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 14 of 14 for “"Secondary Motion"”.
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Secondary Motion in Meandering Streams: An Experimental Study
… curvature invariably results in the emergence of secondary motion, which is motion in the direction normal to that of the stream. This work concerns the mechanics of flow in meandering rivers, focusing specifically on secondary motion. A series of laboratory experiments was carried out in a …
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Modeling piston secondary motion and skirt lubrication with applications
… of an existing model for the piston's secondary motion and skirt lubrication. Model development has been focused on introducing liner dynamic deformation, temperature and shear-thinning effect on viscosity, and arbitrary skirt's shape definition. The theory behind the inclusion of these …
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Development of a numerical model of piston secondary motion for internal combustion engines
The reciprocating motion of the piston of an internal combustion engine in the vertical plane is referred to as its primary motion, and it is this primary motion that produces power in the engine. Due to the fact that there is a clearance between the piston and the liner, and that certain forces on …
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Numerical modeling of piston secondary motion and skirt lubrication in internal combustion engines
… effect of oil film thickness on piston lateral motion, tilt, friction generation and oil transport.
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On the secondary motion induced by oscillations in a shear flow / dc by David John Benney.
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Mathematics, 1959
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A Study of the Effects of Piston Secondary Motion on Piston Ring Conformability and Coolant Cavitation in Heavy-Duty Engines
… The simulation workflow incorporated piston secondary motion and oil transport, transient structural finite element analysis of the cylinder, and a curved beam ring-liner conformability model. Significantly higher ring-liner clearance and higher contact were observed. As a result, higher oil …
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Turbulence models for non-circular ducts and channels
… procedures for flows in which turbulence-driven secondary motion plays an important role. The focus is on fully-developed flows in closed ducts and open channels of various cross-sectional geometries. Two different turbulence models were evaluated: a complete Reynoldsstress- transport model and a …
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Adaptation of task-aware, communicative variance for motion control in social humanoid robotic applications
… for generating communicative, human-like motion for social humanoid robots was developed. Anticipation, exaggeration, and secondary motion were demonstrated as examples of communication. Spatiotemporal correspondence was presented as a metric for human-like motion, and the metric was used …
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Modeling piston skirt lubrication in internal combustion engines
… all the dynamic behavior of the piston secondary motion and the structural deformation of the piston skirt and cylinder liner. Major contributions of this work are analysis of and development of a model for the oil transport and exchange of the piston skirt region and its surroundings. …
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Physically-based animation of plant motions
… of complicated non-inertial effects into plant motion. Previous works tend to either focus on quasistatic simulations - which by defnition assume the absence of non-inertial effects - or ignore secondary motion in their dynamics calculations altogether. Either of these result in incomplete …
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Convection in Corrugated Slots
… is limited to its subcritical values where no secondary motion takes place in the absence of corrugation. Corrugations have a sinusoidal form characterized by the wave number a, the upper and lower amplitudes and the phase difference between the upper and lower corrugation systems. They create …
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A multi-scale model integrating both global ring pack behavior and local oil transport in internal combustion engines
… all kinds of piston and liner distortion, piston secondary motion, bridging, and lube-oil dilution on gas sealing, oil transport and lubrication. As a result, optimization of the ring designs and the part of block design contributing to bore distortion can be coordinated to reduce development …
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Elements of lubricant transport critical to piston skirt lubrication and to leakage into the piston ring pack in internal combustion engines
… as and most especially, the influence of piston secondary motion on the latter. These key findings enable us to design a better, more efficient piston in the future—in fact, one recent design iteration of the piston skirt has already revealed the benefits of this approach. The OCR is at the …
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Curved beam based model for piston-ring designs in internal combustion engines
… (ID) to outer diameter (OD) effects. The piston secondary motion and the variation of oil viscosity on the liner with its temperature in addition to the existence of fuel and the different hydrodynamic cases (Partially and fully flooded cases) are considered as well. This model revealed the ring …