Kinderlehrer's wrote:
>
> Dan, just 1 question on your point #4- for flow separation to ocurr,
> wouldn't there have to be air trapped in the water jacket? How would that
> happen? Sorry, that's 2 questions :-)
>
> Bob K
> Bob,
No there doesn't have to be air in the water jacket. Flow separation can
occur when any fluid flows around a surface. Just as you can have flow
separation on a car or airplane you can get separation around a submerged
submarine. When I said that separated flow inhibits the heat transfer
process it isn't because there are air bubbles mixed in with the water
(as you might see behind a rock in a stream), it is because the swirling
eddies form a region of relatively isolated flow and don't transfer heat
well to the primary stream of water going through the cooling jackets. I
hope this helps, but if it didn't feel free to follow up.
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