# Poiseuille law for resistance

## Description

As fluid flows through tubes there is resistance, between the fluid and the wall that opposes the flow. The resistance to laminar flow of an incompressible fluid, through a horizontal tube of uniform radius and length is related to the viscosity of the fluid the length and the radius of the tube

Related formulas## Variables

R | Resistance to laminar flow (N*s/m^{5}) |

n | Viscosity of the fluid (N*s/m^{2}) |

l | Length of the tube (m) |

π | pi |

r | Tube radius (m) |

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