Numerical investigation of a water flow in a rib-roughened channel by using Reynolds stress model

Bayraktar S., Bayraktar M., Vardar N.

INTERNATIONAL JOURNAL OF COMPUTATIONAL FLUID DYNAMICS, cilt.22, sa.5, ss.331-339, 2008 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 22 Sayı: 5
  • Basım Tarihi: 2008
  • Doi Numarası: 10.1080/10618560801964905
  • Dergi Adı: INTERNATIONAL JOURNAL OF COMPUTATIONAL FLUID DYNAMICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.331-339
  • Anahtar Kelimeler: rib-roughened channel, Reynolds stress turbulence model, skin friction, computational fluid dynamics (CFD), water flow, TURBULENT HEAT-TRANSFER, EDDY SIMULATION, OPTIMIZATION, ROUGHNESS, SURFACE, RANS
  • Yıldız Teknik Üniversitesi Adresli: Evet

Özet

In this paper, water flow in a rib-roughened channel is investigated numerically by using Reynolds stress turbulence models (RSM) on a three-dimensional (3-D) domain. Computational results for mean streamwise velocity component and turbulent kinetic energy show good agreements with available experimental data. Five rib pitch-to-height ratios (p/h) of 1, 5, 10, 15 and 20 are analysed for six different Reynolds numbers (Re) of 3000, 7000, 12,000, 20,000, 40,000 and 65,000. Velocity vectors, streamlines and Reynolds stresses are showed for these ratios and Re numbers. Streamlines revealed that Reynolds numbers do not affect flowfield but play an important role in the Reynolds stresses.