Browsing Mechanical Engineering by OzU Authors "Arık, Mehmet"
Now showing items 41-60 of 80
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Impact of electronics over localized hot spots in multi-chip white LED light engines
Muslu, Ahmet Mete; Arık, Mehmet (IEEE, 2019)In recent years, demand towards high power white LEDs has risen significantly covering a wide range of application areas. While many industries prefer more light extraction using less number of LED chips on their luminaires, ... -
Impact of functional nanofluid coolant on radiator performance
Salem, T. K.; Nazzal, I. T.; Arık, Mehmet; Budakli, M. (ASME, 2019-08)While a number of liquids are preferred in many heating and cooling applications, their thermal capacity can be a limiting factor in many thermal systems. Therefore, a series of methods such as use of mixtures of two or ... -
Impact of junction temperature over forward voltage drop for red, blue and green high power light emitting diode chips
Muslu, Ahmet Mete; Özlük, Burak; Tamdoğan, Enes; Arık, Mehmet (IEEE, 2017)Commercially available light emitting diodes (LEDs) that have high efficiencies and long lifetime are offered in advanced packaging technologies. Many cooling systems were developed for current LED systems that enable a ... -
Impact of orifice location on the mechanical response of side and central orifice synthetic jets
Naseem, Mohammad Zohaib; Şendur, Polat; Arık, Mehmet (2018-07-24)Synthetic jets have been at the focus of a number applications including flow control and thermal management of microelectronics due to their unique characteristics of transferring linear momentum through a flow structure ... -
Impact of orifice size over mechanical, flow and thermal performances of synthetic jets
Işıl, Onuralp; Yücesan, Boğaç; Arık, Mehmet (IEEE, 2018-07-24)Recent electronic systems require more aggressive cooling solutions due to their high functionality, densely packaged components and localized heating compared to low functionality systems in the last decade. Synthetic ... -
Impact of oxidation on pool boiling heat transfer performance over flat plates exposed to extended operating conditions
Emir, Tolga; Budaklı, Mete; Arık, Mehmet (IEEE, 2023)Phase change heat transfer is utilized in a number of high heat flux applications. In order to ensure reliable functionality at moderate temperatures, one has to guarantee a stable long-term operation. In this experimental ... -
In memoriam Prof. Avram Bar-Cohen
Hodes, M. S.; Iyengar, M.; Arık, Mehmet; Kim, K. J.; Spector, M.; Bhavnani, S. H.; Joshi, Y. K.; Mahajan, R. V.; Ramakrishna, K. (IEEE, 2021-08)The outpouring of emotion and appreciation for Prof. Avram (Avi) Bar-Cohen from his students and colleagues in the academic, industrial, and government communities in Heat Transfer and Electronics Packaging is a testament ... -
In memoriam Prof. Avram Bar-Cohen
Hodes, M. S.; Kim, K. J.; Arık, Mehmet; Mahajan, R. V.; Ramakrishna, K. (IEEE, 2021-11)It has been a little over a year since the passing of Prof. Avram, Avi as he is popularly known, Bar-Cohen. Eulogies from his students and colleagues in the academic, industrial, and government communities in Heat Transfer ... -
An investigation into flow and heat transfer for a slot impinging synthetic jet
Ghaffari, Omidreza; Solovitz, S. A.; Arık, Mehmet (Elsevier, 2016-09)According to the latest trends in miniature consumer and military electronics, there is a need for compact cooling solutions to meet performance requirements at compact volumes. Successful technology must feature a thin ... -
An investigation into flow and heat transfer of an ultrasonic micro-blower device for electronics cooling applications
Ghaffari, Omidreza; Solovitz, S. A.; Ikhlaq, Muhammad; Arık, Mehmet (Elsevier, 2016-05-08)As compact electronics increase in functionality, new electronics cooling approaches must be more effective, and they must be lower in form factor. In this paper, we investigated the cooling performance of a miniature ... -
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. ... -
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 ... -
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 ... -
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 ... -
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 ...
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