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Showing 1 to 20 of 46 for “"Channel flows"”.
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Rotating gravity current and channel flows
… Investigation of rotating gravity currents and channel flows is presented. The study is applicable to buoyancy driven flows through straits, mid ocean ridge valleys and fracture zones, and intermittent gravity currents. In the theoretical study two extensions are achieved to the energy …
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Particle-laden Channel Flows: Mixed Convection and Non-Heavy Particles
L'abstract è presente nell'allegato / the abstract is in the attachment
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Numerical simulation of mixing processes in two-dimensional channel flows
… flow in the entry region of a parallel-plate channel agree well with the work of other authors. For turbulent flows, the system of equations is closed using either Prandtl's mixing-length hypothesis or a turbulence model describing the transport of kinetic energy of turbulence. Present …
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Turbulent structures in smooth and rough open channel flows: effect of depth
… 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 …
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Modeling and simulation of micro/nano-rod distribution in micro channel flows
… of a typical nanorod particle in microscale flows was theoretically investigated, considering the effect of the wall on the rotational and translation motions of the non-spherical particle. Initially, a systematic method using Brownian dynamics simulation of the rotational motion of nanorod …
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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 …
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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 …
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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 …
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Heat transfer at transition to turbulence in channel flows with eddy promoters
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1994.
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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 …
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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 …
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Non-isothermal dynamics of thin-film free-surface and channel flows of non-Newtonian nanofluids
… (e.g. worm-like micellar solutions, granular flows, polymer solutions and some polymer melts) reveal flow instabilities within the flow field, such as the emergence of regions of different shear bands due to the flow induced material non-homogeneities. It has also been observed that it is …
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Effect of self-stratification on channel flows and boundary layers: a study using direct numerical simulations
Flows with suspended sediment are one of the most prevalent type of flows in nature. They can be found in nature as hypoconcentrated flows, mudflows, lahars and turbidity currents, to name a few. Effect of suspended sediment on the flow has wide ranging impact on geomorpholoy, ecological health, …
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A numerical investigation of the linear hydrodynamic stability of Newtonian and weakly non-Newtonian channel flows as described by the Orr-Sommerfeld equation
… this dissertation we consides in part idealised flows between two parallel planes of infinite extent and a finite distance apart. They are referred to as closed channel flows.
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Velocity distribution prediction in rectangular and compound channels under smooth and rough flow conditions
… distributions in single and compound open channels. In this study, velocity distributions in rectangular and compound open channels under different flow regimes, in terms of roughness and turbulence conditions, were investigated experimentally and numerically. The detailed results from the …
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Wave-, wind-, and tide-driven circulation at a well-mixed ocean inlet
… observations and numerical simulations. Tidal flows are ebb-dominated (-1.5 to 0.6 m/s, positive is inland) inside the main (2 to 5 m deep) channel on the (1 to 2 m deep) ebb shoal, owing to inflow and outflow asymmetry at the inlet mouth. Ebb-dominance of the flows is reduced during large …
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Wave-, wind-, and tide-driven circulation at a well-mixed ocean inlet
… observations and numerical simulations. Tidal flows are ebb-dominated (-1.5 to 0.6 m/s, positive is inland) inside the main (2 to 5 m deep) channel on the (1 to 2 m deep) ebb shoal, owing to inflow and outflow asymmetry at the inlet mouth. Ebb-dominance of the flows is reduced during large …
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Direct Numerical Simulation of Turbulence in a Model Solid Rocket Motor
… are similar to those observed in turbulent channel flows.
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Mixing and secondary circulation in Juan de Fuca Strait
… dynamics and vertical structure of transverse flows are much less understood, despite the role these currents play in redistributing water properties and momentum throughout the estuary. One such estuary, Juan de Fuca Strait, is an ideal location in which to study estuarine exchange and the …
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Mean-Field Free-Energy Lattice Boltzmann Method for Liquid-Vapor Interfacial Flows
… numerical development to simulate liquid-vapor flows and the applications to microchannels. First, we obtain a consistent non-local pressure equation for simulating liquid-vapor interfacial flows using mean-field free-energy theory. This new pressure equation is shown to be the general form of …
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