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An analysis of interfacial waves and...

Rensselaer Polytechnic Institute.

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An analysis of interfacial waves and air ingestion mechanisms .

Record Type:	Language materials, printed : Monograph/item
Title/Author:	An analysis of interfacial waves and air ingestion mechanisms ./
Author:	Galimov, Azat.
Description:	97 p.
Notes:	Advisers: Richard T. Lahey, Jr.; Kenneth E. Jansen.
Contained By:	Dissertation Abstracts International68-10B.
Subject:	Engineering, Marine and Ocean. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3286321
ISBN:	9780549286844

An analysis of interfacial waves and air ingestion mechanisms .
Galimov, Azat.

An analysis of interfacial waves and air ingestion mechanisms . - 97 p.

Advisers: Richard T. Lahey, Jr.; Kenneth E. Jansen.

Thesis (Ph.D.)--Rensselaer Polytechnic Institute, 2007.

This research was focused on developing analytical methods with which to derive the functional forms of the various interfacial forces in two-fluid models [Galimov et al., 2004], and on the Direct Numerical Simulations (DNS) of traveling breaking waves and plunging liquid jets.

ISBN: 9780549286844Subjects--Topical Terms:

1019064
Engineering, Marine and Ocean.

An analysis of interfacial waves and air ingestion mechanisms .
LDR:03353nam 2200337 a 45 001 852936
005 20100701
008 100701s2007 ||||||||||||||||| ||eng d
020 $a 9780549286844
035 $a (UMI)AAI3286321
035 $a AAI3286321
040 $a UMI $c UMI
100 1 $a Galimov, Azat. $3 1019063
245 1 3 $a An analysis of interfacial waves and air ingestion mechanisms .
300 $a 97 p.
500 $a Advisers: Richard T. Lahey, Jr.; Kenneth E. Jansen.
500 $a Source: Dissertation Abstracts International, Volume: 68-10, Section: B, page: 6726.
502 $a Thesis (Ph.D.)--Rensselaer Polytechnic Institute, 2007.
520 $a This research was focused on developing analytical methods with which to derive the functional forms of the various interfacial forces in two-fluid models [Galimov et al., 2004], and on the Direct Numerical Simulations (DNS) of traveling breaking waves and plunging liquid jets.
520 $a Analytical results are presented for a stable stratified wavy two-phase flow and the associated interfacial force densities of a two-fluid model. In particular, the non-drag interfacial force density [Drew & Passman, 1998], the Reynolds stress tensor, and the term ( p&d5;cli -pcl)∇alphacl, which drives surface waves, were derived, where p&d5;cli is interfacial average pressure, pcl is the average pressure, and alphacl is the volume fraction of the continuous liquid phase. These functional forms are potentially useful for developing two-fluid model closure relations for computational multiphase fluid dynamics (CMFD) numerical solvers. Moreover, it appears that this approach can be generalized to other flow regimes (e.g., annular flows). A comparison of the analytical and ensemble-averaged DNS results show good agreement, and it appears that this approach can be used to develop phenomenological flow-regime-specific closure laws for two-fluid models [Lahey & Drew, 2004], [Lahey, 2005].
520 $a A successful 2-D DNS of breaking traveling waves was performed. These calculations had periodic boundary conditions and the physical parameters for air/water flow at atmospheric pressure, including a liquid/gas density ratio of 1,000 and representative surface tension and viscosities.
520 $a Detailed 3-D DNS was also made for a plunging liquid jet. The processes of forming the liquid jet, the associated air cavity, capturing an initial large donut-shaped air bubble, and developing and breaking-up this bubble into smaller bubbles due to liquid shear, were shown. These simulations showed that the inertia of the liquid jet initially depressed the pool's surface and the toroidal liquid eddy formed subsequently resulted in air cavity collapse which, in turn, entrained air into the liquid pool from the annular region formed around the liquid jet. It is significant that the observed physics of the air entrainment processes is quite different from that previously proposed [Zhu et al., 2000], [Bonetto et al., 1994], [Lorenceau et al., 2007].
590 $a School code: 0185.
650 4 $a Engineering, Marine and Ocean. $3 1019064
650 4 $a Physics, Fluid and Plasma. $3 1018402
650 4 $a Physics, Nuclear. $3 1019065
690 $a 0547
690 $a 0610
690 $a 0759
710 2 $a Rensselaer Polytechnic Institute. $3 1019062
773 0 $t Dissertation Abstracts International $g 68-10B.
790 $a 0185
790 1 0 $a Jansen, Kenneth E., $e advisor
790 1 0 $a Lahey, Richard T., Jr., $e advisor
791 $a Ph.D.
792 $a 2007
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3286321