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 98 for “"Complex Fluids"”.
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Three Experiments on Complex Fluids
The behaviour of complex fluids is fundamentally interesting and important in many applications. This thesis reports on three experiments on the thermal and rheological behaviour of complex fluids. The first is a study of the rheological properties of and heat transport in a saline solution of …
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Non-equilibrium polymeric complex fluids
Complex fluids are commercially- and industrially-important materials which exhibit ordering on scales much larger than atomic. Their usage is typically in non-equilibrium conditions, however traditional methods for measuring rheology are not appropriate for measuring samples with gradients …
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Viscosity Modeling of Complex Fluids
… these factors makes predicting the viscosity of fluids difficult. Despite decades of research in this area, accurate prediction of viscosity for a wide range of substances and mixtures remains a challenge. The work presented here investigated four aspects of the viscosity modeling of complex …
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Multiscale Modelling of Complex Fluids
L'abstract è presente nell'allegato / the abstract is in the attachment
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Dynamics of nanoparticles in complex fluids.
… These mixed systems have a higher degree of complexity than the separate systems. In order to understand their behavior, knowledge from each subfields of soft matter has to be put together. One of these complex systems is the mixture of nanoparticles with macromolecules such as polymers, …
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Structure and Dynamics of Complex Fluids
Going further from the study of anisotropic colloidal clusters, I studied the alignment of rod-like molecules confined between two sheets of mica to the thickness comparable to the molecular size. Anisotropy in molecular orientation and shear moduli of the confined film, which strongly depended on …
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Integral equation theories for complex fluids
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1994.
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Hydrodynamics of swimming microorganisms in complex fluids
… flow field. Microorganisms often swim in complex fluids, exhibiting non-Newtonian behavior, including viscoelasticity and shear-thinning viscosity. These biological materials contain network of glycoprotein fibers and gel-like polymers. Therefore on the scale of microorganisms, their fluid …
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Soft hydrated sliding interfaces as complex fluids
… material lubrication are due to distinct complex fluid behavior characterized by weakly or strongly time-dependent response and thixotropy-like hysteresis. Tribo-rheometry is particularly suited to uncover the lubrication mechanisms of complex interfaces such as are formed with hydrated …
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Hydrodynamic interactions of complex fluids and fibrous media
Hydrodynamic interactions of fluids and fibers are encountered in many applications, from filtration processes to the development of novel materials such as nanofluids and nanocomposites, and even in biological systems such as transport of fluids in plants and tissues. It is therefore, valuable …
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Nonlinear dynamics of complex fluids in fragmentation and fracture
The fragmentation and breakup of complex fluids are fundamental elements of many industrial and biological processes. The fracture of food gels, atomization of paints, combustion of fuels containing anti-misting agents and application of pharmaceutical and agricultural sprays, as well as …
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The linear and nonlinear rheology of multiscale complex fluids
The microstructures of many complex fluids are typically characterized by a broad distribution of internal length scales. Examples of such multiscale materials include physically and chemically cross-linked gels, emulsions, soft colloidal glasses and concentrated suspensions. Due to the complex …
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Rheology, conductivity, and structure of complex fluids in flow batteries
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-05-01
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Engineered interfaces controlling the nucleation and flowability of complex fluids
… mobility of water and even low surface tension fluids was demonstrated using surfaces with engineered chemistry and textures, with driving forces ranging from electrical, magnetic, gravitational, as well as Marangoni forces. Engineered surfaces were also shown to control and improve processes …
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Physical interpretation of coarse-grained bead-spring models of complex fluids
… and thermal fluctuations on the morphology of complex fluids with molecular weights of 104 - 106 g/mol using lattice and continuous space molecular simulations.
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Extensional viscosity of complex fluids and the effects of pre-shear
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2003.
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Viscous Fingering Instability of Complex Fluids in a Radial Hele-Shaw Cell
… can develop at the interface between the two fluids. The instability manifests itself in the form of finger-like patterns of the displacing fluid propagating through the displaced one. In this work, viscous fingering instabilities involving complex fluids in a radial Hele-Shaw is investigated. …
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Tricks and tips for faster small-scale swimming: Complex fluids and elasticity
… filaments in order to self-propel in viscous fluids. Often swimming occurs in complex, nonlinear fluids, e.g. mucus. Futhermore even in simple Newtonian fluids, if swimming appendages are deformable then locomotion is subject to fluid-structure interactions. The fundamental question addressed …
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Near-Field Hydrodynamics of Optically Trapped Colloids in Simple and Complex Fluids
… from a solid interface, in water and in complex fluids. These results are further complemented by Molecular Dynamics simulations. I show that hydrodynamic interactions between two trapped colloids encode detailed information about the surrounding flow field and its modulation by nearby …
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Interplay of flow and microstructure in complex fluids: Semiflexible polymer solutions and emulsions
This thesis investigates the interactions between inicrostructural properties and flow conditions in polymeric solutions and in emulsions. An efficient algorithm is presented for Brownian dynamics simulations of semiflexible bead-rod chains with configuration-dependent anisotropic bead friction …
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