Browsing by Author "Arık, Mehmet"
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An investigation into junction temperature of green and blue LEDs
Özlük, Burak (2019-01-04)As more advanced technologies are developed, energy considerations are becoming more serious. This is also true for lighting systems that play a crucial role in worldwide energy consumption consisting of 15% of general ... -
An investigation into mechanical and thermal characteristics of synthetic jet actuators with compact packaging
Işıl, Onuralp (2021-01-05)Cooling systems have been one of the most important elements in packaged electronics due to their inseparable relation with performance. Processors, light emitting diodes (LED), servers, advanced communication systems, ... -
An investigation into momentum and temperature fields of a meso-scale slot synthetic jet for a small jet-to-surface spacing
Ghaffari, Omidreza; Doğruöz, M. B.; Arık, Mehmet (Begell House Inc., 2014)Impinging synthetic jets have been identified as a promising technology for cooling miniature structures. Recognizing their thermal performance on the target surface requires a fundamental understanding of the momentum ... -
An investigation into momentum and temperature fields of a meso-scale synthetic jet
Ghaffari, Omidreza; Doğruöz, M. B.; Arık, Mehmet (IEEE, 2014)Thermal management has become a critical part of advanced micro and nano electronics systems due to high heat transfer rates. More constraints such as compactness, small footprint area, lightweight, high reliability, ... -
An investigation into performance characteristics of an axial flow Fan using CFD for electronic devices
Hashim, Hafiz Muhammad; Doğruöz, M. B.; Arık, Mehmet; Parlak, M. (ASME, 2015)Rotating fans are widely utilized in thermal management applications and their accurate characterization has recently become even a more critical issue for thermofluids engineers. The present study investigates the ... -
An investigation into the optothermal behavior of a high power red light emitting diode: impact of an optical path
Monochromatic light emitting diodes (LEDs) are getting more attention day by day for a very wide range of applications such as general lighting, signage, automotive lighting, display, water purification, and skin imaging. ... -
An investigation into thermal and optical performance of multi-purpose LED automotive exterior lighting systems
Saati Khosroshahi, Ferina (2015-12)Vehicle lighting is important for both security and comfort. In addition, external lighting standards need to be reliable and are subject to international norms for the prevention of accidents. For this reason, automobile ... -
Investigation of combined optical and thermal effects on phosphor converted light-emitting diodes with liquid immersion cooling
Kahvecioğlu, Halil İbrahim; Tamdoğan, E.; Arık, Mehmet (SPIE, 2018)The inclusion of phosphor into a high brightness light-emitting diode (LED) package is a complicated task since LEDs are encapsulated with a phosphor and epoxy mixture to convert blue photons to white light. Moreover, this ... -
An investigation of performance of synthetic jets emanating from circular, elliptical and rectangular nozzles
Işıl, Onuralp; Doğruöz, M. B.; Arık, Mehmet (IEEE, 2018-07-24)Impinging synthetic jets have been considered as a future solution for cooling miniature structures. Synthetic jet performance is sensitive to a number of parameters such as orifice size, orifice shape and nozzle-to-target ... -
Investigation of power distribution on an axial fan
Hashim, Hafiz Muhammad; Yasa, Y.; Dogruoz, M. B.; Arık, Mehmet; Mese, E. (IEEE, 2016)Forced convection cooling systems utilize fans which can be axial or radial, small or large in many different configurations. Efficiency of a fan depends on its electrical and mechanical designs as well as the environmental ... -
Limitations of passive thermal management for a-line solid state lighting technologies
İnan, Muhammed Nasır (2015-01)Energy has been one of the most important problems for the last few decades. Efficient use of energy is as important as efficiency in energy production and transportation. Solid state lighting (SSL) technology may reduce ... -
Machine learning to predict junction temperature based on optical characteristics in solid-state lighting devices: A test on WLEDs
Azarifar, Mohammad; Ocaksönmez, Kerem; Cengiz, Ceren; Aydoğan, Reyhan; Arık, Mehmet (MDPI, 2022-08)While junction temperature control is an indispensable part of having reliable solid-state lighting, there is no direct method to measure its quantity. Among various methods, temperature-sensitive optical parameter-based ... -
Meso-scale cooling devices experimental and numerical heat transfer analysis
Parsa, Shadi Habibi (2017-01)Various thermal management strategies and related technologies are recently developed based on the specific needs, which they are designed to fulfill. Some of these technologies are muffin fans, synthetic jets, and ... -
Natural convection immersion cooling with enhanced optical performance of light-emitting diode systems
Tamdoğan, Enes; Arık, Mehmet (2015-10-15)Electronics driven at high currents may experience local hot spots, which may cause thermal degradation or even catastrophic failures. This common problem occurs at light-emitting diode (LED) chips and it is not easily ... -
A novel approach for identification of thermal and optical characteristics for the active layer of high power photonic devices
Muslu, Ahmet Mete (2019-12)A vast amount of electricity consumption for general lighting, the implementation of energy efficient technologies is highlighted in many platforms with the use of light emitting diodes (LEDs). Because of its environmentally ... -
Numerical and experimental analysis of a heat-pipe-embedded printed circuit board for solid state lighting applications
Salem, Thamer Khalif; Khosroshahi, F. S.; Arık, Mehmet; Hamdan, M. O.; Budakli, M. (Taylor & Francis, 2019-01-02)Thermal management is one of the main issues for electronics cooling especially for tightly packaged PCBs that experience local heat generation. Thus, theoretical and experimental investigations have been conducted to ... -
Numerical and experimental analysis of KSF LED packages in a 65" ultra-thin LED TV
Elibol, Metehan (2019-08-08)Flat panel display technologies have been well developed over the last decade towards high-end products which have slimmer, higher brightness and wider color gamut (WCG) characteristics. These challenges led to a dramatic ... -
A numerical investigation into frost formation under impinging flow conditions
Saygın, Alper; Öksüz, Enes Abdülhakim; Başol, Altuğ Melik; Arık, Mehmet (IEEE, 2021)Frost formation is an undesired phenomenon for a wide range of practical applications as it diminishes amount of heat dissipation from heat transfer regions. In this paper, frost growth process on a vertically suspended ... -
A numerical study of a single unsteady laminar slot jet in a confined structure
Ghaffari, Omidreza; Doğruöz, M. B.; Arık, Mehmet (ASME, 2013)With the inherit advantages of air cooling, jet impingement can produce a factor of two or higher heat transfer than conventional fan flow over bodies. Therefore, impinging jets can solve a number of electronics thermal ... -
On the individual droplet growth modeling and heat transfer analysis in dropwise condensation
Azarifar, Mohammad; Budaklı, M.; Başol, Altuğ Melik; Arık, Mehmet (IEEE, 2021-10)The low convective coefficient at condenser part of spreaders and vapor chambers due to film blanket blocking encourages utilizing dropwise condensation (DWC). Challenges exist in the experimental characterization of DWC, ...
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