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 24 for “"single-fluid"”.
-
Single-Fluid Approach to Modeling Dark Matter and Dark Energy
Cosmological observations over the past decades have provided overwhelming evidence for the ex istence of dark energy, a mysterious and dominant component responsible for the accelerated expan sion of the universe. The nature of dark energy remains one of the most intriguing puzzles in modern …
-
Using Simulink to Develop a One-Dimensional, Two-Phase Fluid Model
In this thesis, a one-dimensional, two-fluid model is developed in MATLAB-Simulink. The model features a mass, momentum, and energy balance for each fluid--an ideal gas and an incompressible liquid. The simulation may model a straight pipe section, or a pipe section that involves a cross-sectional …
-
3-D Computational Investigation of Viscoelastic Biofilms using GPUs
… viscoelastically under deformation. We propose a single-fluid multi-component phase field model of biofilms that captures this behavior, then use numerical simulations on GPUs to investigate the biofilm’s growth and its hydrodynamics properties.</p>
-
Computational Studies of Ohmic Heating in the Spheromak
… computational simulations using both single-fluid O-D and two-fluid 1 1/2-D models are developed for and utilized in an investigation of the ohmic heating of a spheromak plasma. The plasma density and composition, the applied magnetic field strength, the plasma size, and the plasma …
-
Star formation and disk stability in nearby galaxies
… different models. (i) The thin gas-disk model (single-fluid disk criterion, Qg) was derived for each galaxy in our sample. We use atomic gas for the majority of the sample and we use molecular gas whenever available. (ii) A two-fluid disk criterion which models a galaxy disk with gas and stars …
-
A study of relativistic fluids with applications to cosmology: A variational approach
This thesis examines relativistic fluids. We have used the variational approach to develop tools for studying the dynamics of relativistic fluids to apply this to cosmological modelling. Studies like these go beyond the standard model in cosmology. Researchers believe that such extensions to the …
-
Prediction of turbulent mixing at the interface of density stratified, shear flows using CFD
… with a homogeneous shear flow involving miscible fluids. The other set of simulations dealt with a developing shear layer involving immiscible fluids. The re-fueling of a compensated fuel/ballast tank, which is partially characterized by a shear layer, was also simulated. In all the simulations a …
-
Use of Active Target Detectors in Nuclear Astrophysics: Nucleosynthesis of Fluorine and Fusion of Neon
… of fluorine experiment with a single fluid bubble chamber. The system of neon isotope fusions 20,22,24Ne + 20,22Ne, relevant to physics within neutron star crusts, was measured using the Argonne MUSIC detector. The details of each experiment and the analysis of the data will be …
-
Direct numerical simulation of large bubbles in a free shear layer
… Navier-Stokes equations were employed with a single-fluid model and a front tracking scheme to study large cylindrical, spherical, and ellipsoidal bubbles in a free shear layer. This approach allows direct simulation of the multiphase flow by wholly incorporating the bubble flow field in …
-
Multi-fluid Plasma Modelling
… than the bulk of the plasma. Current plasma fluid treatments assume that the velocity distribution of each particle species is described by a Maxwell-Boltzmann distribution function, and so may not be accurate for plasmas with a significant energetic component. A new method of modelling …
-
Multi-fluid Plasma Modelling
… than the bulk of the plasma. Current plasma fluid treatments assume that the velocity distribution of each particle species is described by a Maxwell-Boltzmann distribution function, and so may not be accurate for plasmas with a significant energetic component. A new method of modelling …
-
Microvascular Networks for Continuous Self -Healing Materials
… fiber-based self-healing composites enable a single repair of crack damage in a given location. Re-mendable polymers have demonstrated crack mending for multiple cycles, but only with heat treatment and applied pressure. We demonstrate, for the first time, the autonomic characteristics of …
-
Verification and Validation of Magnetohydrodynamics Simulations of Electrically Exploded Conductors
… (EOS) for rapidly Ohmic-heated conductors. The single-fluid, resistive MHD code FLAG was used to simulate the phase transitions and bulk hydrodynamic motion of these conductors. The balance of internal and magnetic forces at the conductor-insulator interface drives the metal along the …
-
Free surface flows over submerged obstructions
… Flow configurations involving either a single fluid or two layers of fluid of different but constant densities, are examined. Both the effects of gravity and surface tension are included. Fully nonlinear boundary integral equation techniques based on Cauchy’s integral formula are used to …
-
A Mathematical Analysis of Digestive Processes in a Model Stomach
… focuses on the mixing of two layers of creeping fluid through temporal instability of the perturbed fluid interface. Some attention is also paid to a more general study of the surrounding flow field. Linear, two-fluid flow next to a prescribed, sinusoidally moving wall is found to be stable in …
-
Reduced model for particle laden flow
… It is well known that when a clear viscous fluid flows down an inclined surface under gravity, after some time, the initially straight contact line becomes unstable with respect to transverse perturbations. Clear fluid is easier to use in experiments, but industrial processes usually involve …
-
Production and Use of Alginate Beads Containing Yeast in a Novel Fluidised Bed Bioreactor
… of Alginate Beads Containing Yeast in a Novel Fluidised Bed Bioreactor It was found experimentally that sodium alginate solutions between 1 and 6% concentration formed drops with diameters between 3 and 5 mm at a single fluid nozzle. Drop diameter was largely determined by the tube outer …
-
All Mach Number Schemes for Highly Magnetised MHD flows and Multi-material Modelling
… interface semi-implicit method that extends single-fluid all Mach number schemes for the Euler equations to multi-material scenarios. The proposed algorithm effectively addresses the main challenges encountered by Godunov-type multi- material compressible solvers and is well-suited for …
-
On the structure and dynamics of the Asian monsoon anticyclone
… by considering the dynamical evolution of a single fluid layer forced by a steady mass source. Such a single-layer model can be used to perform more in-depth studies than are possible in a 3D model. Using this approach we explained a variety of phenomena related to westward eddy shedding from …
-
Documenting multiple metasomatic events within the Finero phlogopite peridotite using chlorine isotopes, Ivrea zone, Italy
… Zone were infiltrated by metasomatizing melts/fluids prior to their incorporation into the lower continental crust. Metasomatism resulted in pervasive development of phlogopite and amphibole throughout much of the body, as well as the formation of phlogopite-rich segregations. Previous trace …
Page 1 of 2