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 16 of 16 for “"Open-channel flows"”.
-
Analytical and Numerical Models for Velocity Profile in Vegetated Open-Channel Flows
The presence of vegetation in open channel flow has a significant influence on flow resistance, turbulence structures and sediment transport. This study will evaluate flow resistance and scale velocity profile in depth limited flow conditions, specifically investigating the impact of vegetation on …
-
Turbulent structures in smooth and rough open channel flows: effect of depth
… on turbulent structures in smooth and rough bed open channel flow. When the rough bed is introduced in the shallow flow, the local turbulence near the roughness element intensifies and becomes highly heterogeneous. The model roughness under study consists of a train of two dimensional square ribs …
-
Analytical and Numerical Models for Velocity Profile in Vegetated Open-Channel Flows
The presence of vegetation in open channel flow has a significant influence on flow resistance, turbulence structures and sediment transport. This study will evaluate flow resistance and scale velocity profile in depth limited flow conditions, specifically investigating the impact of vegetation on …
-
Analytical and Numerical Models for Velocity Profile in Vegetated Open-Channel Flows
The presence of vegetation in open channel flow has a significant influence on flow resistance, turbulence structures and sediment transport. This study will evaluate flow resistance and scale velocity profile in depth limited flow conditions, specifically investigating the impact of vegetation on …
-
Analytical and Numerical Models for Velocity Profile in Vegetated Open-Channel Flows
The presence of vegetation in open channel flow has a significant influence on flow resistance, turbulence structures and sediment transport. This study will evaluate flow resistance and scale velocity profile in depth limited flow conditions, specifically investigating the impact of vegetation on …
-
Analysis of Stage-Discharge Relations for Open -Channel Flows and Their Associated Uncertainties
The volumetric flow rate of water in open channels (discharge) is commonly estimated from the measured water-surface elevation (stage) using empirical relations fit to many measurements of discharge and concurrent stage. While these relations, often referred to as ratings, have been used for over a …
-
Numerical study on internal flow structures of subaqueous density underflows and stratified open-channel flows
The internal structure of subaqueous density underflows and stratified open channel flows are examined in this study. Three different flow configurations are used to investigate the effects of density stratification on the internal structure and the responses of the structure as flow conditions …
-
Exoelectrogenic biofilm growth in shearing flows
… interacting with surfaces under these open channel flows contend with high shear rates and active transport to the surface. The metallic surfaces they interact with carry charge at various potentials that are little addressed in literature. We demonstrate for the first time that mass …
-
Sediment Control In Alluvial Rivers Using Simulation-Based Optimization
… may creates excess erosion and deposition in channels or river reaches and cause changes in flow characteristics and fluvial geomorphology. Severe sediment erosion such as in-stream sever bed and bank erosion or gullying can threaten the stability of in-stream hydraulic structures, river …
-
Extended Momentum Model for Single and Multiple Hydrokinetic Turbines in Subcritical Flows
… factors from a series of two porous discs in open channel flows. The new model includes blockage ratio and Froude number as independent variables, which are inferred in advance to yield a single solution in the prescribed domain. The theoretical extension is integrated with the Blade Element …
-
Flutes, megaflutes and erosional bedforms: a reappraisal of their dynamics
… generation of flutes upon a smooth mud-bed in open channel flows. High-resolution bathymetric data taken in time-series during experiments demonstrate that bedforms are stable, migrate downstream with time, and form in association with features not previously generated under experimental …
-
A Multi-Resolution Direct Numerical Simulation of Turbulent Stratified Flows with High Prandtl Numbers
The turbulent structure of stratified open-channel flow subjected to a radiative volumetric heat source modelled by the Beer–Lambert law, for Prandtl numbers (𝑃𝑟) ranging 0.07 to 7, is investigated using direct numerical simulation (DNS). Most prior DNS studies of stratified turbulent open-channel …
-
Effects of boundary roughness on turbulence in uniform open channel flow
… the process of sediment transport and mixing in open-channel flows. In this study, using highly controlled laboratory experiments, the effects of various bed configurations on turbulence, shear stresses, and other parameters have been analyzed and quantified and the results compared to previous …
-
Mechanics of Sandbag Motion In Free-Surface Flow
… The problem of the motion of sandbags in open-channel flow is complex since the sandbag shape varies from a very flat hump to spherical, sandbags may be porous and permeable, and the water content of the sandbag may vary from being totally dry to almost fully saturated.</p> <p>The research …
-
Particle motion in the near bed region of a turbulent open channel flow: Implications for bedload transport by saltation and sediment entrainment into suspension
… particles in the near bed region of a turbulent open channel flow. Two different aspects of this phenomenon are examined, namely the mode of transport denoted as saltation, and the process of particle entrainment into suspension. The main approach followed is experimental, using visualization and …
-
Anaerobic digestion comparison of manure leachate by high-rate anaerobic reactors
… anaerobic conditions. In addition, manifolds and open-channel flows were recommended in this research to enhance the reactors configurations. Moreover, results from hydrodynamic studies were applied to provide recomndations for future design parameter, which are included in this thesis.