Date: Tue, 05 Nov 2002 15:33:43 -0500

Author: Gerald Zani

Subject: Re: Flame tube

Post:

If my memory is correct I think the fluid used is Kerosene. I saw Wolf do
it at Harvard in 1994. Jerry

At 02:00 PM 11/5/2002 -0600, you wrote:
>Kent,
> There is a rather spectacular version of the standing waves in a
> tube is to fill the bottom with a fluid and the peaks of the anti-nodes
> break the surface tension and to form little spurts of fluid drops. If I
> remember correctly the fluid used is kerosine. Wolfgang can you help me here.
> There is a function version at the Boston Science Museum.
>Gary
>
> wrote:
>>I'm interested in building a flame tube -- basically a large "gas grill"
>>with a speaker in one end that shows standing waves by the corresponding
>>heights of the flames. I have a student who has the know-how to build
>>one, but we'd appreciate any information & advice -- or, best of all,
>>some plans! In particular, we're wondering whether anyone knows anything
>>about choosing the hole spacing and diameter.
>>
>>As a related demonstration, my student was suggesting that, instead of
>>putting gas in the tube and burning it, we might put two immisicble
>>liquids with different densities in a clear plastic tube and see whether
>>the periodic density gradient produced by standing waves would result in
>>a visible pattern. Does anyone know if this has been tried before?
>
>Gerald Zani e-mail: Gerald_Zani@brown.edu
>Manager of Demonstrations phone: (401) 863-3964
>Department of Physics FAX: (401) 863-2024
>Brown University Providence, RI 02912-1843 USA
>
>URL http://www.physics.brown.edu/users/staff/zani/index.html
>URL http://www.physics.brown.edu/Studies/Demo/
>
>Do a little more of that work which you have confessed to be good,
>Which you feel that society and your most Just Judge rightly demand of you.
>Cultivate the tree which you have found to bear fruit in your soil.
>If you have any experiments you would like to try, try them.
>Now's your chance.
>Henry David Thoreau, Journal entry, 1850.

Back