Effects of aspect ratio on the drag of a wall-mounted finite-length cylinder in subcritical and critical regimes

Effects of aspect ratio on the drag of a wall-mounted finite-length cylinder in subcritical and... The effect of cylinder aspect ratio (≡H/d, where H is the cylinder height or length, and d is the cylinder diameter) on the drag of a wall-mounted finite-length circular cylinder in both subcritical and critical regimes is experimentally investigated. Two cases are considered: a smooth cylinder submerged in a turbulent boundary layer and a roughened cylinder immersed in a laminar uniform flow. In the former case, the Reynolds number Re d (≡U ∞ d/ν, with U ∞ being the free-stream velocity and ν the fluid viscosity) was varied from 2.61 × 104 to 2.87 × 105, and two values of H/d (2.65 and 5) were examined; in the latter case, Re d  = 1.24 × 104–1.73 × 105 and H/d = 3, 5 and 7. In the subcritical regime, both the drag coefficient C D and the Strouhal number St are smaller than their counterparts for a two-dimensional cylinder and reduce monotonously with decreasing H/d. The presence of a turbulent boundary layer causes an early transition from the subcritical to critical regime and considerably enlarges the Re d range of the critical regime. No laminar separation bubble occurs on the finite-length cylinder immersed in the turbulent boundary layer, and consequently, the discontinuity is not observed in the C D–Re d and St–Re d curves. In the roughened cylinder case, the Re d range of the critical regime grows gradually with decreasing H/d, while the C D crisis becomes less obvious. In both cases, H/d has a negligible effect on the critical value of Re d at which transition occurs from the subcritical to critical regime. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Experiments in Fluids Springer Journals

Effects of aspect ratio on the drag of a wall-mounted finite-length cylinder in subcritical and critical regimes

Loading next page...
 
/lp/springer_journal/effects-of-aspect-ratio-on-the-drag-of-a-wall-mounted-finite-length-z0RjV9Yxxk
Publisher
Springer-Verlag
Copyright
Copyright © 2012 by Springer-Verlag
Subject
Engineering; Engineering Fluid Dynamics; Engineering Thermodynamics, Heat and Mass Transfer; Fluid- and Aerodynamics
ISSN
0723-4864
eISSN
1432-1114
D.O.I.
10.1007/s00348-012-1299-z
Publisher site
See Article on Publisher Site

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Unlimited reading

Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.

Stay up to date

Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.

Organize your research

It’s easy to organize your research with our built-in tools.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

Monthly Plan

  • Read unlimited articles
  • Personalized recommendations
  • No expiration
  • Print 20 pages per month
  • 20% off on PDF purchases
  • Organize your research
  • Get updates on your journals and topic searches

$49/month

Start Free Trial

14-day Free Trial

Best Deal — 39% off

Annual Plan

  • All the features of the Professional Plan, but for 39% off!
  • Billed annually
  • No expiration
  • For the normal price of 10 articles elsewhere, you get one full year of unlimited access to articles.

$588

$360/year

billed annually
Start Free Trial

14-day Free Trial