Flow structure in the near-wake of single solid and fluid objects as measured by particle image velocimetry

Author

Hidekazu No

Abstract

"Recently, simulations of bubbly flow and other multiphase dispersed flows have been investigated using simplified configurations, as well as low Reynolds numbers. In the near future it will become necessary to compare data from experiments and simulations not only for basic flow configurations, but also for more complex configurations. The objective of this research was to experimentally obtain fundamental knowledge of the near-wake flow structure of an air bubble, an oil droplet, a solid object, and a hollowed cap with an air bubble or an oil droplet attached underneath. All objects were separately suspended in the downward channel flow of de-ionized water, except in the case of the single oil droplet, for which the oil contamination was present in very small concentrations. The vertical test section was 1000 mm long, and square in crosssection (80 mmx80 mm). The objects were ellipsoidal in shape with approximately an 11.5 mm equivalent diameter (Deq) and 0.8ml corresponding volume. The Reynolds number for the flow was based on the Deq and an average downward flow velocity of approximately 25 emfs (12 emfs for the oil droplet); the range being Reoeq = 2450 to 2890 (1040 for the oil droplet). Only in the case of the bubble and the case of the oil droplet, the Eotvos number was 17.80 < Eo < 17.85 and 3.32 s Eo :s; 3.36; Weber number was 9.85

Advisor(s)

Tokuhiro, Akira

Committee Member(s)

Mueller, Gary Edward, 1954-
Isaac, Kakkattukuzhy M.

Department(s)

Nuclear Engineering and Radiation Science

Degree Name

M.S. in Nuclear Engineering

Comments

Accompanying CD-ROM, available at Missouri S&T Library, contains video files from Animation Analysis, page 55.
System requirements: IBM PC with Windows Explorer and Windows Media Player.

Publisher

University of Missouri--Rolla

Publication Date

Fall 2003

Pagination

xv, 129 pages, CD-ROM

Note about bibliography

Includes bibliographical references (pages 124-128)

Rights

© 2003 Hidekazu No, All rights reserved.

Document Type

Thesis - Restricted Access

File Type

text

Language

English

Subject Headings

Fluid dynamicsWakes (Fluid dynamics)Particle image velocimetry

Thesis Number

T 8396

Print OCLC #

55084012

Recommended Citation

No, Hidekazu, "Flow structure in the near-wake of single solid and fluid objects as measured by particle image velocimetry" (2003). Masters Theses. 2419.
https://scholarsmine.mst.edu/masters_theses/2419