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Hydrodynamic Levitation!

screenshot of the scene

Author: Kilinich

Group: Default

Filesize: 45.72 kB

Date added: 2017-06-27

Rating: 6.1

Downloads: 5940

Views: 896

Comments: 12

Ratings: 3

Times favored: 0

Made with: Algodoo v2.1.0


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Hydrodynamic Levitation Demo in Algodoo.
It works! 8|

Last edited at 2017/06/27 22:16:28 by Kilinich
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adhesion = 1000 :o
Last edited at 2017/06/28 00:09:46 by Xray
Where's the water come from?
Oh wait. I got it
Since the water in the Algodoo scene does not wrap enough for the water to exit with a downward velocity component, then either Algodoo or the explanation of how this works in the video is wrong. For now I will believe Algodoo and assume that it is the impact of the water that keeps the ball up.
Overhead sprinklers too balloons
s_noonan - If it is the impact of the water that keeps the ball up, then the ball should not need a large adhesion value which is what it has. When I set adhesion to zero, the ball no longer stays levitated.
I think that the adhesion is required in order to move the ball towards the stream, but I'm not sure if there is enough adhesion to lift the ball. Here's a few theories:

1. The water ejected from the ball creates a force on the ball to move it towards the stream, which impacts it.

2. The water sticks to the ball and the energy of the water slowing down and changing direction levitates the ball and moves it towards the stream.

3. The water wraps around the ball and the reaction to the water leaving the ball levitates the ball and moves it towards the stream.

P.S. After watching the video a second time, I see that the explanation is a combination of theory #1 and #2. So now I think that the video explanation and Algodoo are correct and that my original interpretation of the video was wrong.
Last edited at 2017/06/28 23:39:19 by s_noonan
In the video, I believe that the ball holds fast to the water jet because of Bernoulli's principle

Basically, it states, as the velocity of a fluid increases over a surface, the atmospheric pressure on that surface decreases. It's what allows an airplane wing to produce lift. I'm not so sure that the same effect can occur in Algodoo without increasing adhesion or attraction properties as kilinich did.
Last edited at 2017/06/29 01:55:13 by Xray
The video explicitly states that it's not the Bernoulli effect that keeps the ball up and gives arguments to support the claim. In short, they say that the impact, adhesion, and change in direction of the water lift the ball and force it towards the stream.
2 Xray: Adhesion 1000 is not necessary, 10 is enough. Just forget to change back from test.
:o All i know is, its cool