A unit of volume flow rate equal to 1 cubic meter per second. |

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A unit of volume flow rate equal to 1 cubic meter per second. |

## Related Terms |

## PHASE FLOW RATEThe amount of one phase of a multiphase flow flowing through the cross-section of a conduit in unit time. The phase flow rate may be specified as phase volume flow rate or as phase mass flow rate. |

## MULTIPHASE FLOW RATEThe total amount of the two or three phases of a multiphase flow flowing through the cross-section of a conduit in unit time. The multiphase flow rate should be specified as multiphase volume flow rate or multiphase mass flow rate. |

## PHASE VOLUME FRACTIONThe phase volume flow rate of one of the phases of a multiphase flow, relative to the multiphase volume flow rate. |

## WATER CUT (WC)The water volume flow rate, relative to the total liquid volume flow rate (oil and water), both converted to volumes at standard pressure and temperature. The WC is normally expressed as a percentage. |

## GAS-LIQUID-RATIO (GLR)The gas volume flow rate, relative to the total liquid volume flow rate (oil and water), all volumes converted to volumes at standard pressure and temperature. |

## WATER-IN-LIQUID RATIO (WLR)The water volume flow rate, relative to the total liquid volume flow rate (oil and water), at the pressure and temperature prevailing in that section. |

## SYSTEMS CURVEA graphic presentation of the pressure vs. volume flow rate characteristics of a particular system. |

## MULTIPHASE FLOW RATE METERA device for measuring the flow rate of a multiphase flow through a cross-section of a conduit. It is necessary to specify whether the multiphase flow rate meter measures the multiphase volume or mass flow rate. |

## MULTIPHASE FLOW VELOCITYThe flow velocity of a multiphase flow. It may also be defined by the relationship (Multiphase volume flow rate / Pipe cross-section). |

## SUPERFICIAL PHASE VELOCITYThe flow velocity of one phase of a multiphase flow, assuming that the phase occupies the whole conduit by itself. It may also be defined by the relationship (Phase volume flow rate / Pipe cross-section). |

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