a | [m] | cyclone inlet height |

A | [m | area of the cyclone inlet surface |

A | [m | area of the cyclone outlet surface |

b | [m] | cyclone inlet width |

C | [-] | pressure loss coefficient |

C | [-] | k-ε based model constant |

D | [m] | cyclone body diameter |

D | [m] | cyclone dust bin diameter |

D | [m] | cyclone drop tube diameter |

D | [m] | cyclone vortex finder diameter |

f | [-] | rotation function as a multiplier of eddy viscosity turbulent production term |

H | [m] | total cyclone height |

H | [m] | cyclone dust bin height |

H | [m] | cyclone cone height |

H | [m] | cyclone drop tube height |

k | [m | turbulent kinetic energy |

L | [m] | cyclone vortex finder length |

$\overline{p}$ | [Pa] | time-averaged static pressure |

$\overline{\overline{p}}$ | [Pa] | filtered static pressure |

$\Delta p$ | [Pa] | pressure drop |

P | [Pa] | cyclone inlet pressure |

${p}_{k}$ | [Pa∙s | turbulent production term in eddy viscosity models |

P | [Pa] | cyclone outlet pressure |

${\overline{\overline{s}}}_{ij}^{sgs}$ | [s | large-scale strain rate tensor |

t | [s] | time |

u | [m∙s | fluid velocity |

u′ | [m∙s | fluctuating fluid velocity |

$\overline{u}$ | [m∙s | mean (time-averaged) fluid velocity |

$\overline{\overline{u}}$ | [m∙s | filtered fluid velocity |

U | [m∙s | cyclone inlet normal speed |