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 13 of 13 for “"moderate Reynolds number"”.
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MOVING WALL JET FLOW NEAR CHANNEL EXIT AT MODERATE REYNOLDS NUMBER
… two-dimensional jet flow of a Newtonian fluid at moderate Reynolds number, emerging from a channel and flowing along one moving plate, while the other plate is stationary, is examined theoretically in this study. In this case, the equations of motion are reduced by expanding the flow field about …
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PRESSURE DRIVEN WALL JET FLOW NEAR CHANNEL EXIT AT MODERATE REYNOLDS NUMBER
… by a pressure gradient near channel exit at Reynolds Number ranging from the order of 10 to 100, emerging from a two-dimensional channel is examined theoretically in this study. Poiseuille flow conditions are assumed to prevail far upstream from the exit. The problem is solved using the …
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Computations of Flow Structures and Heat Transfer in a Dimpled Channel at Low to Moderate Reynolds Number
… ratio of 0.2 is used in the calculations. The Reynolds number (based on channel height) varies from Re = 25 in the laminar regime to Re = 2000 in the early turbulent regime. Fully developed flow and heat transfer conditions were assumed and a constant heat flux boundary condition was applied to …
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Boundary integral/spectral element solution of the Navier-Stokes equations
… at sequential time increments. For low to moderate Reynolds number flows, time stepping tests of the complete method provided stable Navier-Stokes simulations for simple model flows in an arbitrary geometry. The patching of the elemental solution fields into a domain-wide complete solution …
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The Effect of Persistent Vortices on Boundary Layer Behavior in Turbulent Flow along a Kelvin-Stuart Cat's Eyes Wavy Wall
… and hot-wire experiments in a water tunnel at moderate Reynolds number reveal that a persistent vortex will relaminarize the boundary layer along wavy even in the presence of freestream turbulence. This result is consistent with Dawson [7] who found similar boundary layer behavior using a von …
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Lattice Boltzmann simulations of multiphase flows
… and fluid dynamics. We present results for a number of fundamental flow problems including droplet impingement on solid and liquid surfaces as well as multiphase flow in complex micro-channels. In addition, we examine in great detail the problem of axial droplet migration and deformation in a …
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Statistical Analysis of High-Order Moments from Direct Numerical Simulation of a Turbulent Boundary Layer
High-order zero-pressure-gradient turbulent boundary layer statistics are important for turbulence modeling efforts and insight into the nature of turbulent flow. In this thesis, a complete database of third-, fourth-, and fifth-order central velocity moments is presented. The statistics were …
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Structure-Property Relations in Bubble and Solid Particle Suspensions with Moderate Reynolds Numbers
In this study, several important properties of inertial bubble and solid particle suspensions have been characterized using numerical simulations. These properties include the hindered settling velocity and microstructure in solid particle suspensions, the scaling of the velocity variance and …
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Improving turbomachinery loss prediction using high fidelity CFD
… fidelity simulations, it is found that error in moderate Reynolds number (Re_c>300,000) compressor cascades is dominated by errors due to the turbulence model, as opposed to errors inherent to the use of a turbulence viscosity or the RANS method itself. Significant errors due to using turbulence …
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Cross-plane stereo-PIV measurements of a turbulent boundary layer over highly irregular roughness
… the cross-flow, spanwise-wall-normal, plane at moderate Reynolds number. The single-point turbulence statistics in this plane displayed strong spanwise heterogeneity, in particular spanwise-alternating low- and high-momentum flow pathways in the mean flow marked by enhanced Reynolds stresses and …
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The Influence of Trailing Edge Shape and Kinematics on Bio-inspired Pitching Panels
… that were varied in a systematic manner at moderate Reynolds number. The wakes behaviors and wake dynamics of these panels are explored in a time-varying and time-averaged sense using results obtained from multiple planes of stereoscopic particle image velocimetry. The time-averaged and …
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Experimental study of low-order models of highly-irregular roughness and their impact on turbulent boundary layers
… for developing- and developed-flow conditions at moderate Reynolds number followed by stereo PIV measurements in a wall-parallel plane deep in the roughness sublayer (y = 0.047δ). Comparison of both single- and multipoint statistics (mean velocity and Reynolds normal and shear stresses) as well as …
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Large eddy simulation of shock boundary layer interaction control using micro-vortex generators
… with downstream total pressure measurements. The moderate Reynolds number of 3,800 based on displacement thickness allowed the computations to use Large Eddy Simulations without the subgrid stress model (LES-nSGS). The LES predictions indicated that the shock changes the structure of the turbulent …