Browsing by Author "Nair, Rajeev"
Now showing items 1-16 of 16
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Additive and subtractive laser-pulsed nano/micro machining of metal alloys for enhanced material properties, and numerical validation
Bashir, Mahmood Al (Wichita State University, 2020-05)This research focuses on two different aspects of laser machining process, namely additive and subtractive laser micromachining, for inherent improvements to metallic surfaces. In both the processes, material surfaces are ... -
Additive manufacturing of functionally-graded copper/aluminum wick structures by hot-pressing for enhanced thermal performance
Kumaran, Surendhar (Wichita State University, 2022-05)Two-phase passive cooling systems such as heat pipes and vapor chambers (also known as flat heat pipes) are widely used for its reliable high heat flux cooling capacity and its ability to transfer heat over large distances ... -
Analysis of laser cutting of 1.2 MM thick austenitic stainless steel
Atayo, Asonganyi; Al Bashir, Mahmood; Rahman, Muhammad M.; Nair, Rajeev (American Society of Mechanical Engineers (ASME), 2021-02-16)Stainless steel 304 is one of the most commonly used steel types for corrosion resistance applications, but higher melting point is a limitation in industries from a manufacturing point of view. The non-conventional and ... -
Design and finite element analysis of coronary bifurcation stents
Thejeswini, Ujwala (Wichita State University, 2017-05) -
Effects of aluminum evaporator and 7 mm copper condenser coils on a 60,000 btu input packaged refrigeration system
Khan, Mehraz (Wichita State University, 2019-12)The purpose of this study was to determine the effect of aluminum evaporator coils and 7 mm copper condenser coils on a 60,000 Btu refrigeration unit. The development of this unit is due to a VAVE (value analysis and value ... -
Effects of graphene oxide thin films and nanocomposite coatings on flame retardancy and thermal stability of aircraft composites: a comparative study
Uddin, M. Nizam; Le, Louie N.; Nair, Rajeev; Asmatulu, Ramazan (ASME, 2019-03-11)A polymer matrix system of thermoset fiber-reinforced composites helps protect its high modulus and strength fibers from an adverse environment and transfers the load to the reinforced fibers. However, when subjected to a ... -
Effects of laser interface sintering on monolayer copper micro-particles using a carbon dioxide pulsed laser system
Sit, Krishna K. (Wichita State University, 2018-12)Manufacturing of complex and intricate structures using the laser sintering process are in great demand for various applications such as thermal management, light weight structures, filtration, biomedical systems, and ... -
Femtosecond Laser Nano Texturing of Drug-Eluting Stents
Bashir, Mahmood Al (Wichita State University, 2017-03-07)Stents have been used for over a decade to treat coronary arteries affected by stenosis, a state in which the arteries are narrowed by the deposition of plaque. However, studies have shown that a few years after placement ... -
Femtosecond laser Nanotexturing of drug-eluting stents
Bashir, Mahmood Al (Wichita State University, 2017-04-28)Stents have been used for over a decade to treat coronary arteries affected by stenosis, a state where the arteries are narrowed by the deposition of plaque. But studies have found restenosis can hinder its purpose. ... -
Heating performance impact on a mechanical packaged heat pump using all aluminum indoor heat exchanger and reduced copper outdoor heat exchanger
Qidwai, Zehdan Ur Rehman (Wichita State University, 2021-07)The core objective of this study was to analyze the effect of aluminum tube with an improved fin design in a mechanical package heat pump, determine the efficiency of the heat pump, and to take a pragmatic look at the ... -
Hot-press manufacturing of aluminum based multi-layered wick structures for enhanced thermal performance
Kumaran, Surendhar (Wichita State University, 2022-04-29)INTRODUCTION: Two phase passive heat transfer devices such as vapor chambers are used in modern miniaturized electronic devices and state-of-the-art CubeSat systems. These vapor chambers consist of three base components ... -
Improving fluid retention properties of 316L stainless steel using nanosecond pulsed laser surface texturing
Al Bashir, Mahmood; Nair, Rajeev; Sanchez, Martina M.; Mahapatro, Anil (Laser Institute of America, 2020-11)stainless steel has been used as a successful biomaterial for decades. In this study, a pulsed nanosecond laser was used to create patterned surfaces of stainless steel coupons to study the effect of patterning on fluid ... -
Nanosecond pulsed laser surface nanotexturing of tantalum: Correlation between diffusion length model and experimental observations
Bashir, Mahmood Al; Nair, Rajeev (Laser Institute of America, 2019-05-01)The diffusion length of surface textured tantalum using AVIA 355® nanosecond laser was correlated with the different laser parameters. The material was cut into 1 × 1 cm 2 coupons and was exposed to the laser beam of various ... -
Nozzle design and finite element/dynamic analysis for reverse pulse-jet system of vertical dust collectors using ABS-PC material
Sathya Prasad, Pranav (Wichita State University, 2019-12)The main purpose of this thesis was to design and analyze a nozzle for reverse pulse-jet system of dust collectors using ABS-PC (Acrylonitrile butadiene styrene-Polycarbonate) material. Acrylonitrile Butadiene Styrene ... -
Numerical study and experimental comparison of laser cutting of 1.2MM thick austenitic stainless-steel using CW Nd: YAG laser
Atayo, Asonganyi; Bashir, Mahmood Al (Wichita State University, 2020-05-01)Stainless steel-304 is the most common steel used for corrosion resistance applications, but higher melting point is a limitation in industrial manufacturing. The non-conventional and subtractive manufacturing technique ... -
Wick structure and system and method of making wick structure
Hwang, Gisuk; Nair, Rajeev (United States Patent and Trademark Office, 2021-07-29)In a method of forming a porous wick structure, a space is filled with particles formed from electrically conductive material such that the particles contact one another at contact points within the space. The particles ...