Numerical investigation of Magnus effect on dimpled spheres

Nikolaos Beratlis, Kyle Squires, Elias Balaras

Research output: Contribution to journalArticle

10 Citations (Scopus)

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
StatePublished - 2012

Fingerprint

Magnus effect
aerodynamic forces
cylindrical coordinates
Direct numerical simulation
alternations
direct numerical simulation
solid surfaces
metal spinning
drag
Drag
Reynolds number
Aerodynamics
Mechanics
Boundary conditions
boundary conditions
formulations

Keywords

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

ASJC Scopus subject areas

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

Cite this

Numerical investigation of Magnus effect on dimpled spheres. / Beratlis, Nikolaos; Squires, Kyle; Balaras, Elias.

In: Journal of Turbulence, Vol. 13, 2012, p. 1-15.

Research output: Contribution to journalArticle

Beratlis, Nikolaos ; Squires, Kyle ; Balaras, Elias. / Numerical investigation of Magnus effect on dimpled spheres. In: Journal of Turbulence. 2012 ; Vol. 13. pp. 1-15.
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