Vortex rings through ground?

[Mad_Furby]

I’ve seen people blowing smoke rings and dolphinsblowing bubble rings I was wondering if it was a physical possibility to do thesame thing but through soil or sand or whether its too dense.

 

What exactly is a vortex ring? Is it ashock wave of force carrying another substance or is it an actual particle flow

 

 

 

Furbs

 

 

[swansont]

Air bubbles and smoke rings are different substances than the medium, so I think it's clear that it's actual flow rather than a density fluctuation.

[imatfaal]

You can get fairly coherent ring vortices with a single substance though.

 

http://en.wikipedia.org/wiki/Air_bazooka

 

We had one similar to these one Christmas - and you could knock down Greetings cards from at least 20 feet

[ewmon]

I’ve seen people blowing smoke rings and dolphinsblowing bubble rings I was wondering if it was a physical possibility to do thesame thing but through soil or sand or whether its too dense.

You can get fairly coherent ring vortices with a single substance though.

 

Fairy coherent rings propagate through the soil.

[imatfaal]

Fairy coherent rings propagate through the soil.

 

groan