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 20 of 995 for “"granular"”.
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Granular Collapses
… research presented in this thesis concerns the granular collapse problem, where a mass of a granular material is allowed to collapse under its own weight and spread out across a base surface. Whilst this collapse process has been studied in the past, there are a number of potentially important …
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Vibrated granular matter
Granular matter is defined as a large collection of particles the size of which is larger than one micron so that Brownian motion is negligible. Its behavior has been studied at least since the days of Charles-Augustin de Coulomb (1736-1806), who originally stated his law of friction for granular …
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Density relaxation of granular matter through Monte Carlo and granular dynamics simulations
Granular materials are the principal ingredients of the industrial complex involved with the handling and processing of bulk solids including pharmaceuticals, chemicals, agricultural and mining materials. Despite the enormous importance of these materials in society, their behavior is not …
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Transport in granular systems
… are many situations in which a continuum view of granular systems does not fully capture the relevant mechanics. In order for engineers to be able to design systems for transporting granular materials, there needs to be an understanding of the mechanics of granular systems and how their …
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Granular Shape Memory Ceramics
… applications. By utilizing easily scalable granular packings of discrete free particles, the transformation can be triggered in bulk without fracture in much the same way. The granular packing material form introduces significant complexity as the internal stress distributions responsible …
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Propiedades acústica del caucho granular
… fino del caucho, que lo convierte en un material granular con la posibilidad de obtener muestras de granulometrías y distribución de tamaño de partículas controladas. El análisis teórico de este material debe, por tanto, asentarse en los conocimientos existentes sobre medios porosos y, por ello, …
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Dynamics of 1d granular column
This dissertation is focused on a discrete element study of the dynamics of a one- dimensional column of inelastic spheres that it subjected to taps by prescribing a half sine wave pulse to supporting floor. Contact interactions obey the Walton-Braun soft-sphere model in which the loading …
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Multiscale modeling in granular flow
Granular materials are common in everyday experience, but have long-resisted a complete theoretical description. Here, we consider the regime of slow, dense granular flow, for which there is no general model, representing a considerable hurdle to industry, where grains and powders must frequently …
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Drying of granular ceramic films
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1991.
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Statistical mechanics of granular systems
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1997.
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Computational modeling of granular materials
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1996.
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Granular Hydrogels for Localized Nanoparticle Delivery
… retention. Building on these insights, granular macroporous hydrogels were selected as the platform for nanoparticle delivery. To enable their fabrication, a new emulsion-based method, termed T-Drop, was developed, offering a flexible and accessible approach for producing microgels with …
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Granular sloshing absorbers for vibration control
… a novel passive damping device, that uses a granular material sloshing in a rotating cylindrical container as the energy sink. Tuning of a granular sloshing absorber is shown to be effective using a laboratory prototype, increasing the inherent damping of the structure by two orders of …
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Energy propagation in jammed granular matter
The systems built from dense granular materials are very important due to their relevance to a number of technological and other fields. However, they are difficult to study in particular due to a lack of accurate continuum description. In this work, studies on these systems are presented using …
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Mining multi-granular multivariate medical measurements
… able to accurately classify multivariate, multi-granular time series patient data. The approach ultimately taken in this thesis involves using Z-Score normalization to make variables comparable, Single Value Decomposition to reduce the number of features, and a Support Vector Machine to classify …
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Stress Transmission in a Granular System
… The stress field within each grain in the granular media is studied, contributing new insights beyond the commonly reported force chains. The ‘stress chain’ concept is considered as an alternative way to reflect grain breakage that may initiate on the weak force network and compromise the …
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Modelling dry granular flows over topography
Dry granular flows are common and important in the environment and industry, and yet their behaviour is very poorly understood. The dynamics of individual grains are governed by the simple and well-known laws of Newtonian mechanics, but how do these 'microscopic' particle-level laws translate into …
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Investigating multi-directional inhomogeneous granular suspensions
Granular flows in rotating drums find many applications in industry, even though the dynamics of their granular media is not fully understood. Several models of granular flow and granular suspensions (where a viscous fluid is present in the voids between the granular particles) have been proposed …
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