## Reynolds number |

Item | Data |
---|---|

Formula |
For circular pipes only |

Nomenclature |
Re=Reynolds number for circular pipe (adimensional) D=diameter of pipe (m) <u>=mean velocity (straight section) (m/s) ρ=Volumic mass of the liquid (kg/m ^{3})μ=Dynamic viscosity (Pa.s) |

Usual values |
Re<2100 : laminar regime 2100<Re<4000 : intermediary regime Re>4000 : turbulent regime |

Related |
Reynolds number for stirred reactor Re<10 : laminar regime 10<Re<10000 : intermediary regime Re>10000 : turbulent regime D=diameter of agitator (m) N=agitator speed (rps) |

Source |
Mecanique et Rheologie des fluides en genie chimique, Noel Midoux, Lavoisier Tec et Doc, page 139, page 246 |