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Showing 1 to 20 of 128 for “"fluid velocity"”.
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Statistics of amplitude and fluid velocity of large and rare waves in the ocean
The understanding of large and rare waves in the ocean is becoming more important as these rare events are turning into more common observances. In order to design a marine structure or vehicle to withstand such a potentially devastating phenomenon, the designer must have knowledge of extreme waves …
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Experimental investigation of the fluid velocity distribution in stirred tank reactors equipped with retreat-blade impellers using laser doppler velocimetry
… in any given operation. In this work, the velocity distribution inside the typical glass-lined vessel/impeller system was experimentally quantified using Laser Doppler Velocimetry (LDV), which is a non-intrusive experimental method used to determine the local velocity distribution …
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Intelligent Non-Invasive Thermal Energy Flow Rate Sensor for Laminar and Turbulent Pipe Flows
… rate is the thermal energy that is carried by a fluid, for example, in a pipe to heat or cool a space in a building. It can be measured by an energy flow rate sensor which consists of a volume flow rate meter and supply and return fluid temperature sensors to bill the users for their energy …
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A mm-scale aeroelastic oscillation-based anemometer
… a thin filament can provide a good indication of fluid velocity at small scales. By combining a 'fishtail'-shaped filament's aeroelastic and vortex-forced flutter modes, its oscillation frequency can be confined to scale smoothly with fluid velocity. This principle has been used to produce a …
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Alternating Current Electroosmotic Micropumping Using A Square Spiral Microelectrode Array
… fields. These ions, when driven, induce a net fluid motion due to viscous drag forces. Three submerged microelectrode wires were deposited on a substrate using microfabrication techniques such that a square spiral geometry was formed. Device SP-1 received asymmetrically applied AC signals …
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Enhancing CO2 mass transfer in large scale algal raceway ponds through wave generation
… paddlewheel rotation, a large reduction in fluid velocity was observed on introducing the slope. Higher fluid velocities result in more turbulent flow, better mixing and reduces algae settling in areas of low fluid velocity. The effect of the lower fluid velocity was evident as the increases …
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Influences of Water Chemistry and Flow Conditions on Non-Uniform Corrosion in Copper Tube
Water chemistry and fluid velocity are factors that can perpetuate certain types of non-uniform pitting corrosion in copper tube, specifically in waters with high chlorine and a high pH. These two parameters can further act synergistically to alter pitting propensities in copper pipes subjected to …
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Shallow sea tidal friction and sediment transport
… associated with the accurate estimation of ocean fluid velocity. However, it was found that this was the only significant parameter that could be collected and analysed with the accuracy required for a scientific investigation. No detailed measurements were taken of the sea-bed features or of the …
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Studies On The Behaviour Of Solid Particles In Turbulent Gas Flows
… was based upon a vortex method in which the velocity fluctuations of the turbulent flow were simulated by arrays of randomly positioned vortices. The calculation of the motion of the spherical particles was based upon the forces acting upon a particle as a function of the local fluid …
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Design and Simulation of a Towed Underwater Vehicle
… To measure ocean turbulence, one must measure fluid velocity with great precision. The three components of velocity can be used to compute the turbulent kinetic energy dissipation rate. Fluid velocity can be measured using a five-beam acoustic Doppler current profiler (VADCP). The VADCP needs …
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Thermal Numerical Analysis of Vertical Heat Extraction Systems in Landfills
… of a landfill was developed to approximate fluid temperatures in the HES. A 2-D model was then analyzed over a 40 year time period using the approximate fluid temperatures to determine the heat flux applied by the HES and resulting landfill temperatures. Vertical HES configurations …
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Numerical and experimental evaluation of the erodibility of particle packings with surface treatments and spring reinforcements using the discrete element method
… by tracking eroded particles as a function of fluid velocity. DEM simulations and flume experiments were first performed with a layer of steel particles that served as an extreme case of surface treatment. Similar trends were observed between the simulations and experiments, whereby the number …
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Design and Characterization of Biomimetic Artificial Hair Cells in an Artificial Cochlear Environment
… cochlear environment. Designed to mimic the fluid flows around the inner hair cells of the human cochlea, the artificial cochlear environment produces controlled, linear sinusoidal fluid flows with frequencies between 25 and 400 Hz. The lipid bilayer-based artificial inner hair cell generates …
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Particle dispersion in isotropic turbulence and unsteady particle dynamics at finite Reynolds number
… The Basset force has no effect on the fluid velocity structure seen by the particles or the long-time particle diffusivities. It does affect the intensities of particle motion for particles with large settling rate and with response time comparable to the turbulence integral time scale.
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Design of a data acquisition system to control and monitor a velocity probe in a fluid flow field
… acquisition system to control the position of a velocity probe, and to acquire digital voltages as an indication of fluid velocity is presented. This system replaces a similar manually operated traverse system, it relieves the operator of control and acquisition tasks, while providing a more …
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Convection in a differentially heated rotating spherical shell of Boussinesq fluid with radiative forcing
… study we investigate the flow of a Boussinesq fluid contained in a rotating, differentially heated spherical shell. Previous work, on the spherical shell of Boussinesq fluid, differentially heated the shell by prescribing temperature on the inner boundary of the shell, setting the temperature …
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A three constituent mixture theory model of cutaneous and subcutaneous tissue in the context of neonatal pressure ulcer etiology and prevention
<p>Localized ischemia, impaired interstitial fluid flow, and sustained mechanical loading of cells have all been hypothesized as mechanisms of pressure ulcer (PrU) etiology. Time-varying loading has experimentally been shown to increase fluid flow in human skin <em>in vivo.</em> Towards the design …
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Poroelastic Finite Element Analysis of a Heterogeneous Articular Cartilage Explant Under Dynamic Compression in ABAQUS
… <p>has been made between the relative fluid velocity and stimulation of</p> <p>glycosaminoglycan synthesis. A contour plot of the model shows the relative fluid</p> <p>velocity during compression exceeds a trigger value of 0.25 μm/s at the radial</p> <p>periphery. Dynamic UCC …
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Flow and solute transport in random cylinder arrays : a model for emergent aquatic plant canopies
… length normalized by the mean interstitial fluid velocity and viscosity increases linearly with cylinder Reynolds number. In contrast to the dependence previously reported for sparse arrays at Reynolds numbers greater than 1000, the drag coefficient increases with increasing cylinder density …
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Behavior of Magneto-Rheological Fluids Subject to Impact and Shock Loading
… design of controllable magnetorheological (MR) fluid devices have focused heavily on low velocity and low frequency applications. The extensive work in this area has led to a good understanding of MR fluid properties at low velocities and frequencies. However, the issues concerning MR fluid …
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