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.
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Showing 1 to 9 of 9 for “"Random packing"”.
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Mechanical behavior of closed-cell and hollow-sphere metallic foams
… of defects into the model, including random packing, variations in bond size, and variations in sphere relative thickness. Finally, the performance of hollow-sphere foams is compared to other low-density engineering materials on a structural basis; hollow-sphere foams offer a …
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Assessment and improvement of hydraulic disinfection efficiency of a live small drinking water system in South Africa
… tank modifications of an inlet manifold and random packing material (RPM) on live systems. A case study was conducted on a small waterworks in the rural town of Rosetta, KwaZulu-Natal, South Africa, in collaboration with Umgeni Water. Physical tracer tests were conducted on a 10,000L …
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Transition between Flow Regimes in Porous Media Using Magnetic Resonance Velocimetry: From Laminar to Turbulent
… turbulent flow regimes, was examined in sphere packings. Further understanding of the fundamental fluid dynamics was derived based on the pore-scale flow visualisation using magnetic resonance velocimetry (MRV). Spiral imaging was selected as the ultrafast imaging protocol to probe the transient …
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Throughput and complexity tradeoffs in the multi-antenna downlink
… of the multi-user multi-antenna channel as a random packing of the unit sphere. As such, we provide refined estimates on the content of spherical caps so that they can be applied as a model for interference. We then employ recent developments in the area of random geometric graph theory to …
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Experimental and computational analysis of random cylinder packings with applications
Random cylinder packings are prevalent in chemical engineering applications and they can serve as prototype models of fibrous materials and/or other particulate materials. In this research, comprehensive studies on cylinder packings were carried out by computer simulations and by experiments. The …
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Multiscale modeling in granular flow
… can also successfully track microscopic packing signatures, making it one of the first models of a flowing random packing. To extend to situations other than drainage ultimately requires a treatment of material properties, such as stress and strain-rate, but these quantities are difficult …
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Mechanics of Liquid Transport and Swelling in Porous Media
… in porous cellulose foam and in a dense random packing of glass spheres are studied in this thesis. Specifically, the capillary and diffusion mechanisms are investigated by critical experiments, and appropriate theoretical models are developed for both porous media. Finally, a coupled …
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Micromechanical study of two-phase flow during air sparging
… extract pore structure from a computer simulated packing of spheres. The second methodology is to generate an equivalent 3D pore network of porous media, in which the centers of voids are located in a regular lattice with constant pore center distance. Both algorithms were validated by comparing …
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Evaluation of Non-functionalized Single Walled Carbon Nanotubes Composites for Bone Tissue Engineering
… into PLAGA matrix. The microspheres bonded in a random packing manner while maintaining spacing, thus resembling trabeculae of cancellous bone. Addition of 10mg SWCNT led to greater compressive modulus and ultimate compressive strength. Imaging studies revealed that MC3T3-E1 cells adhered, …