Results 51 to 60 of about 88,133 (255)
Numerical Simulation of the Lubricant-Solid Interface Using the Multigrid Method
Lubricants, 2023 Solid asperity interactions are common and inevitable under severe loading conditions for any lubricated contact. Heavy-duty machine components (gears, bearings, etc.) generally operate under Mixed Lubrication (ML), where uneven surface features contact ...
Ruchita Patel +3 more
doaj +1 more source
Science Advances, 2023 The Reynolds lubrication equation (RLE) is widely used to design sliding contacts in mechanical machinery. While providing an excellent description of hydrodynamic lubrication, friction in boundary lubrication regions is usually considered by empirical ...
A. Codrignani +8 more
semanticscholar +1 more source
Dynamics of bubble absorption over porous membranes in an immersed medium
Droplet, EarlyView.The dynamics of a bubble interacting with a flat, porous superhydrophobic membrane underwater has been illustrated. Abstract Porous superhydrophobic (SHP) membranes are gaining considerable attention due to their excellent underwater absorption and drag reduction properties. They exploit the Cassie‒Baxter state of wetting to remove the bubble in a fast
Kiran Raj M
wiley +1 more source
A new extended Reynolds equation for gas bearing lubrication based on the method of moments
, 2016 An extended Reynolds equation based on the regularised 13 moment equations and lubrication theory is derived for gas slider bearings operating in the early to upper transition regime.
X. Gu, Haijun Zhang, D. Emerson
semanticscholar +1 more source
Fish Scales: A Multifunctional Biomaterial from Nature
ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.Fish scales demonstrate nature's solution to impact protection through overlapping multilayered architecture. This biological design combines mineralized surfaces with collagen networks to achieve both flexibility and fracture resistance. The structural principles inspire advanced protective materials and biomedical implants, where damage tolerance ...
Liyao Dong, Xiaojie Sun, Xiguang Chen
wiley +1 more source
Nihon Kikai Gakkai ronbunshu, 2020 Molecular gas film lubrication (MGL) equation, which is derived based on linearized Boltzmann equation, is the reliable means to analyze the molecular gas flow in the narrow channel, whose thickness is as thin as the molecular mean free pass. Though, the
Jun-ichi ICHIHARA
doaj +1 more source
Energy Science &Engineering, EarlyView.This review highlights how nano oils and eco‐friendly nano refrigerants enhance energy‐efficient refrigeration by improving thermal conductivity, lubrication, and system performance. The integration of rheological and tribological testing confirms reduced compressor work, better heat transfer, and higher COP using sustainable, low‐GWP refrigerants for ...
Mohammed Dilawar +7 more
wiley +1 more source
Advances in Mechanical Engineering, 2015 The dimensions, area densities, and geometry of macroscale surface textures may affect the performance of hydrodynamic lubrication interface. Reported in this paper are the investigations of the effect of surface textures bottom shapes on the friction ...
Salaheldin A. Mohamad +2 more
doaj +1 more source
An adaptive finite element method for the inequality-constrained Reynolds equation [PDF]
Computer Methods in Applied Mechanics and Engineering, 2017 We present a stabilized finite element method for the numerical solution of cavitation in lubrication, modeled as an inequality-constrained Reynolds equation. The cavitation model is written as a variable coefficient saddle-point problem and approximated
T. Gustafsson +3 more
semanticscholar +1 more source
Lubrication Science, EarlyView.ABSTRACT Porous gas bearings (PGBs) enable high‐speed, oil‐free operation in modern rotating machinery. This study develops a coupled thermo‐hydrodynamic (THD) model for a cylindrical porous gas bearing lubricated with four working fluids—air, R‐134a, helium and hydrogen.
S. Bechiri, B. Bouchehit, B. Bou‐Saïd
wiley +1 more source