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Showing 1 to 20 of 46 for “"Oscillatory flow"”.
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Oscillatory Flow Driven by Cavity
<p>Flows past a cavity are known to exhibit an oscillatory behavior with an amplitude and frequency dependent on the incoming flow properties and the geometry of the cavity. Experiments and numerical analyses have been performed to determine the effects of a flow passing through an axisymmetric …
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Scale-up of oscillatory flow mixing
Oscillatory Flow Mixing is a recent development in mixing technology which has evolved over the past decade. It has a number of similarities to other mixing technologies, particularly pulsed and reciprocating plate columns, but at the laboratory scale has demonstrated a number of advantageous …
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Oscillatory Flow Mechanism for Enhanced Heat Transfer
<p>This research project is about the use of an oscillatory flow mechanism to enhance heat transfer. The idea behind this is to induce oscillation of the end wall of one of two connected chambers of a heat exchanger which effectively will induce oscillation of the boundary layer within the …
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Bed Morphology and Sediment Transport Under Oscillatory Flow
… ripple planform geometry under a broad range of flow conditions, and the effect of orbital velocities on the ripple size under long water excursions. Regarding the planform geometry of the ripples, the results showed that narrow facilities restrict the three-dimensional development of bedforms. …
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A study of oscillatory flow through a bronchial bifurcation
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1987.
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Velocity moment analysis on oscillatory flow above self-formed vortex ripples
This thesis investigated the flow characteristics of oscillatory flow above self-formed vortex ripples. Using the data collected by Admiraal et al. (2006), phase-averaged and time-averaged mean velocities, root-mean-square speeds, turbulent kinetic energy, Reynolds shear stress, and higher order …
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An experimental study of the stability of oscillatory-flow bed configurations
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric and Planetary Sciences, 1984.
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Lift forces on a sphere close to a boundary in oscillatory flow
… sphere close to a horizontal boundary under oscillatory flow conditions. The investigation relates to the role which lift plays in the mechanism of sediment transportation. The apparatus developed for the laboratory simulation consisted of a sphere mounted a different distances away from a …
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Instability of Oscillatory Flow in Ducts and Applications to Solid -Propellant Rocket Aeroacoustics
Prior research has shown that oscillatory or modulated flows can achieve a significant increase in heat transfer relative to the corresponding steady flow, providing that a critical or threshold amplitude is achieved. The threshold condition is associated with the production of near-surface …
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Analysis of Oscillatory Flow in the Vicinity of Wall Obstacles in Plane Conduits
Made available in DSpace on 2014-12-12T00:25:45Z (GMT). No. of bitstreams: 1 7206890.pdf: 3556647 bytes, checksum: d113bf3631b0ec0eb0939e38373c0e5f (MD5) Previous issue date: 1971
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In-line and transverse forces on a cylinder near a boundary in oscillatory flow
… on a cylinder placed near a plane boundary in oscillatory flow. The value of performing such work is that it provides information on the forces that may be exerted by surf ace waves on a pipeline or cable mounted near the sea bed. Investigations were carried out in a laboratory, using a water …
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Oscillatory Flow As A Means Of Enhanced Species Separation: A Three Dimensional Time-accurate Cfd Analysis
… takes place even if there is no net total flow over a cycle of the pulsatile motion. When more than one species in dilute amounts is present in an otherwise pure fluid, called a carrier, each species is transported at a different rate thereby causing a partial separation of the species. …
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Hydrodynamic performance of multi-component structures in oscillatory flow, from blow-out preventer to dual Cylinder interference
… BOP model works in the range of overall laminar flow regime and thus, results in an inversely proportional relationship between the drag coefficient and KC number. However, the box model does not exhibit the large values of drag and added mass coefficient found in the BOP, which must be …
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Numerical Study of Convective Heat Transfer in Flat Tube Heat Exchangers Operating in Self-Sustained Oscillatory Flow Regimes
… of flat tube heat exchanger devices operating in flow regimes in which self-sustained oscillations occur were performed. The unsteady flow regimes were transition flow regimes characterized by cyclic variations of flow parameters such as stream-wise or cross-stream velocity. A computer code was …
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Flow of power law fluids with application to oil drilling
… is concerned with a theoretical study of the flow behaviour of inelastic power law fluids in two different types of flow situation. These are: 1. The creeping motion of a sphere moving through an expanse of liquid. 2. The combined steady and oscillatory flow of a liquid through a straight tube …
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Improvement In Acoustic Liner Attenuation In Turbofan Engines By Means Of Plasma Synthetic Jet Actuator
… engine noise. Plasma actuators have been used as flow control devices in other settings and will now be studied as an enhancement for acoustic liners. A plasma actuator can excite oscillatory flow or a single direction (bias flow). Both flow types are studied as possible means to excite turbofan …
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Numerical modelling of an oscillatory baffled column
… was to develop a numerical model to resolve the flow field in a general OBC. This model can then later be modified to be used to model the more complex aBC that is presently being experimentally tested by the Mineral Processing Research Unit at the University of Cape Town. The commercial CFD code …
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Tidal dynamics and dispersion around coastal headlands
… Depth-averaged shallow water equations forced by oscillatory flow are solved numerically for Gaussian headlands. The tidal flows around these headlands are shown to be characterized by flow separation and. transient eddy formation. Idealized models of flow separation and the transport and damping …
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Analytical and experimental studies of plant-flow interaction at multiple scales
… to river reaches, the interaction between water flow and vegetation has important ecological and engineering implications. At the reach-scale, vegetation is often the largest source of hydraulic resistance. Based on a simple momentum balance, we show that the resistance produced by vegetation …
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Effect of Acoustic Oscillations on the Burning of Carbon
… with the investigation of the effect of oscillatory flow on the burning of carbon. This involves the study of two separate problems. The first is to obtain a solution for combustion of a carbon particle surrounded by a stationary gaseous film, and the second is to obtain a solution for …
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