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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 17 of 17 for “"Coriolis forces"”.
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The effect of coriolis forces on performance of two-handed tasks
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1997.
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A Study of Centrifugal Buoyancy and Particulate Deposition in a Two Pass Ribbed Duct for the Internal Cooling Passages of a Turbine Blade
… and heat transfer augmentation due to Coriolis and centrifugal buoyancy forces that arises from density stratification in the domain. Gas turbine engines operate in particle laden environments (sand, volcanic ash), and particulate matter ingested by the engine can make their way into …
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Wall Modeled Large-Eddy Simulations in Rotating Systems for Applications to Turbine Blade Internal Cooling
… is presented that WMLES captures the effects of Coriolis forces and predicts mean heat transfer augmentation ratios reasonably well for all simulations. The alleviated grid resolution for these simulations indicates significant reductions in resources, specifically, by a factor of 10-20 in …
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Dynamics of Langmuir circulation in oceanic surface layers
… always dominate the solution in the absence of Coriolis forces. In the presence of Coriolis forces, the horizontal wavelength and thus the depth of penetration are limited. When a cell geometry is found such that γCLS » γdiff, the current profile produced by small-scale diffusion is unstable to …
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Convective heat transfer in rotating, circular channels
… as predicted through secondary flows caused by Coriolis forces. Moreover, the heat-transfer enhancement is found to be greater than the resulting increase in friction losses due to secondary flows.
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Detached Eddy Simulation of Turbulent Flow and Heat Transfer in Turbine Blade Internal Cooling Ducts
… capabilities of DES in capturing the effects of Coriolis forces, which are induced by rotation, and centrifugal buoyancy forces, which are induced by thermal gradients, are also authenticated. The accurate prediction of turbulent flows is sensitive to the level of turbulence predicted by the …
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Magnetic Stability Analysis for the Geodynamo
… equation where buoyancy, pressure and the Coriolis forces are in equilibrium, we computed the geophysically scaled ratio of the Lorentz to the Coriolis forces and found it to be O(1) for flows with a large convective component. This indicates that transient growth, in particular of …
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Modeling and control of a biorobotic autonomous underwater vehicle
… model of a flapping foil AUV, including the forces and moments due to the flapping foil propulsion. The non-linear model is based on standard characteristic equations for a six degree of freedom problem, with components due to hydrostatics (vehicle weight and buoyancy), hydrodynamic damping …
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Large Eddy Simulations of Flow and Heat Transfer in the Developing and 180° Bend Regions of Ribbed Gas Turbine Blade Internal Cooling Ducts with Rotation - Effect of Coriolis and Centrifugal Buoyancy Forces
… anisotropic, and the presence of rotational body forces further complicates the flow. Large Eddy Simulations are used to study these flows because of their ability to predict the unsteady flow effects and anisotropic turbulence more reliably than traditional RANS closure models. Calculations in a …
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Characterization and analysis of the flight dynamics of fruit flies
… stubby organ behind the forewing which detected Coriolis forces at the base of the wing and created counter-rotations. Both scientists used work done by earlier scientist J.W. Pringle, who modeled the haltere as a mass-dashpot-spring system using dynamics in order to analyze the oscillatory …
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Bond graph model based control of robotic manipulators
… and the non-linear effects of centrifugal and Coriolis forces degrade the accuracy at high manipulator velocities. Improvements in the control of manipulators may be made by incorporating a mathematical model of the manipulator in the control algorithm. Control schemes such as `computed torque' …
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Micromechanical actuators for insect flight mechanics
… the hind wings of two-winged insects, detecting Coriolis forces and thereby mediating flight stability during maneuvers. Early evidence suggests that mechanical stimulus of the antennae may enable flight control. In addition, the crepuscular hawk moth Manduca Sexta has a wide wingspan (~110 mm) …
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Newtonian Twistor Theory
… space can possess anti-self-dual generalised Coriolis forces. We give examples of anti-self-dual Ricci-flat manifolds whose twistor spaces contain rational curves whose normal bundles suffer jumps to O(2 - k) + O(k) for arbitrarily large integers k, and we construct maps which portray these …
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Design and validation of a compact radius centrifuge artificial gravity test platform
… direction of the legs while exercising with the Coriolis forces, thereby eliminating lateral deflection at the knees and reducing the risk of a knee or hip injury. The CRC platform's design process is discussed, and the final design is described in detail. Finally, motor performance is …
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Large Eddy Simulation of Flow and Heat Transfer in a Staggered 45° Ribbed Duct and a Rotating 90° Ribbed Duct
… the leading surface. Secondary flows induced by Coriolis forces, increase heat transfer augmentation on the smooth walls. Finally, the third paper studies the same flow conditions of the second paper and goes further by including effects of centrifugal buoyancy forces using LES. Two buoyancy …
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Aspects of Parity Breaking in Classical and Quantum Fluids
… the level of the constituent particles. External forces can also induce chiral motion, with the primary examples being the Lorentz and Coriolis forces.</p> <p>The effects of parity breaking are perhaps most strikingly seen in active matter, systems of complex particles that tend to convert energy …
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Modelling and analysis of vibrations in flexible cylinders subjected to internal multiphase and external single-phase flows.
… with equations involving centrifugal and Coriolis forces for the analysis and prediction of SIV. New dimensionless equations are derived from the dimensional model to analyse key flow features and improve overall understanding of the model. To capture forces due to VIV, the model uses a …