0
TECHNICAL PAPERS: Fluids/Heat/Transport

Low Reynolds Number Viscous Flow in an Alveolated Duct

[+] Author and Article Information
Alexander Karl

Institut für Thermodynamik der Luft- und Raumfahrt, University of Stuttgart, Stuttgart, 70550, Germany

Frank S. Henry

School of Engineering and Mathematical Sciences, City University, London, U.K., EC1 V0HB

Akira Tsuda

Physiology Program, Department of Environmental Health, Harvard School of Public Health, Boston, MA 02115

J Biomech Eng 126(4), 420-429 (Sep 27, 2004) (10 pages) doi:10.1115/1.1784476 History: Received May 24, 2003; Revised December 06, 2003; Online September 27, 2004
Copyright © 2004 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Alveolated duct geometry. a) Typical section of duct. b) Detail of unit cell, where c=duct diameter, t=plate thickness, d=orifice diameter and w=distance between each pair of plates. c) Sample computational grid.
Grahic Jump Location
Details of the experimental setup: schematic diagram of rig including fluid reservoir for steady state gravity column driven flow; photograph of the measuring section; and segments used to setup different geometries.
Grahic Jump Location
Experimental results (raw image) for flow in the cavity within geometry Set 6 at a Reynolds number of Re=0.48. The flow direction is given by the arrow.
Grahic Jump Location
Experimental flow details for geometry Set 1 at a Reynolds number of 0.648 evaluated with the PIV method. a) Three typical pathlines and b) Corresponding streamlines and velocity vectors (magnitude, cm/s; angle, degrees): P1 (3.95, 0.5), P2 (1.60,−15.0), P3 (1.65, 6.0), P4 (1.55, 12.0), P5 (0.75,−38.0), P6 (0.55,−23.0), P7 (0.50,−11.0), P8 (0.51,−4.0), P9 (0.58, 3.0), P10 (0.50, 9.0), P11 (0.50, 13.5), P12 (0.60, 31.0), P13 (0.80, 41.5).
Grahic Jump Location
Experimental (a) and predicted (b) streamlines for Set 1 geometry (see Table 1) and Re=0.648.RA=0.17.
Grahic Jump Location
Experimental (a) and predicted (b) streamlines for Set 2 geometry (see Table 1) and Re=0.648.RA=0.25.
Grahic Jump Location
Experimental (a) and predicted (b) streamlines for Set 3 geometry (see Table 1) and Re=0.48.RA=0.50.
Grahic Jump Location
Experimental (a) and predicted (b) streamlines for Set 4 geometry (see Table 1) and Re=0.648.RA=0.50.
Grahic Jump Location
Experimental (a) and predicted (b) streamlines for Set 5 geometry (see Table 1) and Re=0.96.RA=0.67.
Grahic Jump Location
Experimental (a) and predicted (b) streamlines for Set 6 geometry (see Table 1) and Re=0.48.RA=1.00.
Grahic Jump Location
Particle positions at various times. Set 5 geometry (see Table 1) and Re=0.96. (a) Experimental data at time intervals, Δt, of 0.08s for the top line, 0.2s for the next lower line, 1.0s for the line just above the cavity opening and 1.0s for the closed line within the cavity. (b) Predicted data at time intervals, Δt, of 0.03s for the top line, 0.15s for the next lower line, 0.3s for the line just above the cavity opening and 3.0s for the closed line within the cavity. Note that the difference in time intervals for the experiments and the predictions, reported above, is simply a consequence of the time increments permitted by the experimental recording equipment and the time step necessary for accurate predictions of the particle tracks.
Grahic Jump Location
Change of the ratio of cavity flow rate, QC, to central duct flow, QD, with Reynolds number, Re, for Set 5 geometry.
Grahic Jump Location
Change of the ratio of cavity flow rate, QC, to central duct flow, QD, with cavity aspect ratio, RA.
Grahic Jump Location
Change of volume flow rate ratio, QC/QD and the square of the diameter ratio d/c with cavity aspect ratio, RA.
Grahic Jump Location
Variation of time taken for a particle to traverse one closed pathway in the cavity with radial distance for Set 5 geometry and Re=0.048.
Grahic Jump Location
Predicted radial and axial velocity profiles (both at same scale) in the cavity for Set 5 geometry and Re=0.048. The axial profile is positioned at the center of the lower wall of the cavity and the radial profile is positioned at the mid-height point of the vertical cavity wall.

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In