# Difference Between Kinematic And Dynamic Viscosity

The resistance of a fluid to flow under force is called viscosity. Dynamic viscosity is the resistance to the movement of one liquid layer over another.

The unit of dynamic viscosity is Pa s. Usually, it is measured in centipoise (cP). Kinetic viscosity is expressed as the ratio of a fluid’s dynamic viscosity to its density. Unit of measurement for kinematic viscosity

Viscosity is defined as an elementary property when studying the movement of a fluid over the entire system. The two main types of viscosity are kinetic and dynamic.

The relationship between these two qualities is quite simple. At first glance it seems like a simple matter. In reality, however, there are many terms that fall under that definition. These levels determine its size.

Dynamic viscosity, also known as absolute viscosity, evaluates the internal resistance of a fluid to flow resistance; In contrast, kinetics describes the ratio of dynamic viscosity to density.

Depending on the density of two liquids with the same high viscosity value, the kinetic density can have a different value and vice versa.

### Difference Between Kinematic And Dynamic Viscosity

Properties | Kinematic Viscosity | Dynamic Viscosity |

Also known as | Diffusivity of momentum | Absolute Viscosity |

Represents | Inertia as well as viscous force | The viscous force of the fluid |

Symbol | ν | μ |

Ratio | The ratio of dynamic viscosity to density | The ratio of shear stress to shear strain |

Used | When inertia, as well as viscous force, is dominant | When viscous force is dominant |

Density | Dependent | Independent |

Unit | m2/s | Ns/m^{2} |