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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 20 of 40 for “"Convective flow"”.
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Front Propagation and Feedback in Convective Flow Fields
… induced solutal and thermal feedback to the convective flow field is then studied by solving an exothermic autocatalytic reaction where the products and the reactants can vary in density. A single self-organized fluid roll propagating with the front is created by the solutal feedback while a …
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Convective Flow Patterns of a Three Generation Bifurcation Model
<p>To experimentally study the convective flow patterns of the human lung, a large scale symmetric model was built to model branching airways that air passes through during respiration. The model used in this experiment goes through three symmetrical 70¿¿ bifurcations before terminating at the …
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Some problems involving free convective flow over vertical plates
… dealing with various problems involving free convective flow over a vertical plate is presented. The main topics covered are the effects of surface slip on laminar free convective heat transfer, the laminar free convective flow of non-Newtonian power law fluids, the experimental determination …
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An experimental investigation of the transition to turbulence of the thermal convective flow in air between horizontal plates.
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Meteorology, 1971.
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Mixed convection in laminar/turbulent separated backward-facing step flows
<p>"Mixed convective heat transfer results for two-dimensional laminar/turbulent flow in a duct with a backward-facing step are reported. The two walls forming the duct are maintained at uniform but different temperatures. The straight wall is maintained at the inlet air temperature, while the …
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Thermo-Capillary Driven Flow Under the Influence of Rotation and Magnetic Fields
… convection, the latter being the dominant convective flow in a microgravity environment, significant advantages can be achieved in space based processing. The control of this surface tension gradient driven flow is sought using (1) rotation and (2) magnetic field, and the effects of these …
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Magnetohydrodynamic Effects On Mixed Convection Flows In Channels And Ducts
… on magnetohydrodynamic (MHD) mixed convection flow of electrically conducting fluids enclosed in simple 1D and 2D geometries in steady periodic regime. In particular, in Chapter one a short overview is given about the history of MHD, with reference to papers available in literature, and a …
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Dispersion of fine particles by wave-induced mass transport near a circular island
… motion, we describe the boundary-layer flow field U0i near that cylinder. The flow field is then used to calculate the modified convective velocities Ui and symmetric dispersivities Dij. Through our calculations we have demonstrated convective flow reversal for both large and very small …
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Droplet behavior on superhydrophobic surfaces: Interfaces, interactions, and transport
… of the droplet, and accompanying convection flow field on hydrophobic and superhydrophobic surfaces is important to several applications. In this dissertation, droplet evaporation characteristics on unheated and heated hydrophobic and superhydrophobic surfaces with negligible contact angle …
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Flow visualisation and fundamental aspects of two-dimensional turbulent plumes
… fluid dynamics problems, for example, indoor airflows. Specifically, this thesis focuses on the turbulent plumes which develop above sources which directly supply buoyancy, but zero momentum, to the fluid. Sources of this type are particularly relevant to modelling the convective flows driven by …
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Electrochemical engineering considerations for gas evolution in molten sulfide electrolytes
… electrolyte solutions under steady-state natural convective flow conditions as a means to gain access to thermodynamic, physicochemical, and hydrodynamic properties of these systems. Previous efforts purposely chose operating conditions under which one or more sources of overpotential were …
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Spectroscopy of small scale magnetic structures in the solar photosphere
… <br>concentrations that are embedded in the convective flow field of the <br>solar photosphere. <br>As manifestations of small scale magnetic fields, bright points become <br>important for the understanding of the coronal heating process and the <br>variability of the solar irradiance. …
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Development of experimental methods to measure osmosis-driven water flux and molecular transport across nanoporous graphene membranes
… However, experimental investigation on convective flow of water and ions/molecules in liquid phase across nanopores in graphene has been confined due to difficulties in fabricating large area defect-free graphene membranes and complexity in experiment design considerations for …
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Numerical Investigation on Shape Impact of Deformable Droplets on Evaporation and Combustion: Method Development and Characterization
… of an isolated droplet. Under a highly convective environment inside a gas combustor, due to imbalance of inertial and surface tension forces, the droplets of larger size in sprays exhibit notable deformations from spherical to non-spherical shapes. Such shape changes are generally …
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Convective Heat Transfer in Quasi-one-dimensional Magnetic Fluid in Horizontal Field and Temperature Gradients
<p>In this work we studied the convective heat transfer in a magnetic fluid in both zero and applied magnetic fields. The natural convection is observed in a quasi-one dimensional magnetic fluid in a horizontal temperature gradient. The horizontal non-homogeneous magnetic fields were applied across …
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Physical chemical processes and environmental impacts associated with home composting
… purpose built 200L composting reactors with airflow control were performed. A variety of composting conditions were tested, using different compositions of garden and kitchen wastes. The experiments were monitored for headspace gas composition, including CO2, O2, NH3, N2O, CH4 and volatile …
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Material Characterization of Insect Tracheal Tubes
… and mate- rial design. In the system, the convective flow of gas is driven through local deformations of the tracheal network, a phenomenon that is dependent on the unique structure and material properties of the tracheal tissue. To understand the underlying mechanics of this method of gas …
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Numerical Study of Nutrient Mixing in Trabecular Bone in Microgravity, Disuse and Normogravity
… bone remodeling by driving interstitial fluid flow which stimulates cells and drives nutrient transport within the trabecular network. In microgravity, the absence of mechanical stimulation or loading suppresses convective flow processes, causing diffusion-driven nutrient mixing and renewal, …
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Numerical investigation of the convective heat transfer coefficient of the human body using a representative cylindrical model
… and verify a framework for determining the convective heat transfer co-efficient from a cylindrical model that can easily be adaptable to more complex geometry - more specifically the human body geometry. Analysis of the model under forced convection airflow conditions between the transition …
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