A comparative study of manhole hydraulics using stereoscopic PIV and different RANS models

Md Nazmul Azim Beg, Rita F. Carvalho, Simon Tait, Wernher Brevis, Matteo Rubinato, Alma Schellart, Jorge Leandro

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Flows in manholes are complex and may include swirling and recirculation flow with significant turbulence and vorticity. However, how these complex 3D flow patterns could generate different energy losses and so affect flow quantity in the wider sewer network is unknown. In this work, 2D3C stereo Particle Image Velocimetry measurements are made in a surcharged scaled circular manhole. A computational fluid dynamics (CFD) model in OpenFOAM® with four different Reynolds Averaged Navier Stokes (RANS) turbulence model is constructed using a volume of fluid model, to represent flows in this manhole. Velocity profiles and pressure distributions from the models are compared with the experimental data in view of finding the best modelling approach. It was found among four different RANS models that the re-normalisation group (RNG) k-ε and k-ω shear stress transport (SST) gave a better approximation for velocity and pressure.
Original languageEnglish
Pages (from-to)87-98
Number of pages12
JournalWater Science and Technology
Volume2017
Issue number1
Early online date28 Feb 2018
DOIs
Publication statusPublished - 26 Apr 2018
Externally publishedYes

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Keywords

  • Manhole
  • OpenFOAM(r)
  • RANS model
  • Stereoscopic Particle Image Velocimetry (PIV)
  • Volume Of Fluid (VOF)

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