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 kind of surface covered with magnetic arrayed film (MAF) was fabricated for magnetic fluid lubrication, and the results showed that the presence of MAF shifts the transition from mixed to hydrodynamic lubrication to higher ratio of speed/load.
12 citations
TL;DR: In this paper, the power-law rheological model is used for the flow of non-Newtonian aqueous polymer solutions in narrow three-dimensional channels of varying gap.
12 citations
TL;DR: In this article, an analytical model for full-film drawing is developed, combining the elastic-plastic membrane finite element code of deep drawing together with full film lubrication theory, and the theoretical results show excellent agreement with the experiment data.
12 citations
TL;DR: In this article, the effects of an electric field on the gravity-driven spreading of two-dimensional droplets down an inclined plane were investigated. But they considered both perfect and leaky dielectric liquids, and perfectly and partially wetting systems.
Abstract: The spreading of droplets may be influenced by electric fields, a situation that is relevant to applications such as coating, printing, and microfluidics. In this work we study the effects of an electric field on the gravity-driven spreading of two-dimensional droplets down an inclined plane. We consider both perfect and leaky dielectric liquids, as well as perfectly and partially wetting systems. In addition to the effects of electric fields, we examine the use of thermocapillary forces to suppress the growth of the capillary ridge near the droplet front. Lubrication theory is applied to generate a set of coupled partial differential equations for interfacial height and charge, which are then solved numerically with a finite-difference method. Electric fields increase the height of the capillary ridge in both perfect and leaky dielectric droplets due to electrostatic pressure gradients that drive liquid into the ridge. In leaky dielectrics, large interfacial charge gradients in the contact-line region cr...
12 citations
TL;DR: In this paper, a concentrated, vertical monolayer of identical spherical squirmers, which may be bottom heavy, and which are subjected to a linear shear flow, is modelled computationally by two different methods: Stokesian dynamics, and a lubrication-theory-based method.
Abstract: A concentrated, vertical monolayer of identical spherical squirmers, which may be bottom heavy, and which are subjected to a linear shear flow, is modelled computationally by two different methods: Stokesian dynamics, and a lubrication-theory-based method. Inertia is negligible. The aim is to compute the effective shear viscosity and, where possible, the normal stress differences as functions of the areal fraction of spheres . This suggests that lubrication theory, based on near-field interactions alone, contains most of the relevant physics, and that taking account of interactions with more distant particles than the nearest is not essential to describe the dominant physics.
12 citations