Browsing by Subject "Mechanical and Manufacturing Engineering, Ph.D."
Now showing items 1-20 of 87
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A biomechanical analysis of the trunk and spine during paediatric cerebral palsy gait
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2017)Movement pathologies in the lower limbs of children with cerebral palsy are well established in the literature. However, movement pathologies of the upper body, in particular the trunk, are less well defined. Mechanical ... -
A new technique for vortex methods in computational fluid dynamics
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2002)The random vortex method is a Lagrangian technique which involves solving the stream function-vorticity formulation of the Navier-Stokes equations. Discrete vortex particles, which are created at the surface to satisfy ... -
A study of heat transfer in forced convective drying with the application of laser-induced fluorescence thermometry
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2016)Industrial drying is a highly energy-intensive process accounting for up to 25% of energy consumption in some developed countries. While there is a wide range of literature on the topic of drying, the majority of studies ... -
A study of the heat transfer processes and related flows of a synthetic jet impinging perpendicular to a heated surface
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2011)To maintain the development of modern technology and its thermally intensive processes, versatile methods of enhancing localised heat transfer are continually required. This need has resulted in an on-going drive to achieve ... -
A study of the role of oil additives in the failure of ball bearings
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2000)This thesis examines the influence that extreme pressure oil additives have in the failure of ball bearings. Additives are commonly used in lubricating oils to improve their properties. In recent years some sections of ... -
A validated computational fluid dynamics methodology for characterisation of fluid flow and heat transfer in unsteady jets
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2016)To improve reliability and avoid premature failure in electronic devices, more effective techniques must be used to dissipate the heat generated by devices. Thermal simulations can enable engineers to investigate and verify ... -
A validated shape optimization approach for maximizing the convective heat transfer from generic heat sink geometries
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2016)Improving the effectiveness of heat transfer devices is one of the most challenging and determinant processes for industrial situations involving energy transformation. Thermal simulations can enable engineers to try and ... -
Acceleration of engineering and scientific applications using trivial operand processing
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2010)A vast array of scientific and engineering problems require the solution of linear systems of equations of the form A* x = y , where A is the coefficient matrix of the system and y is a vector of unknowns and jc is a vector ... -
Active fluidic control of a cylinder in a cross-flow using synthetic jet actuation
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2016)The objective of this body of work is to establish the effectiveness of a simple synthetic jet actuator in modifying the drag forces experienced by a cylinder in a cross flow. This is achieved through the production of a ... -
Adaptation of growing bone to altered mechanical load : morphological change, structural strength and gene expression
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2004)Osteoporosis, a condition characterised by a loss of bone mass, is of increasing clinical interest in an aging population. Bone formation and growth are controlled by genetic, hormonal and biomechanical factors. This ... -
An asperity deformation model for the sliding cylinder problem : theoretical and experimental investigations
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2000)Statistical analysis shows that the main reason for the failure of machines is not breakage but wear of the moving parts resulting from rubbing stress. Although the laws of friction are fairly well substantiated, there are ... -
An experimental and 3D finite element analysis of a form rolling process
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2005)This thesis investigates a cold forming process called Form Rolling. Form Rolling is an innovative method of producing near-net shape parts, which is being implemented in particular by fastener manufacturers. In this study, ... -
An experimental and numerical investigation into the machining of Inconel 718 using coated cemented carbide cutting tools
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2000)The nickel-base superalloy Inconel 718, a tough material capable of maintaining its strength at high temperatures and resisting corrosion in various environments, can be classified as a "difficult to machine" material. Yet ... -
An improved framework for the inverse analysis of skeletal muscle tissue in-vivo
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2012)This thesis focusses on the development of an experimental and computational framework for the non-invasive analysis of the passive mechanical properties of living human skeletal muscle tissue. This is relevant to many ... -
An investigation of joint tissue derived stem cells for articular cartilage tissue engineering
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2011)Tissue engineering has emerged as a promising approach to repair damaged articular cartilage. The associated drawbacks with the isolation and expansion of chondrocytes from autologous tissue have prompted significant ... -
An optimized surface topography for calcium phosphate bone tissue engineering scaffolds
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2016)Improved scaffold/host integration and avoiding core necrosis are important and active goals in tissue engineering. Alternatives to bone tissue grafting that are highly bioactive and inexpensive to manufacture are clinical ... -
Analysis of the elastic and inelastic behaviour of healthy and diseased arterial tissue
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2012)Mechanical factors play a key role in determining the success of clinical procedures such as balloon angioplasty and stenting that aim to increase lumen size in atherosclerotic lesions. Finite element modelling is commonly ... -
Boundary element methods for the prediction of aircraft noise shielding in flight
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2011)Aircraft noise emissions may be significantly reduced by positioning the aeroengines above the wings or fuselage so as to utilize the shielding effect of the airframe. Computational tools are likely to play a key role in ... -
Bubble growth dynamics in nucleate pool boiling with liquid subcooling effects
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2014)Heat transfer in nucleate pool boiling has been characterized by very high dissipated heat fluxes whilst requiring low driving temperature differences. The rate of bubble growth and the subsequent bubble motion has a ... -
Bubble growth dynamics including gravitational and electric field effects
(Trinity College (Dublin, Ireland). Department of Mechanical and Manufacturing Engineering, 2011)In the present work the hydrodynamics of adiabatic gas bubble growth from a submerged orifice is investigated with the view of elucidating the interdependence of the bubble shape and the pressure field during growth and ...
