Numerical investigation of Magnus effect on dimpled spheres

Nikolaos Beratlis, Kyle Squires, Elias Balaras

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Direct numerical simulations of spinning dimpled spheres at three distinct flow regimes, subcritical, critical, and supercritical, are reported. A highly efficient, structured, and finite-difference solver in cylindrical coordinates is utilized, together with an embedded boundary formulation to impose the proper boundary conditions on the solid surface. The results exhibit all the qualitative flowfeatures that are unique in each regime, namely the drag crisis and the alternation of the Magnus effect. In the critical regime, and for a certain range of rotation rates and Reynolds numbers, a negative lift force is produced. For all cases we provide quantitative evidence and analysis of the detailed mechanics of separation and its impact on the aerodynamic force generation.

Original languageEnglish (US)
Pages (from-to)1-15
Number of pages15
JournalJournal of Turbulence
Volume13
DOIs
StatePublished - 2012

Keywords

  • Drag reduction
  • Golf ball
  • Lift generation
  • Magnus effect
  • Separation control

ASJC Scopus subject areas

  • Computational Mechanics
  • Condensed Matter Physics
  • Mechanics of Materials
  • Physics and Astronomy(all)

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