Mechanical Engineering: Recent submissions
Now showing items 301-320 of 465
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3-D extension of chemical mechanical polishing for nano-structuring applications on alternative technologies
(The Electrochemical Society, 2016)In this study we tune the chemical mechanical polishing process to a 3-D level to generate controlled nanostructures on functional metallic surfaces such as titanium implants and steel based heating elements. The chemical ... -
Thermal enhancement of an LED light engine for automotive exterior lighting with advanced heat spreader technology
(ASME, 2016)In recent years, light emitting diodes (LEDs) have become an attractive technology for general and automotive illumination systems. LEDs have been preferable for automobile lighting due to its numerous advantages such as ... -
The effect of nanoparticle type and nanoparticle mass fraction on heat transfer enhancement in pool boiling
(Elsevier, 2017-06)Determining the heat transfer performance with nanofluids is of cardinal importance in the utilization of nanofluids in thermal systems. This study presents an experimental investigation on nucleate pool boiling heat ... -
Characterization and antibacterial properties of nanoboron powders and nanoboron powder coated textiles
(Elsevier, 2017-02)The antibacterial properties of boron-containing compounds are well known although there are limited studies available on the pure boron nanoparticles. In this paper, nanoboron particles are characterized in terms of their ... -
An experimental and computational study on efficiency of white LED packages with a thermocaloric approach
(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, ... -
On the decoupling of the improved Boussinesq equation into two uncoupled Camassa-Holm equations
(American Institute of Mathematical Sciences, 2017-06)We rigorously establish that, in the long-wave regime characterized by the assumptions of long wavelength and small amplitude, bidirectional solutions of the improved Boussinesq equation tend to associated solutions of two ... -
Turbulence impact on wind turbines: experimental investigations on a wind turbine model
(IOP Publishing, 2016)Experimental investigations have been conducted by exposing an efficient wind turbine model to different turbulence levels in a wind tunnel. Nearly isotropic turbulence is generated by using two static squared grids: fine ... -
Nano-boron as an antibacterial agent for functionalized textiles
(Cambridge University Press, 2015-01)The antibacterial properties of boron-containing compounds are well known although there are limited studies available on the pure boron nanoparticles. In this study boron nano-particles were characterized in terms of their ... -
Flow and heat transfer study of an impinging piezoelectric fan over a vertical surface
(ASME, 2016)Piezoelectric fans are low-form-factor cooling devices, which have gained recent attention for electronics cooling. These devices feature a vibrating blade, which sheds vortices from its tip during its motion. The performance ... -
Effect of purity levels on the high-temperature deformation characteristics of severely deformed titanium
(Springer International Publishing, 2017)In the present investigation, high-temperature compression tests were conducted at strain rates of 0.001 to 0.1 s−1 and at temperatures of 873 K to 1173 K (600 °C to 900 °C) in order to study the hot deformation characteristics ... -
Investigation of power distribution on an axial fan
(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 ... -
Discrete-time integral sliding mode control of a smart joint for minimally invasive surgeries
(IEEE, 2016)In this work, a shape memory alloy(SMA) actuator based joint (smart joint) is controlled using a discrete-time integral sliding mode (DISM) control to guide the motion of an active catheter. Controller is designed on the ... -
Design and modeling of a parallel robot for ultrasound guided percutaneous needle interventions
(IEEE, 2015)Necessity of precise positioning in percutaneous needle operations enables robotic systems to take part in medical procedures. Researches that have been done until today showed robotic systems increase the accuracy of ... -
Application of chemical mechanical polishing process on titanium based implants
(Elsevier, 2016-11-01)Modification of the implantable biomaterial surfaces is known to improve the biocompatibility of metallic implants. Particularly, treatments such as etching, sand-blasting or laser treatment are commonly studied to understand ... -
On the mechanical behavior of cold deformed aluminum 7075 alloy at elevated temperatures
(Elsevier, 2016-07-18)In the present study, elevated temperature deformation behavior and microstructural evolution of 7075 aluminum alloy at annealed and cold rolled conditions were examined. Isothermal uniaxial tensile tests at a temperature ... -
Enhancing local absorption within a gold nano-sphere on a dielectric surface under an AFM probe
(Elsevier, 2016-07)This study considers enhancing localized absorption by a gold nanoparticle (NP) placed over a substrate where an atomic force microscope (AFM) tip is in close proximity of the particle. The gold NP and AFM tip are interacting ... -
An investigation into flow and heat transfer for a slot impinging synthetic jet
(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
(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 evaluation of energy efficiency measures in a Turkish campus building for thermal comfort and economic risk
(International Building Performance Simulation Association, 2015)As new and retrofitted Turkish buildings adopt stateof-the-art energy efficiency measures, hidden risks associated with compromised thermal comfort and disappointing returns on investment could go unnoticed unless a building ... -
Near to far-field thermal emission by nanoparticles on a substrate: Evaluation of effective medium theory
(The Optical Society, 2014)We study the near to far-field thermal emission of a thin SiC film with/without nanospheres placed upon it. We show that Effective Medium Theorem produces questionable results when approximating emission and absorption ...
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