Describing the Asymptotic Behavior of a Low-Viscosity Fluid in an Elliptical Plane with a Moving Boundary

2020 ◽  
Keyword(s):  
Asymptotic Behavior ◽  
Moving Boundary ◽  
Low Viscosity ◽  
Viscosity Fluid

scholarly journals Nonlinear dynamic analysis of low viscosity fluid-lubricated tilting-pad journal bearing for different design parameters

Friction ◽  
2019 ◽  
Vol 8 (5) ◽  
pp. 930-944 ◽  
Author(s):  
Yingze Jin ◽  
Fei Chen ◽  
Jimin Xu ◽  
Xiaoyang Yuan
Keyword(s):  
Dynamic Analysis ◽  
Nonlinear Dynamic ◽  
Load Capacity ◽  
Nonlinear Dynamic Analysis ◽  
Design Parameters ◽  
Clearance Ratio ◽  
Low Viscosity ◽  
Nonlinear Design ◽  
Tilting Pad ◽  
Viscosity Fluid

Abstract To reveal nonlinear dynamic rules of low viscosity fluid-lubricated tilting-pad journal bearings (TPJBs), the effects of design parameters on journal center orbits and dynamic minimum film thicknesses of water-lubricated TPJBs with and without static loads are investigated. The hydrodynamic bearing force used in the nonlinear dynamic analysis is an approximate analytical solution including the turbulence effect. The results reveal the methods for vibration suppression and load capacity improvement and give an optimal pivot offset and clearance ratio that can maximize the minimum film thickness. The results also show that four-pad TPJBs with loads between pads are preferred due to good dynamic performance and load capacity. This study would provide some guidance for nonlinear design of low viscosity fluid-lubricated TPJBs under dynamic loads.

Spectrum of coalescing bubbles in a low-viscosity fluid

1973 ◽  
Vol 5 (4) ◽  
pp. 637-642
Author(s):  
A. M. Golovin ◽  
A. G. Petrov
Keyword(s):  
Low Viscosity ◽  
Viscosity Fluid

Oscillating flows over periodic ripples

1990 ◽  
Vol 211 ◽  
pp. 183-209 ◽  
Author(s):  
Tetsu Hara ◽  
Chiang C. Mei
Keyword(s):  
Pure Water ◽  
Suspended Sediments ◽  
Viscous Effects ◽  
Oscillating Flows ◽  
Ambient Flow ◽  
Low Viscosity ◽  
Beach Processes ◽  
Surface Circulation ◽  
Moving Coordinate ◽  
Viscosity Fluid

Oscillating flows over periodic ripples are of practical as well as scientific interest because of their relevance to beach processes. When either the ripples are sufficiently steep or the amplitude of ambient oscillations large, streamlines of a viscous flow are no longer parallel to the ripple surface. Circulation cells are formed which can help redistribute suspended sediments. Here we study theoretically these cells for a low-viscosity fluid such as pure water over rigid ripples. In particular we have calculated cells whose dimensions are as large as the ripple wavelength and therefore represent viscous effects far above the usual Stokes boundary layer. An idea of Stuart which was originated for stationary mean circulations around a cylinder is extended here. For large ambient amplitude, large oscillating vortices drifting with the ambient flow are found by seeking the stationary cells in a moving coordinate system.

scholarly journals Flow characteristics of low viscosity fluid in submicron gap

2002 ◽  
Vol 2002.39 (0) ◽  
pp. 19-20
Author(s):  
Tomohiko SEINO ◽  
Masami MASUDA ◽  
Takanori YAZAWA
Keyword(s):  
Flow Characteristics ◽  
Low Viscosity ◽  
Viscosity Fluid
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