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, ss.331-339, 2008 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 22 Konu: 5
  • Basım Tarihi: 2008
  • Doi Numarası: 10.1080/10618560801964905
  • Dergi Adı: INTERNATIONAL JOURNAL OF COMPUTATIONAL FLUID DYNAMICS
  • Sayfa Sayıları: ss.331-339

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.