東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

Transport of microscopic particles i...

Laker, Travis Shane.

Linked to FindBook

Google Book

Amazon

博客來

Transport of microscopic particles in microchannels and microbubbles.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Transport of microscopic particles in microchannels and microbubbles./
Author:	Laker, Travis Shane.
Description:	188 p.
Notes:	Source: Dissertation Abstracts International, Volume: 64-03, Section: B, page: 1455.
Contained By:	Dissertation Abstracts International64-03B.
Subject:	Engineering, Mechanical. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3084977

Transport of microscopic particles in microchannels and microbubbles.
Laker, Travis Shane.

Transport of microscopic particles in microchannels and microbubbles. - 188 p.

Source: Dissertation Abstracts International, Volume: 64-03, Section: B, page: 1455.

Thesis (Ph.D.)--Georgia Institute of Technology, 2003.

The effect of microscopic particles on hydrodynamics and heat transfer in microchannels subject to turbulent flow was investigated, and a Monte-Carlo simulation of the transport of microscopic particles in spherical and oscillating bubbles was performed.Subjects--Topical Terms:

783786
Engineering, Mechanical.

Transport of microscopic particles in microchannels and microbubbles.
LDR:03448nmm 2200313 4500 001 1855514
005 20040624070806.5
008 130614s2003 eng d
035 $a (UnM)AAI3084977
035 $a AAI3084977
040 $a UnM $c UnM
100 1 $a Laker, Travis Shane. $3 1943322
245 1 0 $a Transport of microscopic particles in microchannels and microbubbles.
300 $a 188 p.
500 $a Source: Dissertation Abstracts International, Volume: 64-03, Section: B, page: 1455.
500 $a Director: S. Mostafa Ghiaasiaan.
502 $a Thesis (Ph.D.)--Georgia Institute of Technology, 2003.
520 $a The effect of microscopic particles on hydrodynamics and heat transfer in microchannels subject to turbulent flow was investigated, and a Monte-Carlo simulation of the transport of microscopic particles in spherical and oscillating bubbles was performed.
520 $a The anomalous and opposing trends in published data dealing with turbulent flow friction factor and heat transfer coefficient in microchannels, and their apparent disagreement with macroscale correlations, are investigated. It is shown that the modification of turbulent eddy diffusivities, consistent with the way suspended particles may modify turbulence, can explain the observed higher-than-expected heat transfer coefficients in some data. It is therefore suggested that suspended microscopic particles may be a major contributor to the aforementioned inconsistencies and disagreements in some of the published data.
520 $a The dynamic transport and removal of suspended microscopic particles in spherical and oscillating bubbles rising in quiescent liquid pools are modeled based on a hybrid Eulerian-Monte-Carlo numerical analysis. The bubble internal circulation is obtained by assuming that it is similar to Hill's vortex flow for non-oscillating bubbles. The transport of particles is rendered by a Monte-Carlo analysis, based on the simultaneous solution of the equations of motion for a large number of particles in the LaGrangian frame. The particle equations of motion account for the following displacement mechanisms: sedimentation, inertia, convection, and Brownian (modeled by an appropriately defined random force). For non-oscillating microbubbles, parametric calculations are presented and compared with relevant Eulerian models, including the widely used method of Fuchs (1964). The strength of bubble internal circulation is shown to be a key parameter affecting the particles.
520 $a Vibrating spherical bubbles are assumed to undergo second-mode shape oscillations while supporting laminar internal circulation. Parametric calculations are presented to examine the effect of oscillations on particle removal rate from bubbles, and its sensitivity to particle and bubble size. The results show that oscillations enhance the particle removal rate from bubbles. The enhancement effect increases with reduction of the particle diameter, increased bubble diameter, and increased oscillation amplitude. For sub-micron particles suspended in mm-size bubbles, for example, oscillations could increase particle removal rates by orders of magnitude.
590 $a School code: 0078.
650 4 $a Engineering, Mechanical. $3 783786
650 4 $a Engineering, Nuclear. $3 1043651
650 4 $a Engineering, Environmental. $3 783782
690 $a 0548
690 $a 0552
690 $a 0775
710 2 0 $a Georgia Institute of Technology. $3 696730
773 0 $t Dissertation Abstracts International $g 64-03B.
790 1 0 $a Ghiaasiaan, S. Mostafa, $e advisor
790 $a 0078
791 $a Ph.D.
792 $a 2003
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3084977