scholarly journals Withdrawing a non-Newtonian fluid by a moving inclined plate with account for the near-wall split effect

2021 ◽  
Vol 65 (6) ◽  
pp. 755-763
Author(s):  
V. I. Baikov ◽  
A. A. Kovalevskaya ◽  
A. D. Chorny
Keyword(s):  
Newtonian Fluid ◽  
Wall Slip ◽  
Viscoplastic Fluid ◽  
Velocity Range ◽  
Inclined Plate ◽  
Split Effect ◽  
Withdrawal Velocity ◽  
Inclined Surface ◽  
Physical Principles ◽  
Near Wall

A fluid withdrawn by a moving inclined surface with account for the near-wall slip effect is analyzed theoretically. A non-Newtonian fluid task is stated in general form. The solving of this task enables revealing the basic physical principles and mechanisms of the process over the entire withdrawal velocity range realized in practice. The case of withdrawing a finite yield stress viscoplastic fluid is considered.

scholarly journals Capturing a non-Newtonian fluid by a moving inclined plate

2020 ◽  
Vol 63 (6) ◽  
pp. 761-768
Author(s):  
V. I. Baikov ◽  
A. D. Chorny
Keyword(s):  
Yield Stress ◽  
Newtonian Fluid ◽  
Entire Range ◽  
Viscoplastic Fluid ◽  
Inclined Plate ◽  
Inclined Surface ◽  
Physical Principles

Fluid capturing by a moving inclined surface is analyzed theoretically. A task for non-Newtonian fluid is stated in general form. The solving of this task enables revealing the basic physical principles and the mechanisms of the fluid withdrawal process over an entire range of withdrawal velocities realized in practice. The case of withdrawal of finite yield stress viscoplastic fluid is considered.

1213 Near-wall motion of non-Newtonian fluid observed by evanescent light in a microchannel

2013 ◽  
Vol 2013.51 (0) ◽  
pp. _1213-1_-_1213-2_
Author(s):  
Yoshihiko NAKA ◽  
Keiichiro AKAZAWA ◽  
Kazunori YASUDA ◽  
Yukiharu IWAMOTO ◽  
Motosuke SOGO
Keyword(s):  
Newtonian Fluid ◽  
Wall Motion ◽  
Evanescent Light ◽  
Near Wall

A Comparison of Measuring Devices Used to Prevent Wall Slip in Viscosity Measurements of Metallic Suspensions

2008 ◽  
Vol 141-143 ◽  
pp. 307-312 ◽  
Author(s):  
Michael Modigell ◽  
Lars Pape
Keyword(s):  
Wall Slip ◽  
Metal Alloys ◽  
Free Layer ◽  
Rheological Measurements ◽  
Measuring Devices ◽  
Slip Effects ◽  
Semi Solid ◽  
The One ◽  
Rotating Rods ◽  
Near Wall

When analysing semi-solid metal alloys or any other suspension in rheometers a major problem is related to wall slip effects which lead to an underestimation of the suspensions viscosity. Using smooth rotating rods in rotational rheometry for analysing suspensions a thin particle free layer of liquid is formed at the surface of the rod due to near-wall segregation. Thus, mainly the viscosity of this layer is measured which is much lower than the one of the bulk phase. Kiljanski [1] proposed a method for rotational rheometers to recalculate such measurements to get viscosity values without slip effects. A device-related change to minimize wall slip is the use of rotating rods with grooved surfaces. Therewith near-wall mixing is produced to destroy the particle free layer. Alternatively, the use of multiple blade vanes is proposed in the literature to avoid wall slip. The differences of the two measuring devices (grooved, vane) are discussed at the example of measurements for a low melting tin-lead alloy in the semi-solid state. It is figured out whether a vane geometry is also suitable to be applied for rheological measurements on metallic suspensions.

Extrusion molding of polymers with allowance for near-wall slip

2011 ◽  
Vol 47 (3-4) ◽  
pp. 231-237 ◽  
Author(s):  
A. S. Sakharov ◽  
V. I. Sivetskii ◽  
A. L. Sokolskii
Keyword(s):  
Wall Slip ◽  
Near Wall
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