Browsing by Author "Arık, Mehmet"
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Discrete phase analysis of self heating particles over an immersion liquid cooled high power blue light-emitting diode with suspended phosphor particles
Cengiz, Ceren; Muslu, Ahmet Mete; Azarifar, Mohammad; Arık, Mehmet; Dogruoz, B. (ASME, 2022-10)In recent years, the interaction of unrestricted particles with dispersed multiphase flows has been linked to a number of important engineering applications. Among these applications, the novel idea of immersion-cooled ... -
Dynamic opto-electro-thermal characterization of solid state lighting devices: measuring the power conversion efficiency at high current densities
Azarifar, Mohammad; Cengiz, Ceren; Arık, Mehmet (IOP Publishing, 2022-09-22)Solid state lighting devices with high power densities require accurate characterization, as the rise of chip temperature impacts its optical, electrical, and lifetime characteristics. A detailed experimental study is ... -
Effect of actuator deflection on heat transfer for low and high frequency synthetic jets
Ikhlaq, Muhammad; Ghaffari, Omidreza; Arık, Mehmet (IEEE, 2014)Synthetic jets are being investigated over the last four decades. Researchers have been interested in its unique applications for a wide range of flow control to thermal management of electronics applications. Synthetic ... -
Effect of direct liquid cooling on light emitting diode local hot spots: Natural convection immersion cooling
Tamdoğan, Enes; Arık, Mehmet (Begell House Inc., 2014)The increased popularity of solid state systems with the technological developments have led them to be a favorable choice for many lighting applications besides electronics. However, the development of denser high lumen ... -
Effect of direct liquid cooling on the light emitting diode local hot spots? A computational and experimental study
Tamdoğan, Enes; Arık, Mehmet (Begell House Inc, 2014)The increased popularity of solid state systems with the technological developments have led them to be a favorable choice for many lighting applications besides electronics. However, the development of denser high lumen ... -
Effect of optical design on the thermal management for the smart tv led backlight systems
Karslı, K.; Arık, Mehmet (IEEE, 2014)Due to recent advances in electronics, lighting and communication technologies, SMART Televisions (TV) have become more affordable, and are rapidly eplacing old-fashioned LCD (liquid crystal display) TV technologies. These ... -
Effect of phase change materials on the optical path of LEDs for opto-thermal enhancement
Azarifar, M.; Arık, Mehmet; Xie, B.; Luo, X. (IEEE, 2023-05)A novel concept based on the encapsulation of transparent phase change materials (PCMs) into the optical packaging structure of light-emitting diodes (LEDs) is presented in this article. The concept was initiated by ... -
Effect of polymer coating on vapor condensation heat transfer
Budaklı, M.; Salem, T. K.; Arık, Mehmet; Donmez, B.; Menceloglu, Y. (ASME, 2020-04-01)Condensation heat transfer coefficients (HTCs) are rather low compared to thin film evaporation. Therefore, it can be a limiting factor for designing heat transfer equipment. In this work, heat transfer characteristics of ... -
Energy efficiency analysis and improving performance of light emitting diodes
Kahvecioğlu, Halil İbrahim (2018-12)Energy efficiency of light sources continually increases as the technology advance. Traditional light sources have inefficiency, large sizes, short life times and poisonous mercury vapor. On the other hand, the improvements ... -
Enhanced thermal performance of high flux led systems with two-phase immersion cooling
Cengiz, Ceren; Muslu, Ahmet Mete; Arık, Mehmet; Doğruöz, B. (IEEE, 2020)Considering significant worldwide use of electricity 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 ... -
An Eulerian multiphase frost model based on heat transfer measurements
Saygın, Alper; Başol, Altuğ Melik; Arık, Mehmet (Elsevier, 2023-12-01)In this paper, a laminar numerical model is developed to predict frost formation over a horizontal cold flat surface. An Eulerian-Eulerian multiphase approach is followed to model humid air and ice phases separately. Frost ... -
An experimental and analytical study on the influence of superhydrophobic micro-textured surfaces on liquid wetting phenomena
Salem, Thamer Khalif; Budaklı, M.; Şahan, Oğuz; Arık, Mehmet (Elsevier, 2018-10-20)Controlling dust, particle, gas or liquid attachment or motion over the surfaces is attracting many researchers to reduce losses or reach mission-specific goals. Therefore, researchers have been developing novel surfaces ... -
An experimental and computational investigation of a thin piezofan cooler
Dogruoz, M. B.; Arık, Mehmet; Parsa, Shadi (IEEE, 2017)Recent trends in electronic cooling systems are targeted towards a reduction in size, therefore small form factor/miniature cooling devices are of interest to various applications. Among these devices are piezoelectric ... -
An experimental and computational study on efficiency of white LED packages with a thermocaloric approach
Yuruker, S. U.; Tamdogan, Enes; Arık, Mehmet (IEEE, 2017)Thermal management of light-emitting diode (LED) chips is crucial for light extraction and lifetime. It is well known that the light output of an LED decreases with the elevated temperatures. For higher light extraction, ... -
An experimental and numerical investigation of immersion cooled blue led combined with yag:ce phosphor for thermal, electrical and optical performance
At the new age of illumination, light emitting diodes (LEDs) have been proven to be the most efficient alternative to conventional light sources. Yet, in comparison to the other lighting systems, LEDs can withstand a lower ... -
An experimental and theoretical analysis of vapor-to-liquid phase change on microstructured surfaces
Budakli, M.; Salem, T. K.; Arık, Mehmet (Elsevier, 2020-09)In this work, an experimental and a theoretical study was carried out on condensation heat transfer on vertically aligned bare unstructured, micro V-grooved and square-grooved copper substrates. During the experiments, ... -
An experimental investigation into frost accumulation over vertical finned and unfinned surfaces during impinging air flow
Öksüz, Enes Abdülhakim; Saygın, Alper; Başol, Altuğ Melik; Budaklı, M.; Arık, Mehmet (ASME, 2020)Frost formation on evaporators negatively affects the cooling performance of refrigerators. It increases the thermal resistance between the refrigerant and air leading to a reduction in the system cooling capacity. In this ... -
An experimental research on the effects of frost formation on different environmental conditions and surface configurations
Frost formation on finned surfaces is observed on heat exchangers in cooling systems such as refrigerators and air conditioners. Accumulated frost on finned surfaces blocks the air flow in between fins and reduces the ... -
An experimental study of impinging synthetic jets for heat transfer augmentation
Ghaffari, Omidreza; Ikhlaq, Muhammad; Arık, Mehmet (World Scientific Publishing Co, 2015-07)According to recent trends in the field of miniature electronics, the need for compact cooling solutions compatible with very thin profiles and small footprint areas is inevitable. Impinging synthetic jets are recognized ... -
An experimental study on the frost formation over a flat plate: Effect of frosting on heat transfer
Saygın, Alper; Başol, Altuğ Melik; Arık, Mehmet (Elsevier, 2023-06-01)Frost accumulation on cooled surfaces generates thermal barrier between the surface and air. Apart from the frost layer thickness, the thermal properties of the frost also affect its heat transfer characteristics. In this ...
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