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, vol.22, no.5, pp.331-339, 2008 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 22 Issue: 5
  • Publication Date: 2008
  • Doi Number: 10.1080/10618560801964905
  • Journal Name: INTERNATIONAL JOURNAL OF COMPUTATIONAL FLUID DYNAMICS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.331-339
  • Keywords: 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 Technical University Affiliated: Yes

Abstract

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.