[Beowulf] Re: Airflow

[Mark Hahn]

> http://krone.physik.unizh.ch/%7Estadel/zBox/
> The chimney design is interesting.

it's a very neat machine.  but it's not really that 
much different from a traditional hot/cold aisle design.
not to _ignore_ convection, but consider that the successor zbox2 uses 
a more traditional "wall of compute" with cold air delivered low-front, 
and the hot air return high-back.  a confined space like this 
is very attractive in managing airflow, since you don't need to
worry much about, for instance, counter-circulation over the tops 
of the racks.