## Abstract

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 language | English (US) |
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Pages (from-to) | 467-470 |

Number of pages | 4 |

Journal | Journal of Hydraulic Engineering |

Volume | 138 |

Issue number | 5 |

DOIs | |

State | Published - May 10 2012 |

## All Science Journal Classification (ASJC) codes

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

## Keywords

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