|
|
re: how many watts in the flame of a candle?
5 dec 2001
bill "wrong again" roosa wrote:
>...i upgraded to si in college and haven't got a reason to stop
>using it.
does your home depot sell 15 kw furnaces or metric r3 insulation? :-)
>if you check you memory this ng is an international one and the
>international units are the ones i posted for.
my memory is fine, thanks, and people can use any units (or languages)
they want to use here. you didn't mention any units. you wrote:
>for a vertical cylinder in air the simplified formula for h is
>h = 1.42 * (delta t/l)^0.25 if convection flow is laminar and l is the
>vertical dimension
correct, in w/m^2-k, with l^3dt < 1, in si units, ignoring conduction.
>or h = 0.95(delta t)^0.3333 if flow is turbulent
wrong. that's 1.31dt^0.3333, ignoring conduction.
nick
|
|
