Numerical investigation of flow structures around a sphere

Hassanzadeh R., ŞAHİN B., Ozgoren M.

INTERNATIONAL JOURNAL OF COMPUTATIONAL FLUID DYNAMICS, cilt.25, sa.10, ss.535-545, 2011 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 25 Sayı: 10
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1080/10618562.2011.633489
  • Dergi Adı: INTERNATIONAL JOURNAL OF COMPUTATIONAL FLUID DYNAMICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.535-545
  • Anahtar Kelimeler: finite volume method, large eddy simulation, sphere, turbulence, vortical flow, wake flow, NEAR-WAKE
  • Çukurova Üniversitesi Adresli: Evet

Özet

A numerical investigation of flow around a sphere is performed and compared with previous studies. Here, a second-order accurate, finite volume method is used in order to predict the instantaneous and time-averaged flow characteristics using large eddy simulation (LES) on the multi-block grid system. Namely, the objectives of this article are: (i) the presentation of flow structures in the wake region downstream of the sphere with a wide variety of flow properties such as the distribution of velocity vectors, patterns of streamlines, Reynolds stress correlations, root mean square of velocity components and other time-averaged flow data in order to reveal the vortical flow structures in detail and (ii) to demonstrate the abilities of computational methods in simulation of vortical flow data. Finally, it has been concluded that there are good agreements between the experimental results and numerical predictions.