# Free Vortex Flow: Vorticity & Streamlines at Eye of Vortex

• Death eater
In summary, a free vortex flow is a type of fluid flow where fluid particles rotate around a central axis without any external forces. Vorticity is a measure of the local rotation in a flow, formed by the conservation of angular momentum. Streamlines are imaginary lines representing the path of fluid particles, which in a free vortex flow are concentric circles. The eye of the vortex is the central point where the velocity is zero, and is significant because it has the lowest pressure and strongest rotational motion.
Death eater
TL;DR Summary
Non-trivial component of velocity vector is tangential?
In free vortex what does it mean " non-trivial component of velocity vector is tangential"? I know only the tangential component of velocity exists in free vortex flow, so what happens at the eye of the vortex ( what happens to vorticity and streamlines to be specific)?

The eye of a vortex is a singularity, so the concept of tangential velocity breaks down entirely.

JBA

## 1. What is a free vortex flow?

A free vortex flow is a type of fluid flow in which the velocity of the fluid particles at any point is dependent only on the distance from the center of the vortex. This type of flow is characterized by a swirling motion and is commonly seen in natural phenomena such as tornadoes and hurricanes.

## 2. What is vorticity in free vortex flow?

Vorticity is a measure of the local rotation of a fluid element in a flow. In a free vortex flow, vorticity is constant and has a magnitude proportional to the angular velocity of the fluid particles. This means that the vorticity is highest at the center of the vortex and decreases as you move away from the center.

## 3. How are streamlines related to free vortex flow?

Streamlines are imaginary lines that represent the direction of fluid flow at a given point. In a free vortex flow, the streamlines are circular and centered around the vortex. This means that the fluid particles move along these circular paths as they swirl around the center of the vortex.

## 4. What is the significance of the eye of the vortex in free vortex flow?

The eye of the vortex is the center of the swirling motion in a free vortex flow. It is a region of low pressure and low vorticity, where the fluid particles have the highest velocity. This is why the eye of a tornado or hurricane is often calm and clear, as the air is rising and moving away from this central point.

## 5. How is free vortex flow different from other types of fluid flow?

Free vortex flow is unique in that it is an idealized flow where there is no external force or pressure acting on the fluid particles. This means that the flow is purely rotational and there is no change in the velocity or shape of the vortex over time. In contrast, other types of fluid flow, such as laminar or turbulent flow, are affected by external forces and can change in velocity and direction over time.

• Aerospace Engineering
Replies
3
Views
735
• Mechanical Engineering
Replies
11
Views
3K
• Mechanical Engineering
Replies
18
Views
3K
• Mechanical Engineering
Replies
2
Views
923
• Mechanical Engineering
Replies
1
Views
3K
• Mechanical Engineering
Replies
9
Views
2K
• Mechanics
Replies
3
Views
2K
• Mechanical Engineering
Replies
10
Views
4K
• Mechanical Engineering
Replies
4
Views
2K
• Differential Equations
Replies
3
Views
504