Topic
Lubrication theory
About: Lubrication theory is a research topic. Over the lifetime, 1713 publications have been published within this topic receiving 50261 citations. The topic is also known as: Fluid bearing.
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TL;DR: In this paper, a model for long peristaltic waves propagating steadily down a fluid-filled, axisymmetric tube is derived, and the resulting deformation of the tube wall is modelled using linear elasticity and the internal flow using the lubrication approximation.
Abstract: A model is derived for long peristaltic waves propagating steadily down a fluid-filled, axisymmetric tube. The waves are driven by imposing a radial force of prescribed form on the tube. The resulting deformation of the tube wall is modelled using linear elasticity and the internal flow using the lubrication approximation. Numerical solutions for periodic wave trains and solitary waves are presented, along with asymptotic solutions at both small and large forcing amplitudes. Large-amplitude periodic waves are characterized by narrow blisters adjoining long occluded sections of the tube, whereas a solitary wave of strong contraction produces a long inflated bow wave that propels a large quantity of fluid. A measure of pumping efficacy is given by the ratio of the net fluid displacement to the power input, and is highest for a large-amplitude solitary wave.
72 citations
TL;DR: In this article, the dynamic characteristics of hydrodynamic journal bearings lubricated with micropolar fluids are presented, and the modified Reynolds equation is obtained using the micropolastic lubrication theory.
72 citations
TL;DR: In this article, the authors present a simulation to model the flow and coalescence of the multiple fluid drops and the effect the number of drops dispensed has on imprinting time, which is shown to decrease with increasing numbers of drops or with an applied force on the template.
72 citations
TL;DR: A critical examination of Constantinescu's theory of turbulent fluid film lubrication has been undertaken as mentioned in this paper, and several of its anomalies were traced to violations of certain well-established basic phenomena in turbulent shear flows.
Abstract: A critical examination of Constantinescu's theory of turbulent fluid film lubrication has been undertaken. Several of its anomalies were traced to violations of certain well-established basic phenomena in turbulent shear flows. A new approach, which is free of some of these objections, has been made. It holds promise of yielding a more consistent turbulent lubrication theory. Comparison is given on infinitely long bearing with Constantinescu's results. Contributed by the ASLE Technical Committee on Bearings and Bearing Lubrication and presented at the Annual Meeting of the American Society of Lubrication Engineers held in Chicago, Illinois, May, 1964.
71 citations
TL;DR: Capacite de charge de deux plaques paralleles glissant l'une sur l'autre en regime de frottement mixte. Etude des mecanismes mis en jeu as discussed by the authors.
Abstract: Capacite de charge de deux plaques paralleles glissant l'une sur l'autre en regime de frottement mixte. Etude des mecanismes mis en jeu
71 citations