Smoke-wire flow visualization of the near-wake region behind a circular disc at low Reynolds numbers

1994 ◽  
Vol 17 (4) ◽  
pp. 259-266 ◽  
Author(s):  
R. F. Huang ◽  
C. F. Chen ◽  
C. L. Lin ◽  
G. M. Bear
Keyword(s):  
Flow Visualization ◽  
Reynolds Numbers ◽  
Circular Disc ◽  
Wake Region ◽  
Near Wake ◽  
Low Reynolds Numbers ◽  
Low Reynolds

S0504-1-5 Flow visualization and velocity measurement of a two-dimensional jet at low Reynolds numbers

2009 ◽  
Vol 2009.2 (0) ◽  
pp. 173-174
Author(s):  
Shohei NAMAITA ◽  
Jyunya KOIWAI ◽  
Yuki MUTOU ◽  
Akinori MURAMATSU ◽  
Tomohisa OHTAKE ◽  
...  
Keyword(s):  
Flow Visualization ◽  
Velocity Measurement ◽  
Reynolds Numbers ◽  
Two Dimensional ◽  
Low Reynolds Numbers ◽  
Low Reynolds

Hydrogen bubble flow visualization at low Reynolds numbers.

AIAA Journal ◽  
1969 ◽  
Vol 7 (8) ◽  
pp. 1635-1637 ◽  
Author(s):  
FREDERICK W. ROOS ◽  
WILLIAM W. WILLMARTH
Keyword(s):  
Flow Visualization ◽  
Reynolds Numbers ◽  
Bubble Flow ◽  
Hydrogen Bubble ◽  
Low Reynolds Numbers ◽  
Low Reynolds

A note on bluff body vortex formation

1995 ◽  
Vol 284 ◽  
pp. 217-224 ◽  
Author(s):  
Owen M. Griffin
Keyword(s):  
Bluff Body ◽  
Vortex Formation ◽  
Reynolds Numbers ◽  
Initial Position ◽  
Bluff Bodies ◽  
Near Wake ◽  
Formation Region ◽  
Low Reynolds Numbers ◽  
Region Length ◽  
Low Reynolds

Green & Gerrard (1993) have presented in a recent paper the results of experiments to measure the distribution of vorticity in the near wake of a circular cylinder at low Reynolds numbers (up to Re = 220). They also compared the various definitions of the vortex formation region length which have been proposed by Gerrard (1966), Griffin (1974), and others for both high and low Reynolds numbers. The purpose of this note is to expand the work of Green & Gerrard, and to further their proposition that the end of the vortex formation region at all Reynolds numbers mark both the initial position of the fully shed vortex and the location at which its strength is a maximum. The agreement discussed here between several definitions for the formation region length will allow further understanding to be gained from investigations of the vortex wakes of stationary bluff bodies, and the wakes of oscillating bodies as well.

scholarly journals Flow visualization over a thick blunt trailing-edge airfoil with base cavity at low Reynolds numbers using PIV technique

2016 ◽  
Vol 20 (4) ◽  
pp. 695-710 ◽  
Author(s):  
Gholamhossein Taherian ◽  
Mahdi Nili-Ahmadabadi ◽  
Mohammad Hassan Karimi ◽  
Mohammad Reza Tavakoli
Keyword(s):  
Flow Visualization ◽  
Reynolds Numbers ◽  
Trailing Edge ◽  
Low Reynolds Numbers ◽  
Blunt Trailing Edge ◽  
Piv Technique ◽  
Base Cavity ◽  
Low Reynolds

Vorticity measurements in the near wake of a circular cylinder at low Reynolds numbers

1993 ◽  
Vol 246 ◽  
pp. 675-691 ◽  
Author(s):  
R. B. Green ◽  
J. H. Gerrard
Keyword(s):  
Reynolds Number ◽  
Vortex Shedding ◽  
Bluff Body ◽  
Low Reynolds Number ◽  
Reynolds Numbers ◽  
Near Wake ◽  
Low Reynolds Numbers ◽  
Region Length ◽  
Low Reynolds ◽  
Definition Of

The technique of the particle streak method has been applied to the study of bluff-body wakes at low Reynolds number. Vorticity and shear stress were measured to an accuracy of 15–20%. The vortex shedding cycles at Reynolds number of 73 and 226 are shown and the differences between the two are highlighted. Quantitative descriptions of the previously described vortex splitting phenomenon in the near wake are made, which leads to a description of the vortex shedding mechanism at low Reynolds number. The definition of low-Reynolds-number formation region length is examined. The strength of shed vortices obtained from integration of the vorticity is compared with directly measured vortex strengths and with the results of two-dimensional numerical analysis.

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