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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 “"Viscous friction"”.
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Load Carrying Capacity and Viscous Friction Losses of Oil Films in Hydrodynamically Lubricated Involute Spur Gears
Made available in DSpace on 2014-12-09T17:13:30Z (GMT). No. of bitstreams: 1 6407157.pdf: 4741175 bytes, checksum: bb42de73b3975e80374b688dd772440b (MD5) Previous issue date: 1964
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Self-propulsion of small droplets on thin liquid films
… using a model that scales thin oil film viscous friction to the momentum of the vapor ejected from beneath the boiling droplet.
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Mechanical Characteristics of Male Urethral Catheterization: Simulator and Cadaveric Donor Study
… profile over rate-dependent effects such as viscous friction. In cadaveric studies, the average prostate region force was found to be higher than non-prostate region force. Average catheterization forces in simulators (8.1N) were roughly 45 percent higher than in donors (5.6N) when …
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A fluid loop actuator for active spacecraft attitude control - A Parametric Sizing Model and the Design, Verification, Validation and Test with a Prototype on an Air Bearing
… loops, and includes the power consumption due to viscous friction. A configurable prototype was developed to verify the model, as well as a spherical air bearing to verify the rotational aspects of the various fluid loop configurations. The model was applied to various hypothetical missions. In …
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Heating effects on magnetorheological dampers
… Many types of devices are currently used such as viscous, friction or tuned mass dampers; however, one of the most recent promising systems proposed is the Magnetorheological damper (MR damper). Because of their ability to be controlled and to adapt their mechanical properties by varying a …
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Capillarity in lithographically patterned micro channels
… the analytical visco-gravitational solution. The viscous friction contribution was found to be higher than predicted by theory assuming a non-rigidified liquid–air boundary, but far below that for a rigidified boundary, which is recently reported for imbibition into horizontally mounted open micro …
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Performance prediction model for positive displacement helical screw flowmeters
… leakage flow, speed related leakage flow, viscous friction, mechanical friction, constant friction, impulse energy losses and ball bearing friction, respectively.<br/><br/>This model was applied to a twin-screw type displacement flowmeter which uses two helical rotors which form separate …
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A Novel Fluid Structure Interaction and Thermal Model to Predict the Cylinder Block / Valve Plate Interface Performance in Swash Plate Type Axial Piston Machines
… an important source of power losses due to viscous friction and leakage flow.</p> <p>An accurate prediction of the time changing characteristics of the interface, in terms of fluid film thickness, dynamic pressure field, load carrying ability and energy dissipation is necessary to generate …
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Acoustic and Thermal Properties of Recycled Porous Media
… are able to absorb incident sound waves through viscous friction, inertia effects and thermal energy exchanges. The materials developed are also able to insulate against heat by suppressing the convection of heat and reduced conductivity of the fluid locked in the large proportion of close-cell …
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Experimental and Modeling of Pneumatic Tire Performance on Ice
… of tractive performance, the estimation of the viscous friction due to the water layer, and the influence of braking operations including the locked wheel condition. Experimental studies, carried out at the Terramechanics, Multibody, and Vehicle Systems (TMVS) Laboratory, were performed on the …
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Experimental Characterization and Modeling of Tire-Ice Interface
… film created by the heat generated due to the friction force. Next, the viscous friction coefficient at the contact patch is obtained. By using the thermal balance equation at the contact patch, dry friction is obtained. Knowing the friction coefficients for the dry and wet regions, the …
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Structure-functionality relationship of collagen scaffolds for tissue engineering
… preserving the elastic modulus and the viscous friction to the state of the unfrozen 3D stressed structure (STR). This result underscores the importance of CPA in preserving the cytoskeleton structure and how that impacts functional properties of the tissue after freeze-thaw cycles. ^ …
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Turbulent interactions between stream flow and near-subsurface flow: a laboratory approach using particle image velocimetry and refractive index matching
… vortices from streambed grains, rather than via viscous friction as in a classic smooth wall boundary layer. The geometry and dimensions of turbulent flow structures—determined via multi-point correlations of velocity fluctuations and Galilean decompositions—appear similar to those of hairpin …
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Smart Dampers Applied to Upper-Limb Rehabilitation Training Systems
… approaches. The theoretical model combines the viscous-friction and the controllable field-dependent characteristics of the MR fluid in which a Bingham plastic model was used to simulate the shear stress of the fluid under various input conditions.The numerical approach involved a special …
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Softmatter tribology: Understanding the microstructure to property relationships of hydrogel-like materials
… i.e. a load-bearing tissue that maintains low friction and wear. In fact, recent studies have shown that the cartilage’s articulating surface comprises of a network of highly hydrated mucins, polysaccharides, glycoproteins, and phospholipids, which play a key role in maintaining low friction in …
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Multi-Length Scale Modeling of Rubber Tribology For Tire Application
… surfaces in relative motion which includes friction and wear. Tire friction is an essential concept for estimating the tractive effort/ traction at the tire-road interface that further helps to determine the control and stability of the vehicle. In contrary, it also results in rolling …
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Achieving Efficient Control of Hydraulic Systems Using On/Off Valves
… element, meaning the valve must only overcome viscous friction. This has the potential to enable much higher switching speeds than conventional valves. However, with this novel valve architecture, there are a number of design trade-offs that must be negotiated. In chapter 4, the design of the …