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 20 of 27 for “"Motion of particles"”.
-
Stability of flat galaxies
… we investigate the existence and properties of stationary solutions of the flat Vlasov-Poisson system. This system of partial differential equations can be used as a model of extremely flat astronomical objects and is a combination between the two-dimensional motion of particles and the …
-
Examination of Fluid-Particle in Turbulent, Non-Dilute, Particle Suspension Flow
Theoretical modeling and experimental studies of particles suspended in fully developed turbulent water flow in a vertical pipe (I.D. = 18.4 cm) have been conducted. An analytical model has been developed to predict the stochastic motion of particles in a non-dilute turbulent suspension flow. The …
-
Evaluation of the sonically induced narrowing of nuclear magnetic resonance spectra of solids
The Nuclear Magnetic Resonance (NMR) spectra of liquids contain a wealth of quantitative information that may be derived, for instance, from chemical shifts and spin-spin couplings. The available information depends on the incoherent rapid molecular motion that causes complicating effects present …
-
Multiple Light Scattering from Isotropic and Anosotropic Turbid Media
The Brownian motion of particles in a fluid is a problem with spectacular historical roots [1, 2] and continues to provide us with intriguing new physics. Recently there has been resurging interest in the first steps of these motions [3, 4, 5, 6, 7, 8]. This is largely a result of new experimental …
-
Analysis of Interphase Chromatin Motion in HeLa Cells
<p>Motion of particles under influencing forces may be observed under light microscopy techniques. Variations in mobility of particles may give relevant biophysical information. Automated high resolution single particle tracking techniques were used to characterize interphase chromatin mobility in …
-
ΜΑΘΗΜΑΤΙΚΑ ΜΟΝΤΕΛΑ ΜΕΤΑΦΟΡΑΣ ΜΑΖΑΣ ΣΤΗΝ ΑΤΜΟΣΦΑΙΡΙΚΗ ΡΥΠΑΝΣΗ
… AN INSTRUMENT IN STUDYING THE DYNAMIC BEHAVIOUR OF ATMOSPHERIC POLLUTION. THE ADVANTAGE OF THIS METHOD IS THE POSSIBILITY OF GIVING REALISTIC ESTIMATIONS OF POLLUTANT CONCENTRATIONS UNDER CONDITIONS OF LACK OF ANALYTIC METEOROLOGICAL DATA AND IN SITES WITH COMPLICATED METEOROLOGICAL FIELDS. …
-
The statistical mechanics of continuous random networks
… permanent random covalent bonding, a fluid of atoms or small molecules is transformed into an amorphous solid network. Being amorphous, local structural properties in such networks vary across the sample. A natural order parameter, resulting from a statistical-mechanical approach, captures …
-
Acoustic Particle-Image Velocimetry: development and applications
… in a fluid flow. The fluid is seeded with tracer particles and the region under investigation is illuminated. An image of the illuminated region is captured and then, a short time period later, a second image is taken. Suitable analysis of these images yields an instantaneous velocity vector map. …
-
Lattice Vibration Study Of Silica Nanoparticle In Suspension
… considerable research has been done in the area of "nanofluids". Nanofluids are colloidal suspensions of nanometer size metallic or oxide particles in a base fluid such as water, ethylene glycol. Nanofluids show enhanced heat transfer characteristics compared to the base fluid. The thermal …
-
Surface forces during electrophoretic assembly of micron scale silica particles
A system of platinum microelectrodes was fabricated on a sapphire substrate by lithographic patterning and used to manipulate 1.58 [mu]m silica particles in-plane. A digital video system was used to image the motion of particles far from the electrodes and their deposition onto the working …
-
Predicting Motion of Engine-Ingested Particles Using Deep Neural Networks
The ultimate goal of this work is to facilitate the design of gas turbine engine particle separators by reducing the computational expense to accurately simulate the fluid flow and particle motion inside the separator. It has been well-documented that particle ingestion yields many detrimental …
-
Modeling moderately dense to dilute multiphase reacting flows
Computational modeling of multiphase flows consists of two broader sets of methods: resolved approaches where the multiphase entities (MPE) are larger and resolved on the computational grid, and dispersed approaches where the MPEs are relatively small and not resolved on the grid but they are …
-
Experimental gravity with electromagnetic and gravitational waves
… observations can be used to elucidate the nature of compact objects and the fundamental properties of the material in their vicinity. Our ability to extract information about the underlying physics from observations of both electromagnetic and gravitational spectra depends on our understanding of …
-
Understanding Membrane Curvature Sensing
… functions. To study the curvature sensitivity of proteins, I have developed a single-particle assay using NanoSight technology that tracks the Brownian motion of particles to measure their size. I optimised this system to track fluorescently labelled lipid-binding domains bound to liposomes of …
-
Particle acceleration at null-point current sheets in the solar corona
… can be used to create analytical geometries of reconnecting fields within which particle acceleration can be simulated. A code was written to use a predictor-corrector algorithm to model the full motion of particles in such fields, switching to a Runge-Kutta guiding-centre scheme (adapted …
-
The study of the influence of the lifter height on the charge motion, velocity profile and power draw of a laboratory tumbling mill using DEM simulations
… by the mill speed, filling and the configuration of the lifter bars attached to the mill shell (height, width, face angle, etc.). The lifter height has been shown to influence the charge motion and power draw of the mill. Most of the predictive power models used in industry do not consider lifter …
-
Results on the interaction between atomistic and continuum models
… to a spatial description. Due to the absence of a deformation mapping field in atomistic simulations, it is uncommon to define atomistic fields in the reference configuration. We show that the Murdoch--Hardy procedure can be modified to obtain pointwise continuum fields in the reference …
-
Modelling of a microfluid ultrasonic particle separator
Particles within an ultrasonic standing wave experience an acoustic force causing the particles tomove to certain positions within the acoustic field. This phenomenon can be used to manipulate particles and so provides a means to separate, concentrate or trap particles, cells or spores. The work …
-
Mathematical and Computational modelling of soft and active matter
The collective motion of organisms such as flights of birds, swimming of school of fish, migration of bacteria and movement of herds across long distances is a fascinating phenomenon that has intrigued man for centuries. Long and details observations have resulted in numerous abstract hypothesis …
-
Particle Motion in Flows: Contributions to Airborne Aerosol Measurement
<p>Accurate, in situ measurement of airborne particles is critical in understanding the global atmosphere. An airborne instrument is designed to sample and measure the aerodynamic diameter of particles in the size range of 1-30 mm. Knowledge of the aerodynamic size of a particle includes the impact …
Page 1 of 2