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 13 of 13 for “"Low-Reynolds number flows"”.
-
Experimental studies of shear stress and flow separation in low Reynolds number flows
… theory of separation in unsteady two-dimensional flows, and an evaluation of a novel optical shear stress sensor. Fixed separation in the rotor-oscillator flow is studied for steady, periodic, and quasi-periodic fluid motion. Experimental results are directly compared to numerical simulations, …
-
Experimental Investigation of Drag Reduction by Trailing Edge Tabs on a Square Based Bluff Body in Ground Effect
… vortex shedding and reducing drag for low Reynolds number flows. In the present study a square based bluff body, both with and without tabs, will be tested under the same conditions, except this time operating within proximity to a ground plane in order to mimic the properties of …
-
Ferrofluid surface and volume flows in uniform rotating magnetic fields
… for meniscus shapes and resulting surface driven flows, spin-up flows, and Hele-Shaw cell flows and instabilities. To characterize the water-based and oil-based ferrofluids used in experiments, measurements were made of the magnetization curve, surface tension, viscosity, density, and the speed of …
-
Propulsion devices for locomotion at low-Reynolds number
… built, and tested three novel devices that use low-Reynolds number flows for self propulsion. The three-link swimmer is designed to swim through in a free viscous fluid using cyclic flipping motion of two rigid fins attached to a rigid midsection. Robosnail 1 uses lubrication pressures …
-
Micro-mechanical logic for field produceable gate arrays
… and relevant force fields in fluid dynamics at low Reynolds Number is undertaken. Viscous forces dominate inertial forces at low Reynolds Number flows at low pressure. Thus devices based on non-linear inertial effects at high Reynolds numbers can not be scaled down to micron-sizes. Bubble …
-
EFFECTS OF WALL PLANE TOPOLOGY ON VORTEX-WALL INTERACTIONS IN A FORCED IMPINGING JET
… of a rotorcraft is simplified using a prototype flow consisting of an acoustically forced impinging jet. The goal of the current investigation is to quantify the effects of disturbances to the ground-plane boundary layer on the three-dimensional development of the vortex ring as it interacts with …
-
A new parabolized Navier-Stokes scheme for hypersonic reentry flows
High Mach number, low-Reynolds number (high-altitude) reentry flowfield predictions are an important problem area in computational aerothermodynamics. Available numerical tools for handling such flows are very few and significantly limited in their applicability. A new implicit fully-iterative …
-
Effects of Leading-Edge Flame Behavior on Flame Stabilization and Blowout
… jet flames. Methane, nitrogen, and co-flowing air were regulated and directed through a burner that created fully-developed fuel flow with concurrent air. The behavior of the reaction zone at the leading-edge was analyzed from digital images obtained from a camera optimally positioned to …
-
Investigation of transition to turbulence at low Reynolds numbers using Implicit Large Eddy Simulations with a Discontinuous Galerkin method
… the formation of laminar separation bubbles at low Reynolds numbers and the related transition to turbulence. In addition to being one of the first Implicit Large Eddy Simulation studies using a high-order Discontinuous Galerkin method, unique attention is given to the boundary layer …
-
Hydraulic Resistance due to Emergent Wetland Vegetation
… a friction factor or a bulk drag coefficient. At low Reynolds numbers typical of flows in wetlands, hydraulic resistance is orders of magnitude higher than fully turbulent flows and resistance parameters are functions of the flow regime as well as the vegetation density and structure. The exact …
-
Swimming at low Reynolds number slip boundaries and interacting filaments
Biological microorganisms swim in different types of fluids using a range of diverse motions and are often found in complex geometries. Their study is a rich field full of outstanding problems. One aspect that has attracted a lot of attention is the role played by hydrodynamic interactions, …
-
Some problems in low Reynolds number environmental flows
… provide insight into the physics governing the flows and to determine the dependencies on a few parameters. We study the fluid dynamics of carbon dioxide storage in heterogeneous aquifers, the migration of tracers in such flows and the interaction of lava flows with barriers. First, in chapter …
-
Dynamics and statistics of hydrodynamically interacting particles in laminar flows
… of hydrodynamically interacting particles in low Reynolds number flows, which is discussed in three interrelated themes. The first theme focuses on polymer fractionation. With our basic model we explore the possibility to sort dumbbells with respect to their size using a two dimensional …