CFD simulation of flow over the dimpled sphere

Author

Spalensky, Vojtech ; Horak, Vladimir ; Rozehnal, Dalibor

Author_Institution

Dept. of Air Force & Aircraft Technol., Univ. of Defence, Brno, Czech Republic

fYear

2015

fDate

19-21 May 2015

Firstpage

1

Lastpage

4

Abstract

The paper deals with problems of CFD simulating airflow over a dimpled spherical surface and its validation by the wind tunnel testing. The low-cost simulation approach was applied to be run on a common PC using the commercial software ANSYS CFX. The wind tunnel testing has been performed in the laboratory of aerodynamics at the Department of Air Force and Aircraft Technology of the University of Defence. Measured results of the drag coefficient versus the Reynolds number for smooth and dimpled spheres were compared and discussed. Presented simulation corresponds adequately to the experimental results. It can be stated that the CFD simulation is suitable for simulating the flow over the dimpled surface and for the evaluation of the drag coefficient for smooth and dimpled spheres.

Keywords

aerodynamics; computational fluid dynamics; drag; finite element analysis; flow simulation; mechanical testing; shapes (structures); wind tunnels; ANSYS CFX software; CFD simulation; Department of Air Force and Aircraft Technology; Reynolds number; University of Defence; airflow simulation; dimpled spheres; dimpled spherical surface; drag coefficient; laboratory of aerodynamics; low-cost simulation approach; smooth spheres; wind tunnel testing; Aerodynamics; Atmospheric modeling; Computational fluid dynamics; Computational modeling; Drag; Numerical models; Sports equipment; CFD simulation; aerodynamics; dimpled surface; drag; flow separation; golf ball;

fLanguage

English

Publisher

ieee

Conference_Titel

Military Technologies (ICMT), 2015 International Conference on

Conference_Location

Brno

Print_ISBN

978-8-0723-1976-3

Type

conf

DOI

10.1109/MILTECHS.2015.7153662

Filename

7153662