Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 12 of 12 for “"spreading process"”.
-
Parametric Analysis of Particle Spreading with Discrete Element Method
<p>The spreading of metallic powder on the printing platform is vital in most additive manufacturing methods, including direct laser sintering. Several processing parameters such as particle size, inter-particle friction, blade speed, and blade gap size affect the spreading process and, therefore, …
-
On the development of new PolyArylEtherKetone bulk solids for Powder Bed Fusion
… (AM) is an established manufacturing process where fine powdered materials are consolidated by an energy source to form polymeric parts without the need for moulds or tooling. A requirement of the process is a fine powder feedstock material of suitable particle size with flow and …
-
Effects of the polymeric binder system in slurry-based three dimensional printing of ceramics
… primitive have been developed. Impact-related spreading of the printed binder droplets has been found to play little or no role on the primitive structure. Two dominant factors controlling primitive width were however identified. The first is wetting-induced spreading of the printed binder …
-
An interferometric study of spreading liquid films
… flows depending on the scale and speed of the spreading process. In this research, a number of benchmark problems involving moving contact lines of viscous Newtonian and non-Newtonian polymeric fluids have been studied using non-invasive optical techniques. A detailed study of viscous Newtonian …
-
Characterization and recyclability of 304L stainless steel powder for use in the selective laser melting process
… files. Laser Powder-Bed Fusion (L-PBF) is a process among the powder-bed fusion techniques that utilizes a laser to consolidate particles into a material with little porosity. During the L-PBF process, the large energy input from the laser causes the production of ejecta in the form of laser …
-
Molten drop deposition and the dynamics of the molten contact line
… varticular interest are molten drop deposition processes in which the drops arrest by solidification before they reach an equilibrium configuration on the solid. Central to this spreading process is the molten dynamic contact line problem, which involves the relationship between the speed of the …
-
Chaotic diffusion in nonlinear Hamiltonian systems
… couplings. The fundamental observation is the spreading of energy for localized initial conditions. Methods of quantifying this spreading behavior are presented, including a new quantity called excitation time. This new quantity allows for a more precise analysis of the spreading than …
-
Control of stochastically interacting systems on networks
… essential features - (i) they are stochastic processes, (ii) they are made up several individual components connected through a network, and (iii) the connected components influence one another through local interactions. This thesis presents analysis and control of three representative …
-
Algorithms on graph-structured data with imperfect information
… Jordan center (GJC), to estimate the source of a spreading process on a DAG based on noisy and incomplete observations. This problem is motivated by contamination diffusion in a food supply chain. For this setting, identifying the source correctly and efficiently as well as inferring states of …
-
Droplet-based Two-phase Thermal Management
… is based on several important fundamental processes, such as droplet evaporation, droplet impact on heated surfaces, and molten droplet impact. In this dissertation, four research projects are completed to explore the insights of these fundamental processes. For droplet evaporation, I …
-
Mathematical frameworks for quantitative network analysis
… illustrate their correlation with stochastic SIR-processes on real world networks. The second part deals with the topology of the intersection nerve for a bi-secondary structure, and its singular homology. A bi-secondary structure R, is a combinatorial object that can be viewed as a collection of …
-
Performance-Based Coastal Engineering Framework
… on the spatial and temporal evolution of dynamic processes in coastal settings using residential structural portfolios and housing as a focal point. Moreover, to expose potential disparities in the impact of coastal hazards to different sectors of the community in the short- and long-term, a …