Angular Velocity Formula for Turbulent Vortex Chamber Flows

Yunjie Li, Qizhong Guo

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


Vortex separators are increasingly utilized to remove suspended solids from stormwater runoff. Understanding flow patterns in a confined vortex chamber is crucial when investigating the mechanisms of liquid-solid separation. The angular velocity of fluid motion around the vertical axis is a dominant parameter for determining fluid flow patterns and particle trajectories in a rotational flow field. In this paper, an angular velocity formula, based on the angular-impulse momentum principle coupled with the Rankine vortex model, is derived under steady flow conditions. Comparison of predicted results using this formula to experimental data from a previous study indicates a general agreement. The derived formula can be used to estimate the angular velocity of the rotational flow field in vortex separators with tangential inlet and without internal components.

Original languageEnglish (US)
Pages (from-to)467-470
Number of pages4
JournalJournal of Hydraulic Engineering
Issue number5
StatePublished - May 10 2012

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Water Science and Technology
  • Mechanical Engineering


  • Angular momentum
  • Angular velocity
  • Average shear stress
  • Hydrodynamic separator
  • Rotational flow
  • Torque
  • Vortex chamber flow


Dive into the research topics of 'Angular Velocity Formula for Turbulent Vortex Chamber Flows'. Together they form a unique fingerprint.

Cite this