-gasification of biomass and coal chars obtained from fast pyrolysis (1000 °C, ∼104 °C s-1) in a drop tube furnace. Olive residue and Soma lignite were fast-pyr...
Current trends and research opportunities in hybrid additive manufacturing Dilberoğlu, Mecid Uğur; Gharehpapagh, Bahar; Yaman, Ulaş; Dölen, Melik (2021-01-01) Despite the rapid growth in the past decade, the industrial adoption of additive manufacturing has not still been achieved due to certain limitations. A recent trend to alleviate its inherent drawbacks is to integrate addi...
A self-adaptive landmark-based aggregation method for robot swarms Sadeghi Amjadi, Arash; Raoufi, Mohsen; Turgut, Ali Emre (2021-01-01) Aggregation, a widely observed behavior in social insects, is the gathering of individuals on any location or on a cue. The former being called the self-organized aggregation, and the latter being called the cue-based aggr...
Flow rate-controlled pipetting for microfluidics: second-generation flexible hydraulic reservoir (FHRv2) Atay, Atakan; Topuz, Alper; Sariarslan, Buesra; Yıldırım, Ender; Charmet, Jerome; Couling, Kevin; ÇETİN, BARBAROS (Springer Science and Business Media LLC, 2021-01-01) A critical component of microfluidic technology is the fluid pumping mechanism. Syringe and pressure pumps are typically used in the lab environment; however, their operations generate considerable dead volume that is ofte...
Numerical and experimental investigation of acoustophoretic microfluidic devices Şahin, Mehmet Akif; Özer, Mehmet Bülent; Department of Mechanical Engineering (2021-1) Acoustophoresis is one of the techniques to manipulate suspended particles to intended positionsin continuous flow. In this study, a numerical simulation methodologythatcouples electro-mechanic, solid,and ac...
An extended eight-chain model for hyperelastic and finite viscoelastic response of rubberlike materials: Theory, experiments and numerical aspects Dal, Hüsnü; Gültekin, Osman; Açıkgöz, Kemal (Elsevier BV, 2020-12-01) Rubberlike materials exhibit strong rate-dependent mechanical response which manifests itself in creep and relaxation tests as well as in the hysteresis curves under cyclic loading. Unlike linear viscoelasticity, creep and...
A theoretical framework for comprehensive modeling of steadily fed evaporating droplets and the validity of common assumptions Akkus, Yigit; ÇETİN, BARBAROS; Dursunkaya, Zafer (Elsevier BV, 2020-12-01) A theoretical framework is established to model the evaporation from continuously fed droplets, promising tools in the thermal management of high heat flux electronics. Using the framework, a comprehensive model is develop...
Development of silica fume-based geopolymer foams Shakouri, Sahra; Bayer, Özgür; Erdoğan, Sinan Turhan (Elsevier BV, 2020-11-01) Thermal insulation materials are critical for reducing the energy consumption and carbon emissions associated with buildings. A good insulation material must not only have low density and sufficient mechanical properties b...
An experimental and numerical study on the combustion of lignites from different geographic origins Özer, Burak; Debiagi, Paulo Eduardo Amaral; Hasse, Christian; Faravelli, Tiziano; Kazanç Özerinç, Feyza (Elsevier BV, 2020-10-15) Coal combustion involves multi-scale, multi-phase and multi-component aspects, in a process where both transport phenomena and reaction kinetics must be considered. The aim of the work is to investigate the differences bet...
A frequency domain nonparametric identification method for nonlinear structures: Describing surface method Karaagacli, Taylan; Özgüven, Hasan Nevzat (Elsevier BV, 2020-10-01) In this paper a new method called 'Describing Surface Method' (DSM) is developed for nonparametric identification of a localized nonlinearity in structural dynamics. The method makes use of the Nonlinearity Matrix concept ...
An engineered pancreatic cancer model with intra-tumoral heterogeneity of driver mutations Moon, Hye-ran; Ozcelikkale, Altug; Yang, Yi; Elzey, Bennett D.; Konieczny, Stephen F.; Han, Bumsoo (Royal Society of Chemistry (RSC), 2020-10-01) Pancreatic ductal adenocarcinoma (PDAC) is a complex disease with significant intra-tumoral heterogeneity (ITH). Currently, no reliable PDAC tumor model is available that can present ITH profiles in a controlled manner. We...
Oblique surface cracking and crack closure in an orthotropic medium under contact loading Toktaş, Selim Ercihan; Dağ, Serkan (Elsevier BV, 2020-10-01) This article presents analytical methods for analysis of an inclined surface crack in an orthotropic medium subjected to contact loading. Governing partial differential equations are derived in accordance with plane theory...
Design of a tuned vibration absorber for a slender hollow cylindrical structure Aksoy, Tuğrul; Özgen, Gökhan Osman; Acar, Bülent (Informa UK Limited, 2020-09-01) In this paper, details of the design work for a tuned vibration absorber to be used on a hollow cylindrical structure is presented. The vibration problem is of resonant type and the tuned vibration absorber is designed to ...
A study on the effects of various combustion parameters on the mineral composition of Tuncbilek fly ash Akin, Suleyman Sener; Magalhaes, Duarte; Kazanç Özerinç, Feyza (Elsevier BV, 2020-09-01) This study investigated the mineral composition and morphology of ash obtained from laboratory equipment and power plant fly ash from a Turkish lignite. In accordance with this purpose, combustion experiments were conducte...