Results 31 to 40 of about 4,129,928 (338)
Solutions of the Navier–Stokes Equation at Large Reynolds Number [PDF]
, 1975 The problem of two-dimensional incompressible laminar flow past a bluff body at large Reynolds number (R) is discussed. The governing equations are the Navier-Stokes equations. For R = ∞, the Euler equations are obtained. A solution for R large should be
Lagerstrom, Paco A.
core +1 more source
Modified Norris–Reynolds One–Equation Model
Procedia Engineering, 2015 AbstractA modified version of Norris–Reynolds (NR) k–equation turbulence model is proposed to account for the distinct effects of low– Reynolds number (LRN) and wall proximity. The turbulent kinetic energy k and the dissipation rate E are evaluated using the k–transport equation in conjunction with the Bradshaw and other empirical relations.
Rahman, M.M. +4 more
openaire +3 more sources
Enabling New Flexibility in the SUNDIALS Suite of Nonlinear and Differential/Algebraic Equation Solvers [PDF]
ACM Transactions on Mathematical Software, 2020 In recent years, the SUite of Nonlinear and DIfferential/ALgebraic equation Solvers (SUNDIALS) has been redesigned to better enable the use of application-specific and third-party algebraic solvers and data structures.
D. Gardner +3 more
semanticscholar +1 more source
Effect of Couple Stress Lubrication on Symmetric Hole-Entry Hybrid Journal Bearing
Tribology Online, 2017 The present study deals with capillary compensated symmetric hole-entry hybrid journal bearing under couple stress lubricant. Reynolds equation has been modified considering couple stress lubricant in the bearing system. The Galerkin’s Technique has been
Nathi Ram
doaj +1 more source
Tribology Online, 2022 This paper presents a modified Reynolds equation for analyzing thin film lubrication with a saturated high-viscosity surface layer on a solid surface.
Kyosuke Ono
doaj +1 more source
Physics-informed neural network for hydrodynamic lubrication with film thickness discontinuity
FrictionRecent advancements in physics-informed neural networks (PINNs) have shown promise in solving partial differential equations (PDEs), including those in hydrodynamic lubrication. However, PINNs struggle with film thickness discontinuities because of their
Bochao Guan +4 more
doaj +1 more source
A Multicoefficient Slip-Corrected Reynolds Equation for Micro-Thin Film Gas Lubrication
International Journal of Rotating Machinery, 2005 This work investigates and analyzes the performance of conventional slip models among various regimes of Knudsen number and developes a new multicoefficient slip-velocity model, by using Taguchi quality control techniques and numerical analysis.
Ng Eddie Yin-Kwee, Liu Ningyu
doaj +2 more sources
Turbulence Model Selection for Low Reynolds Number Flows. [PDF]
PLoS ONE, 2016 One of the major flow phenomena associated with low Reynolds number flow is the formation of separation bubbles on an airfoil's surface. NACA4415 airfoil is commonly used in wind turbines and UAV applications.
S M A Aftab +3 more
doaj +1 more source
, 2018 The accuracy and utility of rotordynamic models for machinery systems are greatly affected by the accuracy of the constituent dynamic bearing models.
T. Snyder, M. Braun
semanticscholar +1 more source
An Enhanced Stochastic Two-Scale Model for Metal-to-Metal Seals
Lubricants, 2018 Leakage in static metal-to-metal seals is predominantly determined by the topography of the contacting surfaces. The topography consists of features that span the entire range from its carefully engineered geometry down to micro-sized surface asperities.
Francesc Pérez-Ràfols +1 more
doaj +1 more source