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Capillary dynamics of drops and bubb...

Bird, James Chandler.

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Capillary dynamics of drops and bubbles: Splashing, wetting, electrocoalescence, inverse coarsening, and thin films.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Capillary dynamics of drops and bubbles: Splashing, wetting, electrocoalescence, inverse coarsening, and thin films./
Author:	Bird, James Chandler.
Description:	126 p.
Notes:	Source: Dissertation Abstracts International, Volume: 71-07, Section: B, page: 4464.
Contained By:	Dissertation Abstracts International71-07B.
Subject:	Applied Mechanics. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3414637
ISBN:	9781124080888

Capillary dynamics of drops and bubbles: Splashing, wetting, electrocoalescence, inverse coarsening, and thin films.
Bird, James Chandler.

Capillary dynamics of drops and bubbles: Splashing, wetting, electrocoalescence, inverse coarsening, and thin films. - 126 p.

Source: Dissertation Abstracts International, Volume: 71-07, Section: B, page: 4464.

Thesis (Ph.D.)--Harvard University, 2010.

Small drops and the thin-films of bubbles are similar in that the surface to volume ratio is large. Consequently, capillary forces, which result from changes in the surface energy, tend to dominate the drop and bubble dynamics. For example, capillarity is responsible for breaking up a liquid jet from a faucet in a sink into a stream of individual droplets, and for coalescing these droplets into a puddle at the bottom of the sink.

ISBN: 9781124080888Subjects--Topical Terms:

1018410
Applied Mechanics.

Capillary dynamics of drops and bubbles: Splashing, wetting, electrocoalescence, inverse coarsening, and thin films.
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020 $a 9781124080888
035 $a (UMI)AAI3414637
035 $a AAI3414637
040 $a UMI $c UMI
100 1 $a Bird, James Chandler. $3 1684169
245 1 0 $a Capillary dynamics of drops and bubbles: Splashing, wetting, electrocoalescence, inverse coarsening, and thin films.
300 $a 126 p.
500 $a Source: Dissertation Abstracts International, Volume: 71-07, Section: B, page: 4464.
500 $a Adviser: Howard A. Stone.
502 $a Thesis (Ph.D.)--Harvard University, 2010.
520 $a Small drops and the thin-films of bubbles are similar in that the surface to volume ratio is large. Consequently, capillary forces, which result from changes in the surface energy, tend to dominate the drop and bubble dynamics. For example, capillarity is responsible for breaking up a liquid jet from a faucet in a sink into a stream of individual droplets, and for coalescing these droplets into a puddle at the bottom of the sink.
520 $a This dissertation identifies four situations in which a drop or a bubble exhibits unusual and perhaps counter-intuitive dynamics. The first example (Chapter 2) occurs when a drop impacts either an angled or moving dry, solid surface. Existing physical models attempt to predict the resulting dynamics, spreading or splashing, based on a variety of parameters. Yet it is unclear how these models would extend to include tangential velocity. Our high-speed experiments highlight a distinct third regime in which a fraction of the drop spreads while the other part splashes. The second example (Chapter 3) occurs when a drop contacts a wettable surface with a finite contact angle. Our high-speed experiments challenge the existing models by both showing that the spreading is inertially dominated and that the distance spread follows a power-law scaling in time where the exponent depends on the equilibrium contact angle. The third example (Chapter 4) occurs when two drops are drawn together in an electric field. When the voltage between the drops is low, the drops contact and coalesce. However, when the voltage is sufficiently high, the drops contact and then recoil. The fourth example (Chapter 5) occurs when a bubble on a liquid or solid surface ruptures. Foam coarsening theory would predict that the bubble vanishes when it pops, yet our experiments show that a ring of smaller bubbles is created from the retracting film. This inverse coarsening phenomena is a source of aerosols, and therefore may have implications for health and climate. This dissertation sets out to describe each of these four phenomena and develop plausible physical mechanisms and includes a novel computational approach (Chapter 6) to model retracting thin films.
590 $a School code: 0084.
650 4 $a Applied Mechanics. $3 1018410
650 4 $a Engineering, Mechanical. $3 783786
650 4 $a Physics, Fluid and Plasma. $3 1018402
690 $a 0346
690 $a 0548
690 $a 0759
710 2 $a Harvard University. $3 528741
773 0 $t Dissertation Abstracts International $g 71-07B.
790 1 0 $a Stone, Howard A., $e advisor
790 $a 0084
791 $a Ph.D.
792 $a 2010
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3414637