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Boundary conditions in the vicinity ...

Ting, Chao-lung.

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Boundary conditions in the vicinity of the contact line at a vertically oscillating plate: An experimental investigation.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Boundary conditions in the vicinity of the contact line at a vertically oscillating plate: An experimental investigation./
Author:	Ting, Chao-lung.
Description:	179 p.
Notes:	Source: Dissertation Abstracts International, Volume: 55-08, Section: B, page: 3401.
Contained By:	Dissertation Abstracts International55-08B.
Subject:	Applied Mechanics. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9501051

Boundary conditions in the vicinity of the contact line at a vertically oscillating plate: An experimental investigation.
Ting, Chao-lung.

Boundary conditions in the vicinity of the contact line at a vertically oscillating plate: An experimental investigation. - 179 p.

Source: Dissertation Abstracts International, Volume: 55-08, Section: B, page: 3401.

Thesis (Ph.D.)--University of Michigan, 1994.

To determine a suitable boundary-condition model for the contact line in oscillatory flow, a vertical plate oscillated sinusoidally in dye-laden water with an air interface is considered experimentally. Constrained by the desirability of a two-dimensional flow field and the laboratory facility, eight individual frequencies (1 to 20 Hz) each with seven different stroke amplitudes (0.5 to 6 mm) are chosen for the experimental program. The corresponding Reynolds number for each experiments varies from 1.6 to 1878.3 which is large relative to the Reynolds number in the conventional uni-directional contact-line experiments (e.g. Dussan V.'s (1974) experiments). To facilitate prediction, a high-speed video system is used to record the plate displacement, the contact-line displacement, and the dynamic behavior of the contact angle. A particle-tracking-velocimetry (PTV) technique is used to detect particle trajectories near the plate such that the boundary condition along the entire plate can be modeled. Two sets of PTV experiments are conducted. One experiment is for the stick contact-line motion, the other experiment is for the stick-slip contact-line motion.Subjects--Topical Terms:

1018410
Applied Mechanics.

Boundary conditions in the vicinity of the contact line at a vertically oscillating plate: An experimental investigation.
LDR:03139nmm 2200289 4500 001 1819046
005 20061004161442.5
008 130610s1994 eng d
035 $a (UnM)AAI9501051
035 $a AAI9501051
040 $a UnM $c UnM
100 1 $a Ting, Chao-lung. $3 1908347
245 1 0 $a Boundary conditions in the vicinity of the contact line at a vertically oscillating plate: An experimental investigation.
300 $a 179 p.
500 $a Source: Dissertation Abstracts International, Volume: 55-08, Section: B, page: 3401.
500 $a Chair: Marc Perlin.
502 $a Thesis (Ph.D.)--University of Michigan, 1994.
520 $a To determine a suitable boundary-condition model for the contact line in oscillatory flow, a vertical plate oscillated sinusoidally in dye-laden water with an air interface is considered experimentally. Constrained by the desirability of a two-dimensional flow field and the laboratory facility, eight individual frequencies (1 to 20 Hz) each with seven different stroke amplitudes (0.5 to 6 mm) are chosen for the experimental program. The corresponding Reynolds number for each experiments varies from 1.6 to 1878.3 which is large relative to the Reynolds number in the conventional uni-directional contact-line experiments (e.g. Dussan V.'s (1974) experiments). To facilitate prediction, a high-speed video system is used to record the plate displacement, the contact-line displacement, and the dynamic behavior of the contact angle. A particle-tracking-velocimetry (PTV) technique is used to detect particle trajectories near the plate such that the boundary condition along the entire plate can be modeled. Two sets of PTV experiments are conducted. One experiment is for the stick contact-line motion, the other experiment is for the stick-slip contact-line motion.
520 $a Several interesting measured contact-line phenomena are shown in the present results. Several models are developed to explain these complicated phenomena. These models explain the contact-line and contact-angle behaviors well. An expression for $\ lambda $, the dimensionless capillary coefficient (nondimensionalized by the maximum plate velocity), is formulated such that the dynamic behavior at the contact line is predicted accurately. The results from the PTV experiments show that a vortex is formed near the meniscus in the stick-slip contact-line experiment; however, in the stick contact-line experiment, no such vortex is present.
520 $a Using the present experimental results, a model is developed for the boundary condition along the vertically oscillating plate. That is, slip occurs within a specific distance from the contact line while the flow obeys the no-slip condition outside this slip region. This model is more realistic and accurate than models based upon modified, uni-directional contact-line boundary-condition formulations.
590 $a School code: 0127.
650 4 $a Applied Mechanics. $3 1018410
650 4 $a Engineering, Mechanical. $3 783786
690 $a 0346
690 $a 0548
710 2 0 $a University of Michigan. $3 777416
773 0 $t Dissertation Abstracts International $g 55-08B.
790 1 0 $a Perlin, Marc, $e advisor
790 $a 0127
791 $a Ph.D.
792 $a 1994
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9501051