scholarly journals Two-Phase Flow CFD Analysis of Temperature Effects on Oil Supplied to Small-Bore Journal Bearing with Oil Supply Groove

2018 ◽  
Vol 13 (5) ◽  
pp. 232-240 ◽  
Author(s):  
Fuma Sakai ◽  
Masayuki Ochiai ◽  
Hiromu Hashimoto
Keyword(s):  
Temperature Effects ◽  
Journal Bearing ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Cfd Analysis ◽  
Two Phase ◽  
Oil Supply

scholarly journals Analysis of Oil-Air Two-Phase Flow Characteristics inside a Ball Bearing with Under-Race Lubrication

Processes ◽  
2020 ◽  
Vol 8 (10) ◽  
pp. 1223
Author(s):  
Heyun Bao ◽  
Xiaonan Hou ◽  
Fengxia Lu
Keyword(s):  
Ball Bearing ◽  
Two Phase Flow ◽  
Volume Fraction ◽  
Flow Characteristics ◽  
Lubricating Oil ◽  
Phase Flow ◽  
Two Phase ◽  
Inlet Velocity ◽  
Oil Supply ◽  
Circumferential Distribution

Under-race lubrication can increase the amount of lubricating oil entering a bearing and greatly improve lubrication and cooling effects. The oil-air two-phase flow characteristics inside a ball bearing with under-race lubrication play a key role in lubrication and cooling performance. The motions of ball bearing subassemblies are complicated. Ball spin affects the oil volume fraction. In this paper, the coupled level set volume of fluid (CLSVOF) method is used to track the oil-air two-phase flow inside the ball bearing with under-race lubrication. The influence of various factors on the oil volume fraction inside the ball bearing with under-race lubrication is investigated, particularly rotating speeds, inlet velocity and the size of oil supply apertures under the inner ring. The influence of the ball spinning is analyzed separately. The result demonstrates that, on account of the centrifugal force, lubricating oil is located more on the outer ring raceway at rotational speeds of 5000 r/min, 10,000 r/min, 15,000 r/min and 20,000 r/min. The oil volume fraction inside the bearing gradually increases at an oil inlet velocity of 5 m/s, 10 m/s and 15 m/s. The circumferential distribution of oil is also similar. As the diameter of the oil supply aperture increases from 1.5 mm to 2 mm, the oil volume fraction increases inside the ball bearing. However, the oil volume fraction slightly decreases from 2 mm to 2.5 mm of oil supply aperture diameter. Ball spin does not affect the circumferential distribution trend of the lubricating oil, but slightly reduces the oil volume fraction. Furthermore, ball spin causes the surface fluid to rotate around its rotation axis and increases the speed.

1714 Investigation of Flow Distributions in Centrifugal Impeller Developed for Air-water Two-phase Flow Operation by EFD and CFD Analysis

2008 ◽  
Vol 2008.2 (0) ◽  
pp. 69-70
Author(s):  
Naoki MATSUSHITA ◽  
Tomomichi HASUI ◽  
Akinori FURUKAWA ◽  
Satoshi WATANABE ◽  
Kusuo OKUMA
Keyword(s):  
Two Phase Flow ◽  
Centrifugal Impeller ◽  
Phase Flow ◽  
Cfd Analysis ◽  
Two Phase

scholarly journals Reproducibility of Gaseous Phase Area on Journal Bearing Utilizing Multi-Phase Flow CFD Analysis under Flooded and Starved Lubrication Conditions

Lubricants ◽  
2019 ◽  
Vol 7 (9) ◽  
pp. 74 ◽  
Author(s):  
Masayuki Ochiai ◽  
Fuma Sakai ◽  
Hiromu Hashimoto
Keyword(s):  
Surface Tension ◽  
Vapor Pressure ◽  
Gaseous Phase ◽  
Journal Bearing ◽  
Journal Bearings ◽  
Phase Flow ◽  
Cfd Analysis ◽  
Two Phase ◽  
Starved Lubrication ◽  
Lubrication Conditions

It is important to predict the gaseous phase area of journal bearing. However, a detailed calculation method for such gaseous phase areas has not yet been proposed. In this study, the gaseous-phase areas in small bore journal bearings under flooded and starved lubrication conditions are analyzed in terms of the computational fluid dynamics (CFD) of two-phase flow while using a volume of fluid (VOF) method. Furthermore, the influence of surface tension and vapor pressure conditions were investigated, and the analytical and experimental results were compared. The analytical results of VOF for vapor pressure and surface tension were observed to be consistent with the experimental observations under both flooded and starved lubrication conditions. Furthermore, under starved lubrication condition, the analytical results agree well with the observed results for the interface of the oil film and cavitation upon the rupture of the oil film. While using these results, CFD analysis of the two-phase flow of the VOF can be conducted in terms of vapor pressure and surface tension to estimate the gaseous-phase areas of journal bearings under flooded and starved lubrication conditions.

SIMULATION OF A TWO PHASE FLOW BY CFD: ANALYSIS OF THE COMPUTATIONAL METHOD

1999 ◽  
Vol 173 (1) ◽  
pp. 197-214 ◽  
Author(s):  
S. S. PANDIELLA ◽  
L. A. GARCÍA ◽  
M. DÍAZ ◽  
C. WEBB
Keyword(s):  
Two Phase Flow ◽  
Computational Method ◽  
Phase Flow ◽  
Cfd Analysis ◽  
Two Phase

CFD Analysis of Two-Phase Flow in a Solid-Liquid Hydrocyclone

2011 ◽  
Vol 130-134 ◽  
pp. 3640-3643
Author(s):  
Ding Feng ◽  
Si Huang ◽  
Li Luo ◽  
Wei Guo Ma
Keyword(s):  
Two Phase Flow ◽  
Volume Fraction ◽  
Particle Volume Fraction ◽  
Phase Flow ◽  
Cfd Analysis ◽  
Particle Volume ◽  
Two Phase ◽  
Ansys Cfx ◽  
Optimizing Design ◽  
Solid Liquid

This paper presents a performance analysis of a solid-liquid hydrocyclone using Ansys-CFX software. Based on the simulation, the influence of particle volume fraction of feed flow, mean diameter of particles and viscosity of liquid phase on the two-phase flow and separating performance has been investigated for optimizing design.

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