Browsing Mechanical and Mechatronics Engineering by Title
Now showing items 821-840 of 1493
-
Investigation of Conditional Source-Term Estimation Approach for Turbulent Partially Premixed Combustion Modelling
(University of Waterloo, 2015-07-29)Conditional Source-term Estimation (CSE) is a closure technique for modelling turbulent combustion phenomena. CSE uses the Conditional Moment Closure (CMC) hypothesis for closing chemical source terms: conditionally averaged ... -
Investigation of Conditional Source-term Estimation Approach to Modelling MILD Combustion
(University of Waterloo, 2016-07-27)Conditional Source-term Estimation (CSE) is a turbulent combustion model which uses conditional averages to provide closure for the mean chemical source term and is based on the same ideas as the Conditional Moment Closure ... -
Investigation of Consumer Grade EEG as a Fall Risk Assessment Tool
(University of Waterloo, 2017-08-29)Fall prevention for geriatric populations is a growing concern among clinicians and researchers due to severe risk of morbidity and loss of independence. Emerging evidence has demonstrated that cognitive workload while ... -
Investigation of Differential Diffusion Effects in Turbulent Hydrogen Jet Flame using Conditional Moment Closure Method
(University of Waterloo, 2014-08-26)The effects of differential diffusion in the numerical modelling of a turbulent non-premixed hydrogen-air jet flame using a Conditional Moment Closure (CMC) method are investigated. The CMC calculations, which are coupled ... -
Investigation of Direct Injection Fuel Sprays in High Velocity Air Flows
(University of Waterloo, 2013-10-24)The study of single-plume sprays into cross-flowing air is found extensively in literature, however, with the continued development of the Spark Ignition Direct Injection (SIDI) engine, the behaviour of multi-plume sprays ... -
Investigation of effect of temperature and forming speed on the formability of AA3003 Brazing Sheets
(University of Waterloo, 2016-07-08)The present work investigates the effect of forming temperature and forming speed on the formability of AA3003 aluminum alloy brazing sheet in three temper conditions (O, H22 and H24) and two different thicknesses (0.2 and ... -
Investigation of Head and Brain Response in Football Helmet Impacts using a Finite Element Model of the Head and Neck with Active Muscle
(University of Waterloo, 2019-06-20)Among high school and college athletes, ∼50% of American football players report a concussion each year, and at least 30% of players sustain more than one concussion per year, which may be reduced in part through improvements ... -
Investigation of Liquid Metal Embrittlement in Advanced High Strength Steels
(University of Waterloo, 2020-04-17)Third-generation advanced high strength steels (AHSS) are typically given a zinc coating that provides excellent resistance to corrosion. During the resistance spot welding (RSW) process, the melted zinc coating enables ... -
Investigation of Liquid-Metal-Embrittlement Crack-path: Role of Grain Boundaries and Responsible Mechanism
(University of Waterloo, 2020-07-24)Liquid metal embrittlement (LME) has been reported in many structural materials, including steel, aluminum, nickel during hot working processes e.g. welding, brazing, heattreatment, leading to abrupt failure. In many of ... -
An Investigation of Manganese Macro segregation in Cast Dual Phase Steels using Micro X-ray Fluorescence Spectroscopy
(University of Waterloo, 2017-10-18)Advanced High Strength Steels with a high manganese content offer an exceptional balance of strength and ductility. However, the occurrence of segregation in these steels, particularly at the centerline, leads to quality ... -
Investigation of Mixing Models and Finite Volume Conditional Moment Closure Applied to Autoignition of Hydrogen Jets
(University of Waterloo, 2012-03-09)In the present work, the processes of steady combustion and autoignition of hydrogen are investigated using the Conditional Moment Closure (CMC) model with a Reynolds Averaged Navier-Stokes (RANS) Computational Fluid ... -
Investigation of Plating Process Variability and Mechanism for Oxide Disruption in a Ni-Modified Fluxless Brazing Process for Aluminum Alloys
(University of Waterloo, 2015-01-15)The effect of surface oxides and the presence of ternary constituents were examined using differential scanning calorimetry (DSC) along with SEM, EDX, and TEM studies to quantitatively analyze the role of nickel in its use ... -
Investigation of Primary Blast Injury and Protection using Sagittal and Transverse Finite Element Head Models
(University of Waterloo, 2015-01-14)The prevalence of blast related mild traumatic brain injury (mTBI) in recent military conflicts, attributed in part to an increased exposure to improvised explosive devices (IEDs), requires further understanding to develop ... -
Investigation of Resistance Spot Weld Failure in Tailored Hot Stamped Assemblies
(University of Waterloo, 2018-01-23)This thesis presents the results from the mechanical characterization of resistance spot welds within hot stamped USIBOR® 1500-AS steel sheet (1.2 and 1.6 mm thickness) with tailored properties. Three parent metal conditions, ... -
Investigation of the Interaction of Particulate Matter with the Gas Diffusion Layer
(University of Waterloo, 2017-06-14)Rapid global industrialization has resulted in an unprecedented level of energy consumption. Transportation comprises a significant portion of the demand for energy, and special attention has recently been paid to green ... -
Investigation of the scalar variance and scalar dissipation rate in URANS and LES
(University of Waterloo, 2011-02-22)Large-eddy simulation (LES) and unsteady Reynolds-averaged Navier-Stokes (URANS) calculations have been performed to investigate the effects of different mathematical models for scalar variance and its dissipation rate as ... -
An Investigation of the Soldering and Brazing Behaviour of Mg-Mg Joints using Sn, Zn and Mg containing Filler Metals
(University of Waterloo, 2012-05-10)In order to evaluate the feasibility of forming Pure Mg – Pure Mg and Mg Alloy – Mg Alloy joints using soldering and brazing, four filler metals (Sn, Sn-9Zn, Sn-9Zn+X wt%Mg and Mg:Zn:X(Sn-9Zn)) were used at peak heating ... -
Investigation of the use of Dynamic Resistance in Adaptive Welding and Statistical Relation to Quality
(University of Waterloo, 2019-09-19)The pursuit of real time quality detection of a resistance spot weld (RSW) in the automotive industry has progressed alongside technology. With the capability of modern controllers to collect real-time data from the welding ... -
Investigation of Thorax Response and Potential for Injury in Side Impacts Using Integrated Detailed Human and Vehicle Finite-Element Models
(University of Waterloo, 2018-08-14)Car accidents are amongst the most common causes of fatalities for a younger population in developed countries and world-wide. While research using Anthropometric Test Devices (ATDs) has led to improvements in frontal ... -
Investigation of Transient Gas Dynamics from Laser-Energized Nanoparticles
(University of Waterloo, 2013-08-21)Soot is formed whenever the combustion of hydrocarbon fuels is incomplete. Since soot particles are very small, they can be inhaled and cause severe health problems, such as pulmonary diseases. They can also cause environmental ...