**Difference between Lagrangian and Eulerian Approach**

Contents

**Comparison between Lagrangian and Eulerian Method**

**Summary:**

- In a fluid motion, each fluid particle has its velocity and acceleration at any point in time.
**Velocity**and**acceleration**of a particle may change with.*time or position*- Two methods are used in the fluid motion
**Langrangian Method****Eulerian Method**

**Comparison Chart**

Langrangian Method |
Eulerian Method |
---|---|

An observer concentrates on the movement of a single fluid particle. | An observer concentrates on the fixed point particles. |

An observer has to move with the fluid particle to observe its movement. | An observer remains stationary and observes changes in the fluid parameters at the fixed point only. |

An observer remains stationary and observes changes in the fluid parameters at the fixed point only. | The method describes the overall flow characteristics at various points as fluid particles pass. |

Not commonly used. | Commonly used. |

### What is the Lagrangian approach?

**Langrangian method**, the observer follows a single fluid particle during its motion and will observe the change in its properties like velocity, acceleration, density, etc

**What is the Eulerian approach?**

**Eulerian method**, the observer concentrates on a fixed point or a region and will observe the change in velocity, acceleration, density, etc. at that point only.