R
RobertMacy
Guest
On Sun, 28 Sep 2014 10:29:14 -0700, <meow2222@care2.com> wrote:
Bad example, ice is 'transparent to uWave. of course the energy will go in
a long way.
Again, was showing how the outside 'shields' the inside, [cooking first]
that is like skin effect.
Like a visual allegory of what is happening.
On Sunday, September 28, 2014 3:46:22 PM UTC+1, Robert Macy wrote:
...snip....
HOWEVER, there is still a decided skin effect in a water soaked
something
being heated in a microwave. The outside edges get most of the heat
energy, but the 'captured' interior appears to heat more.
It does heat more. Not the centre, but an inch or so inside the surface.
Lets take the example of defrosting a slice of frozen desert. The outer
edges are surrounded by warm air, the interior is surrounded by cold
ice. Yet an inch in it heats as much as the surface. 2" in, less so.
Bad example, ice is 'transparent to uWave. of course the energy will go in
a long way.
to 'see' skin
depth in a microwave, scramble an egg, place in a shallow dish, and
watch
as the ring of cooked egg progresses from the outside to the inside.
That simply does not demonstrate skin depth. The rf in a nuke oven is
deliberately bounced all round the place to get more even cooking, so
your egg is getting hit from every which way. If you put a light bulb in
a nuke and power it up, you'll see how the rf energy distribution has
not a whole lot to do with the kind of side firing single source you'd
need for your skin depth demo.
NT
Again, was showing how the outside 'shields' the inside, [cooking first]
that is like skin effect.
Like a visual allegory of what is happening.