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 15 of 15 for “"Flow Topology"”.
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The Investigation of Crossflow Velocity and Off-the-Surface Streamtrace Topology for a Moderately Swept Wing at Transonic Mach Numbers
… of this thesis is to investigate the crossflow and off-the-surface velocity traces on a moderately swept wing at transonic Mach numbers. Computational Fluid Dynamics (CFD) was used to generate the data used to visualize the flow field. This was done for angles of attack of 6, 7, 8 and 10 …
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Experimental investigation of liquid fragmentation in hypersonic cross flow
… of liquid injected into Mach 6 hypersonic cross flow. Flow topology, shock and vortex systems, fragmentation and atomization mechanisms are investigated using high-speed photography, Schlieren photography, flow visualization and Phase Doppler Interferometry techniques. All experiments are …
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Effects of shape geometry in viscous streaming
Viscous streaming flows generated by objects of constant curvature (circular cylinders, infinite plates) have been well understood. Yet, characterization and understanding of such flows when multiple body length- scales are involved has not been looked into, in rigorous detail. We propose a …
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Viscous streaming in 3D and its applications
… this thesis, we extend an existing 3D numerical flow–structure interaction (FSI) solver based on Remeshed Vortex Method (RVM) for the simulation and analysis of 3D streaming flows. We validate the accuracy and capability of the solver against a range of 3D streaming problems from single to …
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Skin Friction and Cross-flow Separation on an Ellipsoidal Body During Constant Yaw Turns and a Pitch-up Maneuver with Roll Oscillation
The skin friction and cross-flow separation location on a non-body-of-revolution (non-BOR) ellipsoidal model performing constant-yaw turns and a pitch-up maneuver, each with roll oscillation were studied for the first time. The detailed, low uncertainty, flow topology data provide an extensive …
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Virtual Planar Motion Mechanism Testing of 8:1 Spheroids
… In order to help explain the complexity of the flow during PMM tests, a flow analysis of the 8:1 spheroid is provided, which discusses the flow topology of spheroids at steady angle of attack, validity of quasi-steady models, and some other basic flow features seen in PMM testing. In this paper, …
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Effects of pore-scale fluid flow on fluid-solid reactions in porous and fractured media
… issues. Recent studies have shown that fluid flow is one of the key controlling factors in fluid-solid reactions because it significantly affects the concentration gradients of reactants at the fluid-solid interfaces. Subsurface flow rates exhibit significant variability, and fluid inertia can …
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Application of hybrid Computational Fluid Dynamics turbulence model, STRUCT-[epsilon], on heated flow cases
… method that can be used to characterize fluid flow, pressure drop, and thermal transient behavior in complex flow geometries. However, with current CFD simulation techniques, the accurate modeling of turbulence structures is often prohibitively expensive or time-intensive. Therefore, a new …
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Three dimensional topology and structural differences in the turbulent wake of cantilevered square and circular cylinders protruding thin boundary layers
… experimental study is conducted of the flow around cantilevered circular and square-section cylinders to investigate the effects of the cylinder geometry and the boundary layer state on the wake structures and flow topology. Detailed velocimetry results are presented in the wake of …
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Experimental and Numerical Investigations of the Effects of Incident Turbulence on the Flow Over a Surface-Mounted Prism
… of the effects of free stream turbulence on the flow field over a surface-mounted prism is examined through experimental and numerical investigations. In the experimental studies, particle image velocimetry measurements are conducted in the ESM water tunnel at Reynolds number of $9,600$ and under …
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Geometry induced flow disturbances
… arterial system. In the vicinity of bifurcations flow tends to separate forming re-circulation regions. In addition, due to the pulsatile character of blood flow during the deceleration part of the cycle, the flow becomes unstable and transition to turbulence may occur. Vascular stents provide a …
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Thermal-hydraulic characterization of single- and two-phase immersion cooling for electronic modules
… poorly characterized, especially when complex flow geometries, buoyancy effects, and device-to-device interactions are present. This thesis experimentally investigates single- and two-phase immersion cooling of a representative multi-device PCB in a commercially available dielectric fluid. The …
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Corner effects for oblique shock wave/turbulent boundary layer interactions in rectangular channels
… corners, resulting in a highly three-dimensional flow field in the near-wall region. To examine how the corner separations can affect the ‘quasi-two-dimensional’ main interaction and by what mechanism this is achieved, an experimental investigation has been conducted. This examines how …
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The Unsteady Topology of Corner Separations
… little is understood about the unsteady topology of these separations. One of the problems with studying corner separations is that it is often difficult to understand whether a particular flow structure in the separation is inherent to the separation itself, or due to the response of the …
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Numerical modeling and simulation of cavitating flows in different regimes
… eddysimulation (LES) of multiphase cavitating flows over different cavitation regimes. Unstructured grids are considered to enable complex geometries to be considered. The dissertation has the following major components: (i) a compressible homogeneous approach for a mixture of water–vapor–gas …