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 10 of 10 for “"Film flows"”.
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Squeeze-film flows, with application to the human knee joint
The squeeze-film flow of a thin layer of Newtonian fluid filling the gap between either a flat or a curved rigid impermeable solid coated with a thin rigid or elastic layer and moving under a prescribed constant load towards a thin rigid porous bed of uniform thickness coating a stationary flat …
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Nonlinear interfacial stability of core-annular film flows in the presence of surfactants
… interfacial instabilities found in core-annular flows in the presence of surfactants. Core-annular flows arise when two immiscible fluids (for example water and oil) are caused to flow in a pipe under the action of ail axial pressure gradient. In one typical type of flow regime, the fluids …
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Experiments in turbulent soap-film flows: Marangoni shocks, frictional drag, and energy spectra
… of the frictional drag in turbulent soap-film flows over smooth walls. These flows are effectively two-dimensional, and we are able to create soap-film flows with the two types of turbulent spectrum that are theoretically possible in two dimensions: the ``enstrophy cascade,'' for which the …
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Thin-film flows and soft hydraulics with complex fluids for environmental and microfluidic-based applications
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2027-05-01
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Development and validation of a thermodynamic model for predicting mode transitions in falling film flows over horizontal tubes
Horizontal-tube, falling-film heat and mass exchangers are important to many industries, with example applications in thermal desalination, vapor compression machines, absorption chillers, and natural gas liquefaction. Falling-film heat and mass exchangers are attractive for these applications …
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Falling-film evaporation over horizontal rectangular tubes
… study is the first investigation of falling-film evaporation over horizontal rectangular tubes. This geometry is representative of the external profile of microchannel tubes. Incorporating these designs into shell-and-tube heat exchangers has the potential to provide compact, high-performance …
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Dewetting of thin solid films
… an anisotropic free boundary condition at the film/substrate contact line which correspond to the natural boundary condition from the variational derivation. We show via matched asymptotic analysis that the resulting sharp interface model is consistent with the pure surface diffusion model. In …
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Modeling and Analysis of Falling Liquid Films
… work, we consider the dynamics of falling liquid films in various geometries. We first ex- amine the dynamics of a thin film formed by a distributed liquid source on a vertical solid wall. The mathematical model is derived using the lubrication approximation and includes the effects of gravity, …
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Influence of side walls and undulated topography on viscous gravity-driven film flow
While a gravity-driven viscous film flow down an inclined flat plane of infinite extent can be described by an easy analytical solution, flow problems in nature, like glacier movements or the liquid film on the human eye are much more complex. Also to optimize a large number of technical …
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Moving contact lines, wetting transitions and interfacial instabilities in confined environments
Immiscible fluid flows are ubiquitous in nature and industry, from multiphase-flow phenomena on geologic scales such as CO2 sequestration and methane venting from seafloor sediments to bubble/drop/emulsion generation in microfluidic techniques. All these flows are inherently multi-scale, from the …