scholarly journals Phenomenological model of propagation of the elastic waves in a fluid-saturated porous solid with nonzero boundary slip velocity

2002 ◽  
Vol 112 (3) ◽  
pp. 843-849 ◽  
Author(s):  
David Tsiklauri
Keyword(s):  
Phenomenological Model ◽  
Elastic Waves ◽  
Slip Velocity ◽  
Porous Solid ◽  
Boundary Slip ◽  
Nonzero Boundary

scholarly journals Comparison of the Influences of Surface Texture and Boundary Slip on Tribological Performances

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Qiyin Lin ◽  
Baotong Li
Keyword(s):  
Surface Texture ◽  
Slip Velocity ◽  
Structure Parameters ◽  
Textured Surfaces ◽  
Slider Bearing ◽  
Boundary Slip ◽  
Surface Textures ◽  
Slip Surfaces ◽  
Texture Structure ◽  
The Relationship

Close attentions have been widely paid to the engineering textured and slip surfaces for improving bearing tribological performances. Comparison studies on the tribological characteristics of slip and textured surfaces are carried out in this work. The analysis results point out that the influences of surface texture and boundary slip on tribological performances of slider bearing are strongly similar. For the determinate surface textures, there is one and only value of slip velocity to make the tribological performances of textured and slip surfaces in agreement. The corresponding relation between the slip velocity and the texture structure parameters is also obtained, and the size of slip velocity is directly related to the texture geometry parameters including its position parameters. This study will help us to further understand the relationship between boundary slip and surface texture and also the slip phenomenon.

Inverse Problems in Non-Newtonian Electrokinetic Flows in Microchannel Networks

Volume 3 ◽  
2004 ◽  
Author(s):  
William B. Zimmerman ◽  
Julia M. Rees ◽  
Thomas J. Craven
Keyword(s):  
Slip Velocity ◽  
Pressure Profile ◽  
Carreau Fluid ◽  
Boundary Slip ◽  
Electrokinetic Flow ◽  
Nonlinear Viscosity ◽  
Relaxation Time Scale ◽  
Electrokinetic Flows ◽  
Electrokinetic Motion ◽  
End Wall

A model of the electrokinetic flow of a fluid with a nonlinear viscosity of the Carreau type is simulated by finite element methods in a microchannel T-junction. The simulations accelerate the fluid from rest using the model for boundary slip velocity imposed due to a Debye double layer motion proposed by Zimmerman and MacInnes (2003). The simulations demonstrate an interval of the transient evolution of the end wall pressure profile that scales proportionally with the Reynolds number. The shape of the steady state profile is shown to be sensitive to the relaxation time scale characterizing the shear rate dependence of a Carreau fluid. Consequently, this flow regime can be taken as a paradigm viscometric flow for electrokinetic motion.

scholarly journals Thermal Effect on Elastic Waves of Anisotropic Saturated Porous Solid

2011 ◽  
Vol 2011 ◽  
pp. 1-5
Author(s):  
S. H. Guo
Keyword(s):  
Thermal Effect ◽  
Elastic Waves ◽  
Anisotropic Media ◽  
Mass Conservation ◽  
Porous Solid ◽  
Porous Solids ◽  
Elastic Model ◽  
Coupling Coefficients ◽  
Motion Equations ◽  
Standard Space

The motion equations of anisotropic media, coupled to the mass conservation and thermoequilibrium equations of fluid, are studied here based on the standard space of physical presentation for thermoelastic dynamics of anisotropic saturated porous solids. By introducing a new compressible thermo-elastic model, a set of uncoupled equations of elastic waves are deduced. The results show that the elastic waves and speeds of elastic waves are affected by both anisotropic subspaces of solids and thermal and compressive coupling coefficients between fluid and solid. Based on these laws, we discuss the propagation behaviour of elastic waves for various anisotropic solids.

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