Large eddy simulation of flow around two side-by-side spheres

Küçük Resim Yok

Tarih

2013

Dergi Başlığı

Dergi ISSN

Cilt Başlığı

Yayıncı

KOREAN SOC MECHANICAL ENGINEERS

Erişim Hakkı

info:eu-repo/semantics/closedAccess

Özet

Large eddy simulation, using a dynamic Smagorinsky sub-grid scale, is used for the prediction of flow structures around two identical spheres fixed side-by-side at a subcritical flow regime with the Reynolds number equal to 5,000. The QUICK discretization method is applied to discretize the convection terms of the Navier-Stokes equation by means of the finite volume approach. This work focuses mainly on the wake structures downstream of the two interactive spheres located at three various dimensionless separation distances between spheres such as G/D = 1.50, 2.00, and 3.00. The obtained results revealed that the interaction between wakes affects the flow structures downstream of spheres. The rate of this interaction is strongly altered as a function of separation distance. On the other hand, some flow data such as mean drag and mean lift coefficients are affected due to the wake interactions. Finally, examination of the Reynolds stress variation along the different lateral axis, L/D, revealed that the nozzle effect does not play a significant role on the turbulence characteristics beyond the G/D = 3.00.

Açıklama

Anahtar Kelimeler

Computational fluid dynamics, Large eddy simulation, Side-by-side spheres, Turbulence, Wake flow

Kaynak

JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY

WoS Q Değeri

Q3

Scopus Q Değeri

Q2

Cilt

27

Sayı

7

Künye