Barışık, Murat
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Barisik, M
Barisik, Murat
Barisik, M.
Barışık, M.
Barışık, M
Barisik, Murat
Barisik, M.
Barışık, M.
Barışık, M
Job Title
Email Address
muratbarisik@iyte.edu.tr
Main Affiliation
03.10. Department of Mechanical Engineering
Status
Former Staff
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Sustainable Development Goals
1NO POVERTY
0
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2ZERO HUNGER
0
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3GOOD HEALTH AND WELL-BEING
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4QUALITY EDUCATION
0
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5GENDER EQUALITY
0
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6CLEAN WATER AND SANITATION
1
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7AFFORDABLE AND CLEAN ENERGY
6
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8DECENT WORK AND ECONOMIC GROWTH
0
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9INDUSTRY, INNOVATION AND INFRASTRUCTURE
11
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10REDUCED INEQUALITIES
0
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11SUSTAINABLE CITIES AND COMMUNITIES
0
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12RESPONSIBLE CONSUMPTION AND PRODUCTION
2
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13CLIMATE ACTION
4
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14LIFE BELOW WATER
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15LIFE ON LAND
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16PEACE, JUSTICE AND STRONG INSTITUTIONS
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17PARTNERSHIPS FOR THE GOALS
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Documents
69
Citations
1934
h-index
25
Documents
61
Citations
1769
Scholarly Output
57
Articles
37
Views / Downloads
44083/19311
Supervised MSc Theses
10
Supervised PhD Theses
3
WoS Citation Count
774
Scopus Citation Count
839
Patents
0
Projects
8
WoS Citations per Publication
13.58
Scopus Citations per Publication
14.72
Open Access Source
35
Supervised Theses
13
| Journal | Count |
|---|---|
| Microfluidics and Nanofluidics | 4 |
| International Journal of Heat and Mass Transfer | 3 |
| Journal of Composite Materials | 2 |
| Physical Chemistry Chemical Physics | 2 |
| Journal of Physical Chemistry C | 2 |
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57 results
Scholarly Output Search Results
Now showing 1 - 10 of 57
Conference Object Improvement of the Joining Performance of Fiber-Reinforced Composite With Pa66 Nanofibers Produced by the Electrospinning Method(The Composites and Advanced Materials Expo (CAMX), 2023) Esenoğlu,G.; İriş,M.E.; Dehneliler,S.; Tanoğlu,M.; Barışık,M.; Aktaş,E.In this study, electrospun polyamide-6.6 (PA 66) nanofibers were added to bond surfaces to improve the bond strength of a structural fiber-reinforced composite. For this purpose, the nanofiber were coated on the UD carbon/epoxy prepregs. Composite laminates were fabricated using the autoclave method, employing carbon/epoxy prepregs with/without PA66 nanofiber incorporation of bond region. A single lap shear, Charpy impact energy and Mode-I fracture toughness tests were applied to the reference and PA 66 coated samples to examine the effects of PA 66 nanofibers on the mechanical properties of the joint region of the composites. The morphology and fracture modes of the nanofibers were investigated by scanning electron microscopy (SEM). The thermal properties of PA66 nanofibers were investigated by the differential scanning calorimetry (DSC) method. It was found that the PA 66 nanofibers coated on the prepreg surfaces by electrospinning are very effective in improving the strength of composite joints. The results revealed that single lap shear and Charpy impact strength values of the composite joint are increased by about 79% and 24%, respectively, by coating PA 66 nanofibers to the joint region. The results also showed that by using PA 66 nanofibers, Mode-I fracture toughness value is improved by about 107% and Tg was not affected. Copyright © 2023. Used by CAMX - The Composites and Advanced Materials Expo with permission.Article Citation - WoS: 4Citation - Scopus: 5Analytical Solution of Micro-/Nanoscale Convective Liquid Flows in Tubes and Slits(Springer, 2017) Kalyoncu, Gülce; Barışık, MuratAnalytical solutions examining heat transport in micro-/nanoscale liquid flows were developed. Using the energy equation coupled with fully developed velocity, we solved developing temperature profiles with axial conduction and viscous dissipation terms. A comprehensive literature review provided the published range of velocity slip and temperature jump conditions. While molecular simulations and experiments present constant slip and jump values for a specific liquid/surface couple independent of confinement size, non-dimensional forms of these boundary conditions were found appropriate to calculate non-equilibrium as a function of flow height. Although slip and jump conditions are specific for each liquid/surface couple and hard to obtain, we proposed modeling of the slip and jump as a function of the surface wetting, in order to create a general, easy to measure methodology. We further developed possible correlations to calculate jump using the slip value of the corresponding surface and tested in the results. Fully developed Nu showed strong dependence on slip and jump. Heat transfer stopped when slip and jump coefficients became higher than a certain value. Strong variation of Nu in the thermal development length was observed for low slip and jump cases, while an almost constant Nu in the flow direction was found for high slip and jump coefficients. Variation of temperature profiles was found to dominate the heat transfer through the constant temperature surface while surface and liquid temperatures became equal at heat transfer lengths comparable with confinement sizes for no-dissipation cases. In case of non-negligible heat dissipation, viscous heating dominated the Nu value by enhancing the heating while decreasing the heat removal in cooling cases. Implementation of proposed procedure on a micro-channel convection problem from a micro-fluidics application showed the dominant effect of the model defining the slip and jump relationship. Direct use of kinetic gas theory resulted in an increase of Nu by an increase in non-equilibrium, while models developed from published liquid slip and jump values produced an opposite behavior.Master Thesis Molecular Dynamics Studies on Heat Transfer Control Between Water and Silica Using Nanoscale Surface Patterns(01. Izmir Institute of Technology, 2020) Özen, Celal Can; Barışık, Murat; Barışık, MuratDue to recent advances in manufacturing, component sizes have tremendously decreased in computer electronics and communication devices. Miniaturization has led to a substantial increase in memory and computational power but also created heat dissipation problems. Understanding heat transfer and temperature distribution in these devices became crucial for thermal management. At nanoscale, heat transfer through dielectric materials is mostly determined by phonon transport. The phonon passage is interrupted through the interfaces which creates temperature jumps and dominates the heat transfer rates at nanoscale. Kapitza length characterizes the interfacial thermal resistance as a function of temperature jump at the solid-liquid interface. In this study, heat transfer from different nanoscale surface structures were investigated using Molecular Dynamics simulations. The systems were created by two parallel silica walls and water between them. Kapitza length values were calculated for seven different surface conditions for two different molecular surface interaction strength parameters yielding high and low wetting conditions. Measured Kapitza length values were characterized based on cavity width (w), cavity height (h), and unit crystal cavity volume (Vc). While the increase in pattern cavity width increased Kapitza length, increasing pattern cavity height decreased Kapitza value. However, a general characterization based on cavity volume could not be obtained. Instead, almost a uniform behavior was observed through the variation of Kapitza length of different size patterns as a function of Ac=Vch/w^2. Kapitza length decreased by approximately 19% and 29% for high and low wetting conditions, respectively, when Ac increased. Then, similar characterizations were done for variation of heat flux. Overall, heat flux increased by approximately 20% and 30% for high and low wetting conditions, respectively, when Ac increased. Results are important to better understand and control heat transfer between water and silica using nanoscale surface patterns.Conference Object Investigation of Nanoscale Droplet Evaporation by Molecular Dynamics Simulations(Begell House, inc, 2022) Satiroglu, Ezgi; Barisik, MuratHeat transfer by boiling is promising for future thermal management problems. The phase change during boiling condition is interrupted by a vapor layer forming between the liquid and solid, which is called as the Leidenfrost phenomena. Leidenfrost develops strongly depending on the solid/liquid coupling at the interface. For such a case, we studied evaporation behavior of water droplets at nanoscale under varying wetting conditions in order to characterize the Leidenfrost effects. While the experimental analysis is challenging, we employed Molecular Dynamics simulations of water droplets over silica surfaces to investigate Leidenfrost at nanoscale. As a continuation of our earlier work on size dependent influence of contact line pinning on wetting of nano-textured/patterned silica surfaces. Evaporation of the different size droplets were simulated over silica surfaces with different nanopatterns. We observed that the thermal transport at the solid-liquid interface showed strong dependence on surface wetting and Leidenfrost temperature. Specifically, a sudden increase in the interface thermal resistance was observed when the droplet temperature reached to the Leidenfrost point, and the heat transfer decreased significantly. Increasing the size of the surface structures pushed the Leidenfrost point to higher surface temperatures.Article Citation - WoS: 18Citation - Scopus: 17Wetting of Single Crystalline and Amorphous Silicon Surfaces: Effective Range of Intermolecular Forces for Wetting(Taylor and Francis Ltd., 2020) Özçelik, Hüseyin Gökberk; Özdemir, Abdullah Cihan; Kim, Bohung; Barışık, MuratWetting at nanoscale is a property of a three-dimensional region with a finite length into the solid domain from the surface. Understanding the extent of the solid region effective on wetting is important for recent coating applications as well as for both crystalline and amorphous solids of different atomic ordering. For such a case, we studied the wetting behaviour of silicon surfaces at various crystalline and amorphous states. Molecular distributions of amorphous systems were varied by changing the amorphisation conditions of silicon. Semi-cylindrical water droplets were formed on the surfaces to be large enough to remain independent of line tension and Tolman length effects. Contact angles showed up to 38% variation by the change in the atomic orientation of silicon. Instead of a homogeneous solid density definition, we calculated different solid densities for a given surface measured inside different extents from the interface. We correlated the observed wetting variation with each of these different solid densities to determine which extent governs the wetting variation. We observed that the variation of solid density measured inside a 0.13 nm extent from the surface reflected the variation of wetting angle better for both single crystalline and amorphous silicon surfaces.Master Thesis Numerical Investigations of Flash-Boiling Gasoline Direct Injection Sprays(Izmir Institute of Technology, 2019) Oral, Orhan; Barışık, Murat; Barışık, Murat; Çelik, HasanGasoline Direct Injection (GDI) system is a new technology that is the combination of injection in diesel engines and ignition in gasoline engines. Comparing with the conventional methods of injection, it has many advantages including, fuel economy, higher engine power, lower engine knock tendency, NOx and cold-start HC emission rates. The operation of the GDI engine is affected by the processes of fuel injection, spray atomization and vaporization, charge cooling, air/fuel mixture preparation, and incylinder charge motion. Therefore, numerical modeling has an important role to improve all these factors affecting the engine. This thesis focuses on numerical analyses of the fuel sprays injected into a constant volume chamber by a single hole GDI injector under flash-boiling and non-flashboiling conditions. The aim of this thesis is to develop a numerical model that can be used in flash-boiling spray simulations and to validate the results of the numerical model against experimental data in terms of spray angle and spray penetration. Initially the GDI sprays were simulated by the standard spray simulation model of OpenFOAM solver package that was tuned for gasoline injections. Then the model was modified for both non-flashing and flashing spray simulations and the results were compared with experimental ones. It is concluded that; discharge coefficient and spray initial angle have critical impacts on the numerical results.Master Thesis Molecular Dynamics Studies on Wetting Behavior of Silicon Surfaces and Heat Transfer Characteristics of Electrolyte Solution Filled Silicon Nano-Channels(Izmir Institute of Technology, 2020) Özdemir, Abdullah Cihan; Barışık, Murat; Barışık, MuratSilicon has always been of interest to researchers from various fields, especially the semiconductor industry. Silicon and silicon-based materials are frequently used in integrated circuits and micro/nano-electro-mechanical systems. Interfacial phenomena between phases is important for these applications. In this study, surface wetting and heat transfer at the solid/liquid interfacial region were investigated using the Molecular Dynamics method. The control of wetting was examined by changing silicon structure at single crystal and amorphous forms and was correlated with the surface coating thickness. Contact angles on both single crystal and amorphous surfaces were calculated. To understand the molecular regions affecting the contact angle, the near interface height parameter was defined as the distance from the surface. Then, interface densities and contact angles of single crystal and amorphous structures were calculated at each height parameter. We defined an effective range of intermolecular forces for the control of wetting. Second, heat transfer characteristics at water/silicon interfaces were examined. Solid/liquid interface is important to determine heat transfer at nanoscale. We focused on the influence of ionic conditions on heat transfer for a water-NaCl solution between two silicon walls. The surface charge density showed variation by ionic condition. We calculated surface charges naturally forming at the corresponding electrolyte concentration. With the increase in salinity, the electrolyte solution density increased and thermal conductivity decreased. Results showed good agreement with the experimental measurements. Additionally, we observed a 35% increase in heat transfer due to a decrease in interfacial thermal resistance by increasing ionic concentration to the highest salinity value of standard conditions. Heat transfer at solid/liquid interface characterized by Kapitza length was correlated with the salinity.Conference Object Effect of Electric Field on Interfacial Thermal Resistance Between Silicon and Water at Nanoscales(Avestia Publishing, 2019) Yenigün, Onur; Barışık, MuratIn this study, heat transfer rate of a nano-confined liquid is controlled by applying an electric field parallel to the heat transfer direction. Molecular Dynamics simulations are performed for deionized water confined between silicon slabs, where their surfaces oppositely charged to create an electric field perpendicular to the silicon wall to promote the electrowetting. Electric field strengths used in this study are 0, 0.18 and 0.35 V/nm. To investigate the effect of electric field on heat transfer, first water density profiles near the silicon walls are examined. Results shows that by applying electric field, water molecules near the silicon walls develop layering, which indicates the increased solid/liquid coupling. With the increasing electric field strength, an increase in the peak of the density layering is observed. Furthermore, heat transfer at the solid/liquid interface is characterized with the Kapitza length values. The results show that applying electric field reduces the interfacial thermal resistance between water and silicon due to the increased solid/liquid coupling and doubles the total heat flux. © 2019, Avestia Publishing.Article Silika Yüzeylerin Islanma Hareketlerinin Moleküler Dinamik ile Modellenmesi(Gazi Üniversitesi, 2018) Barışık, MuratYeni üretim tekniklerine paralel olarak nano-boyutlu teknolojiler çok geniş bir uygulama alanında kullanılmaya başlanmakta ve yeni uygulamalar geliştirmek için keşfedilmesi ve anlaşılması gereken konular süratle artmaktadır. Bu doğrultuda, yeni uygulamalarda sıkça yer bulan silikon ve silikon-dioksitin mikro/nano boyutlardaki malzeme özelliklerinin anlaşılmasına büyük ihtiyaç oluşmaktadır. Özellikle bu yüzeylerin ıslanma hareketlerinin anlaşılabilmesi ve hatta kullanılacak uygulamaya göre ayarlanabilmesi sayısız uygulama için önem arz etmektedir. Bu nedenlerle, nano-teknolojide sıkça kullanılan silikon-dioksit malzemesinin ve su moleküllerinin nano-ölçeklerde moleküler olarak modellenmesi bu çalışmada gerçekleştirildi. Modelleme molekuler dinamik hesaplamaları ile yapıldı. Silikon-dioksit yüzey üzerinde nano su damlacıkları oluşturup, denge halinde oluşan ıslatma açısı ölçümleri yapıldı. Literatürde işlem yükünü azaltmak için sıklıkla uygulanan, katı yüzey termal titreşimlerinin ıslatmaya olan etkisinin ihmal edilmesi ve modellenmemesinin ıslatma açısına olan etkisi incelendi. Katı moleküllerin termal titreşimlerinin ıslatma modellenen ıslatma fiziğine baskın bir etkisi olduğu görüldü. Geçtiğimiz yıllarda doğa taklidi olarak bilinen çalışma çevreleri tarafından hayata geçirilmeye çalışılan Lotus yaprağı etkisi temelli yüzey ıslatma kontrolu moleküler seviyede uygulandı. Yüzey üzerinde oluşturulan nano boyutlardaki yüzey yapılarının ıslanma açısını değiştirebildiği gösterildi. Temiz (0 0 1) silika yüzeyinde nano ölçek çizgi gerilimi etkisi altında ölçülen ıslanma açısının deneysel silika ıslanma açısı aralığında olduğu bulundu.Book Part Interface Resistance and Thermal Transport in Nano-Confined Liquids(CRC Press, 2016) Barisik,M.; Beskok,A.The performance and reliability of aforementioned devices strongly depend on the removal of heat either to the ambient or to a coolant. In such cases, phonon transport observed at the interfaces of nanoscale device components and surrounding/confined fluid, or at the interfaces of suspended nanoparticles and fluid medium in nano-fluidic coolants plays a critical role. At such interfaces, heat transfer is interrupted with a temperature jump due to the deficiency in overlap between phonon dispersions of dissimilar materials. Classical theories considering specular or diffuse phonon scattering predict the upper or lower limits of interface thermal resistance (ITR), while a detailed investigation of intermolecular interactions is needed to resolve interface phonon scattering mechanisms. © 2016 by Taylor and Francis Group, LLC.