[ATM] Re: synthetic jets

[fabio@voreas.com]

I didn't find any indication of cost, but looking at other piezoelectric 
technologies it is bound to be expensive--at least until demand causes a 
price reduction. 

One can also by piezo fans used to cool off hot CPUs. Last time I checked 
those went for over $100--significantly higher than your run of the mill 
mini fan. 

What advantages would one get with piezo technology? Lack of EMI is the only 
one I can think of. 

Fabio
Don Clement writes: 

> Georgia Tech has come up with a method of breaking up thermal boundary
> layers by creating an airflow with tiny vortices. Synthetic jets arrays are
> created using electromagnetic or piezoelectric drivers vibrating a diaphragm
> at 100 to 200 Hz. The drivers look like small loud speakers. There are no
> friction parts to the drivers. I was thinking that this technology could
> replace fans blowing across the face of mirrors to break up the thermal
> boundary layer. see:
>  http://www.edtv.gatech.edu/articles/articlesans.cfm?ID=156 
> 
> Don Clement
> Running Springs, California
> http://www.ClementFocuser.com 
> 
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