Journal
JOURNAL OF FLUIDS AND STRUCTURES
Volume 51, Issue -, Pages 211-224Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jfluidstructs.2014.07.017
Keywords
Slip boundary; Circular cylinder; Drag reduction
Categories
Funding
- Major State Basic Research Development Program of China [2011CB013101]
- National Natural Science Foundation of China (NSFC) [11225208, 11172001, 11302006]
- Alexander von Humboldt (AvH) foundation (Germany)
Ask authors/readers for more resources
A slip boundary has been shown to have a significant impact on flow past bluff bodies. In this work and using a circular cylinder as a model system, the effects of various slip configurations on the passing flow are investigated. A theoretical analysis using matched-asymptotic expansion is first performed in the small-Reynolds number regime following Stokes and Oseen. A slip boundary condition is shown to lead to only higher-order effects (similar to 1/ln(Re)) on the resulting drag coefficient. For higher Reynolds numbers (100-500), the effects of five types of symmetric slip boundary conditions, namely, no slip, fore-side slip, aft-side slip, flank slip, and all slip on the flow field and pertinent parameters are investigated with numerical simulations. Detailed results on the flow structure and force distribution are presented. Flank slip is found to have the best effect for drag reduction with comparable coverage of slip area. For asymmetric slip distributions, torque and lift are found to generally occur. (C) 2014 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available