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I was wondering if you need a minimal length/height for a good effect in a wave tank?
Do you use water? Or another liquid to avoid bacterial growth?
Patricia Verheyden
Technopolis
-----Oorspronkelijk bericht-----
Van: Informal Science Education Network
[mailto:[log in to unmask]]Namens Clifford Wagner
Verzonden: woensdag 2 november 2005 16:29
Aan: [log in to unmask]
Onderwerp: Re: Ways to Power a Wave Tank
ISEN-ASTC-L is a service of the Association of Science-Technology Centers
Incorporated, a worldwide network of science museums and related institutions.
*****************************************************************************
The Franklin Institute had a large boat model testing wave tank for a
long time but have since removed it. I believe the waves were created
by a wedge shaped pivoting plunger that was the length of the width of
the tank. The plunger was motorized- probably an important feature,
since watching how the boat models performed being towed through
regularly spaced waves was the main experiment. There are two
desirable variables- the size and the frequency of the waves. If you
make variable how far into the water the plunger goes into the water
you can control the size of the wave. A variable speed motor
controls the frequency. The evenly sized and spaced waves marching
down the tank were very beautiful. I can't remember what was at the
far end to absorb the waves- there was something, screens or the like,
so you didn't get much reflection waves coming back.
Probably the person to talk to is J. Newlin at Minnesota. They have a
nice wave tank in their experiment gallery and J. was the project
leader when the Franklin installed the towing tank in 1983.
Minnesota's wave tank is not a boat tester. It has a variable
"beach"- the bottom of the tank can change shape and therefore visitors
control how the waves break.
Clifford Wagner
On Nov 1, 2005, at 10:44 PM, George Wurtak wrote:
> ISEN-ASTC-L is a service of the Association of Science-Technology
> Centers
> Incorporated, a worldwide network of science museums and related
> institutions.
> ***********************************************************************
> ******
>
> At the Manitoba Science Centre we built a wave tank with pneumatic
> (hollow
> rubber) bladders, used on semi-trailer truck suspension, on either
> side of
> the fulcrum. They inflate in alternate periods (using a clock cam)
> when
> visitors push a button. While it was very reliable it was not terribly
> interactive, and certainly not what I think you are thinking of via
> visitors
> pushing on large rubber bladders. I have seen other tanks where
> visitors
> move a plate, horizontally, to create a beautiful wave (possibly at
> ScienceWorld B.C.), but I think this was also electrically controlled.
> -George Wurtak
> Winnipeg, Canada
> [log in to unmask]
>
> -----Original Message-----
> Date: Mon, 31 Oct 2005 10:52:05 -0600
> From: Eric Yuan <[log in to unmask]>
> Subject: Ways to Power a Wave Tank
>
> Hello,
>
> We are developing a wave tank as part of an alternative energy exhibit
> and
> are looking for a fun way for visitors to create waves. I've heard
> there's a
> wave tank where visitors push against a rubber bladder. Has anyone
> seen
> such a device, or know about its reliability?
>
> Thank you in advance for your help!
> -Eric
>
> ***************************
> Eric Yuan
> Exhibit Developer
> The Tech Museum of Innovation
> ******************************************************************
>
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