On 1/27/2010 4:07 PM, Randall wrote:
>> Wonder if that's purposely
>> designed in ? Might be to direct a potential explosion,
>>
> Makes sense to me. And why else would the bottom be concave on an electric
> heater? Normally pressure vessels are convex, to distribute the forces
> better.
>
> -- Randall
>
Concaved also distributes forces, outward toward the rim. If the bottom
were flat, pressures would deform it to convexed and the bottom would
pull away from the rim. With a concaved bottom, pressures would deform
it towards flat and push the rim outwards into the side walls. And it
will stand.
Peter T.
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