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Showing 1 to 16 of 16 for “"buoyancy-driven flows"”.
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Computational simulation of buoyancy-driven flows using vortex methods
… new vortex method for simulating two-dimensional buoyancy-driven flows is presented. This Lagrangian method utilizes a discrete representation of the known density field along with the vorticity transport equation and Boussinesq approximation to yield the baroclinically-generated vorticity field, …
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Experiments on the dynamics of buoyancy-driven flows in reactive porous media
Reactive flows in porous media are of great interest to a number of geological and industrial situations where fluid of one composition invades a formation containing a solid component with which it can react. Geological situations include dolomitisation of limestone following invasion of sea water …
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Uncertainty quantification of engineering systems using the multilevel Monte Carlo method
… prototypical examples: structural vibrations and buoyancy driven flows through porous media. In the first example, the impact of random mass density is quantified for structural vibration problems in several dimensions using the multilevel Monte Carlo method. Comparable eigenvalues and energy …
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Rotating gravity current and channel flows
… 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 conserving theory …
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The flow of rivers into lakes: Experiments and models
… in predicting contaminant transport from inflows to lakes. Reducing the uncertainty contributes both to understanding lake ecosystems and protecting water resources. In field observations, the progressive stages of the inflow were interpreted as a laterally falling plunge region with little …
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Wind- and thermal-driven air flows and the buoyancy and advection effects on air exchange within urban environments
… study we focus on thermal effects on urban air flows. The thermal effects are extended beyond what is found in the literature to better understand the thermo fluid processes within urban areas. A field experiment on the air flow within an urban street canyon was performed to examine the …
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Numerical simulations of airflow and heat transfer in a room with a large opening
… dynamics (CFD) was used to model single-sided buoyancy-driven natural ventilation in a single room with a heater and door. The velocity and temperature profiles at the doorway agreed fairly well with published literature that includes Mahajan's experimental [2] and Schaelin et al's numerical …
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A Numerical Study of Unsteady Natural Convection in a Rectangular Enclosure -- The Effect of Variable Thermodynamic and Transport Properties
… is adopted to investigate the development of buoyancy driven circulation patterns and temperature contours inside a rectangular enclosure filled with a compressible fluid where one of the vertical walls of the enclosure is kept at a higher temperature than the opposite one. Fluid thermodynamic …
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Paleohydrogeology of the Alberta Basin, Canada
… results indicate the development of compaction-driven, topography-driven and buoyancy-driven flows in the basin during the 100 million year history of basin deposition, uplift and erosion. Compaction-driven flow occurred during deposition of the foreland basin (100 Ma to 60 Ma). A regional fluid …
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Computational studies of viscoelastic multiphase flows
… and viscoelastic drops in simple shear and buoyancy driven flows. The roles of the governing dimensionless parameters: Capillary number (Ca), Deborah Number (De) and the polymer concentration parameter c, in determining deformation of drops and bubbles, are also analyzed. The numerical code …
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Box models of thermohaline circulation
This thesis investigates a number of buoyancy-driven flows in stratified environments that are motivated by the thermohaline circulation of the ocean. Simple models are presented which reduce the dynamics to a few leading order processes and we present an intuitive investigation with simple …
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Filling flows induced by a convector in a room
… distribution through convector-induced filling flows. A standard approach to evaluate convector performance is based on the convector strength only, the implication being the stronger the convector the better the performance. This work has gone beyond the limits of a stereotypical assessment in …
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Hybrid Ventilation Flows
… understanding of the behaviour of hybrid flows and only limited quantitative guidance available for designers. The term hybrid ventilation encompasses a whole spectrum of strategies which incorporate both mechanical elements, i.e. fans, and natural elements, i.e. vents which enable a …
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Wind-Induced Exchange in Semi-Enclosed Basins
… was to study the interaction between the wind-driven and buoyancy-induced flow over laterally varying bathymetry. In particular the influence of the earth's rotation and the transverse circulation were examined. The interaction between the wind-induced and buoyancy-driven flow was characterized …
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Studies in living porous media
… to distinguish them. By directly measuring air flows inside mounds of the Indian termite Odontotermes obesus, we show that they use diurnal ambient temperature oscillations to drive cyclic flows inside the mound. These cyclic flows in the mound flush out CO2 from the nest and ventilate the …
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Multiphase Flow Dynamics in Confined Domains—A DNS Study of Bubbly, Thermal and Riblet-Induced Turbulence
… of multiphase and wall-bounded turbulent flows using high-fidelity direct numerical simulations (DNS), with an emphasis on the fundamental mechanisms governing heat transfer, turbulence modulation, and instability-driven transition. By systematically studying three canonical …