Results 1 to 10 of about 1,150 (171)

Combined Influence of Noncondensable Gas Mass Fraction and Mathematical Model on Cavitation Performance of Bearing

International Journal of Rotating Machinery, 2020
The presence of cavitation in the oil film seriously affects the bearing lubrication performance and bearing capacity. Now the research of this phenomenon mostly focuses on the model of Reynolds equation (R-E equation) or Navier-Stokes equation (N-S ...
Lili Wang, Zengkai Liu, Guoteng Yuan, Yuliang Wei   +3 more
doaj   +1 more source

Effects of surface roughness on molecular gas lubrication (Direct simulation Monte-Carlo analysis for shear flow)

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

Qualitative properties of the free-boundary of the Reynolds equation in lubrication

Publicacions Matemàtiques, 1989
The hidrodynamic lubrication of a cylindrical bearing is governed by the Reynolds equation that must be satisfied by the preassure of lubricatiog oil. When cavitation occurs we are carried to an elliptic free-boundary problem where the free-boundary separates the lubricated region from the cavited region.
openaire   +5 more sources

Effect of Cylinder Liner Oil Grooves Shape on Two-Stroke Marine Diesel Engine's Piston Ring Friction Force

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, Xiqun Lu, Qun Zheng   +2 more
doaj   +1 more source

Effect of slip/no-slip on finite slider bearing using non-Newtonian micropolar fluid [PDF]

Jurnal Tribologi, 2018
In this paper, the modified Reynolds equation of finite slider bearing lubricated with micropolar fluid is numerically solved for the computational aspects of the bearings.
Pentyala S. Rao, Santosh Agarwal
doaj  

Physics-informed neural network for hydrodynamic lubrication with film thickness discontinuity

Friction
Recent 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, Qiang He, Yang Hu, Zhiyuan Zheng, Weifeng Huang   +4 more
doaj   +1 more source

Porous Hydrodynamic Journal Bearing Analysis Using Micropolar Fluid in Steady-State Condition

Tribology Online, 2019
The objective of the present work is to study theoretically, the steady-state performance of finite hydrodynamic porous journal bearings under micropolar lubrication. The fluid pressure in porous matrix follows Darcy’s equation.
Ujjal Baidya, Sanjoy Das, Santanu Das
doaj   +1 more source

Virial Approximation for Load and Loss in High-Speed Journal Bearings Using Pressurized Gases

Fluids, 2019
We consider steady, laminar, compressible lubrication flows in a high-speed two-dimensional journal bearing governed by the appropriate Reynolds equation. The thermodynamic states correspond to pressurized gases and are in the single-phase regime. Simple
Ssu-Ying Chien, Mark S. Cramer
doaj   +1 more source

Influence of Wall Porosity and Surfaces Roughness on the Steady Performance of an Externally Pressurized Hydrostatic Conical Bearing Lubricated by a Rabinowitsch Fluid

International Journal of Applied Mechanics and Engineering, 2017
In the paper, the influence of both the bearing surfaces roughness as well as porosity of one bearing surface on the pressure distribution and load-carrying capacity of a curvilinear, externally pressurized, thrust bearing is discussed.
A. Walicka, E. Walicki, P. Jurczak, J. Falicki   +3 more
doaj   +1 more source

Navigating the Dynamics of Squeeze Film Dampers: Unraveling Stiffness and Damping Using a Dual Lens of Reynolds Equation and Neural Network Models for Sensitivity Analysis and Predictive Insights

Mathematics
The squeeze film damper (SFD) is proven to be highly effective in mitigating rotor vibration as it traverses the critical speed, thus making it extensively utilized in the aeroengine domain.
Haobo Wang, Yulai Zhao, Tongguang Yang, Zhong Luo, Qingkai Han   +4 more
doaj   +1 more source