Re: water pressure

Adnan wrote:

> i'm sorry if this post made pissed you off but i just want to do
> project for school..
> ok so i wanted to do is this..
>
> make the water so move fast (like the water coming out of fire hydrant)
> so i can simulate a tsunami...and i thought i could do this with blower
> or wanted to know even if this is even possible..

A tsunami is a wave-phemomenon - so there it no use simulating this with a
blower, which will mainly generate currents and wind waves (with short
wavelengths). A tsunami is a so-called shallow-water wave i.e. where the
wave's length is long compared to the waterdepth. Therefore it travels with
a speed c=sqrt(g*d) with g the gravity and d the depth. Plugging in a
typical depth of 1km, gives that the wave travels with about 100 m/s, or
360 km / h. To simulate a tsunami I would recommend having a thin layer of
fluid which you bring into motion by moving a board back and forth in the
water at one end. The fun would be putting a beach on the other side, and
seeing how far the water comes in.

If you want to set up an experiment it is never a bad idea to search the
internet for the underlying physical mechanisms. Using "tsunami wave
physics" gives several useful sites.

HTH, Maarten
--
===================================================================
Maarten van Reeuwijk dept. of Multiscale Physics
Phd student Faculty of Applied Sciences
maarten.ws.tn.tudelft.nl Delft University of Technology
.

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