The effect of slip distribution on flow past a circular cylinder

Dandan Li, Shichen Li, Yahui Xue, Yantao Yang, Weidong Su, Zhenhua Xia, Yipeng Shi, Hao Lin, Huiling Duan

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

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 (~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.

Original languageEnglish (US)
Pages (from-to)211-224
Number of pages14
JournalJournal of Fluids and Structures
Volume51
DOIs
StatePublished - Nov 1 2014

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering

Keywords

  • Circular cylinder
  • Drag reduction
  • Slip boundary

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