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 29 for “"hydrodynamic flow"”.
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Stochastic dynamics of cell adhesion in hydrodynamic flow
In this thesis the interplay between hydrodynamic transport and specific adhesion is theoretically investigated. An important biological motivation for this work is the rolling adhesion of white blood cells experimentally investigated in flow chambers. There, specific adhesion is mediated by weak …
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The influence of hydrodynamic flow on microstructure evolution during solidification
… we present a detailed study of the influence of flow on the microstructure evolution during solidification. First, we use a classical sharp interface approach combined with an accurate fluid flow solver to simulate dendritic growth under the influence of an imposed flow. Secondly, we include …
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Design of a free-running, 1/30th Froude scaled model destroyer for in-situ hydrodynamic flow visualization
Hydrodynamic flow visualization techniques of scaled hull forms and propellers are typically limited to isolating certain operating conditions in a tow tank, circulation tunnel, or large maneuvering basin. Although cost effective, these tests provide a limited perspective on the interactions of the …
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SINGLE-MOLECULE STUDY OF THE FORCE-INDUCED ACTIN POLYMERIZATION MEDIATED BY FORMIN
… ON THREE SINGLE MOLECULE MANIPULATION TOOLS: HYDRODYNAMIC FLOW, OPTICAL TWEEZERS AND MAGNETIC TWEEZERS. USING HYDRODYNAMIC FLOW, SINGLE ACTIN FILAMENTS CAN BE STRETCHED IN HIGH-THROUGHPUT. HOWEVER, THOUGH THERE MAY BE SOME WEAK DECREASE OF CRITICAL CONCENTRATION BY FORCE, ITS LOW SENSITIVITY …
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Hydrodynamics of mine impact burial
A general physics based hydrodynamic flow model is developed that predicts the three-dimensional six degrees of freedom free fall time history of a circular cylinder through the water column to impact with an unspecified bottom. Accurate vertical impact velocity and impact angle parameters are …
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The trial of the holographic principle
… fluid dynamics. Foundations of relativistic hydrodynamics, conformal invariance, and geometry of anti-de Sitter spaces are discussed. We then detail an explicit calculation relating the dynamics of a non-stationary nonsymmetrical 3+1 dimensional black hole on an anti-de Sitter background to …
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Electric Field Gradient Focusing-UV Detection for Protein Analysis
… field gradient focusing (EFGF) utilizes a hydrodynamic flow and an electric field gradient to focus and concentrate charged analytes and order them in a separation channel according to electrophoretic mobility. Elution can be achieved by decreasing the applied voltage or increasing the …
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Numerically modeling the evolution of dust grains in galaxy formation simulations
… as a passive scalar advected according to hydrodynamic flow. This model accounts for processes that affect the interstellar dust budget, like stellar dust production, accretion of gas-phase metals, and supernova-driven destruction. Using the moving-mesh hydrodynamics code arepo, I perform …
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Hydrodynamic and economic modelling of tidal current energy conversion systems.
… of: 1. Tidal current analysis and prediction 2. Hydrodynamic flow modelling 3. Tidal resource analysis 4. Optimised economic modelling Appropriate survey set-up is essential in gathering data. Given this, processing the data using velocity profiles; statistical techniques; and harmonic analysis …
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A one dimensional hydrodynamic simulation of colliding quasi neutral plasma systems
… realise experimentally. A one-dimensional (1D) hydrodynamic simulation of quasineutrality- compliant colliding plasma systems has been developed and is described. The model is based on a multi-fluid theory due to P W Rambo and J Denavit [J. Comput. Phys. 98 (1992) 317] and uses a flux-corrected …
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Synthesis of Metallic Nanowires Using Integrated DNA Molecules as Templates
… single-tethered DNA molecules using hydrodynamic flow as well as an electric field-induced thermal flow. (ii) These networks then serve as a template for a selective in-situ photoinduced nucleation and growth of platinum clusters of 4 nm diameter along the DNA molecules. In the …
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Quantum transport in strongly interacting, ultracold fermi gases in box potentials
… of fermion transport, with relevance for hydrodynamic flow of electrons, neutrons, and quarks.
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Non-equilibrium dynamics of adsorbed polymers and filaments
… tips. Uniform driving forces can be generated by hydrodynamic flow or by electric fields for charged polymers. In the second part, we consider collective filament motion in motility assays for motor proteins, where filaments glide over a motor-coated substrate. The model for the simulation of the …
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Application of microfluidic emulsion technology to biochemistry, drug delivery and Lab-on-a-Chip programmability
… of two or more microchannels, combining crossflow and viscoelastic shear, to generate emulsions. Droplet sizes may be tuned from nanometers to microns in diameter, controlled by device geometry and hydrodynamic flow characteristics. The application of droplets as individual bioreactors for …
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CFD simulation of the dynamic flow behavior in a bubble column reactor
… This model is able to predict the bubbly flow parameter such as gas holdup, contact surface area, air volume fraction, pressure drop, and velocity magnitude to understanding the hydrodynamic flow behaviors. Three types of gas distributor design are tested on the 1.5 m height and 0.15 m …
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Expression and behaviour of GPI-anchored surface proteins in trypanosomes
… antigen-immunoglobulin complexes, resulting from hydrodynamic flow, to the posterior end of the cell, effectively concentrating them in the flagellar pocket where they are endocytosed. Here, the question was asked: was this self-cleaning process present in the ancestor of African trypanosomes or …
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Diffusiophoresis in complex and confined fluids
… reducing the problem to a diffusio-osmotic flow. In the simulations, we drive the system out of equilibrium by applying microscopic representations of the chemical potential gradient that are compatible with periodic boundary conditions. We then report the first applications of such a method …
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Strangeness production in a quark-gluon plasma
… 4 we use Bjorken's framework of one-dimensional hydrodynamic flow to study the evolution of a gluon plasma, through the production of quarks to a later stage, by which times hadrons should be prevalent. Of critical importance is the thermal equilibration time. We derive some analytic expressions …
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Annular Flow Synthesis and Assembly of Two-Dimensional Materials
… limiting their potential in many applications. Hydrodynamic shear and solvent-surface interactions have recently been suggested to play dominant roles in wet synthesis, but have not been properly explored. Here I developed new methods to both synthesize and analyse inorganic and metal-organic …
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Corrosion Behaviors of Coated Aluminum Alloys in Simulated Corrosive Environment
… various corrosive conditions, specifically, hydrodynamic flow, immersion in salt water and DI water, varying temperatures, and simulated sun light. The hydrodynamic conditions were simulated using a rotating cylinder electrode (RCE) with rotational speeds of 200, 400, 600, 800, and 1000 rpm. …
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