Yes, sorry -- I was referring back to the 2013 test. For that we had a picture of the ceramic frame holding the resistor wires, which was cast in two (I recall, without looking it up) sections.
For a small area, we have a solid plate (complicated by fins), and then a cog-like structure with the gap towards the outside. Presuming that this makes good thermal contact to the outer cylinder we can approximate it as a rectangular block with a rectangular hole, with the wire in the center. The wire itself is mostly in poor contact with the holder, so it supplies heat by thermal radiation (or induction, though I think that's less likely). There are two pathways from the inner hot zone: by conduction through the solid part of the gear, and by radiation through the gap. ( It's probably close to thermal equilibrium.) Given that Alumina is an insulator, I don't know which wins, but there is definitely a possibility of a temperature difference, which may persist. I don't have the tools (comsol etc) to model the radiation in and across the gap. ----- Original Message ----- From: "H Veeder" <hveeder...@gmail.com> To: vortex-l@eskimo.com Sent: Monday, October 13, 2014 8:30:55 PM Subject: Re: [Vo]:An expert reviewed and approves of this configuration Maybe I misunderstood but when he said the march test, I thought he meant the march test of 2013. Harry On Mon, Oct 13, 2014 at 11:17 PM, ChemE Stewart < cheme...@gmail.com > wrote: Alumina is a top notch insulator and the coil is imbedded in it. More heat must be leaving other routes. Where r the fins? I have not studied the photos. On Monday, October 13, 2014, H Veeder < hveeder...@gmail.com > wrote: <blockquote> The banded regions should absorb heat and in the long run reach the same temperature as their surroundings. The fact that they persist is a sign of something significant...and I don't mean fraud or incompetence. <blockquote> <blockquote> <blockquote> AJF: Figure 6 : this is complicated by transmission, which may be happening in the visible range. (IF the helical shadows are indeed images or shadows of the coiuls. But I still think they represent different conduction zones of a ceramic holder, as in the March test). However, this has a broad peak near the center of the visible range, so the blue might be enhanced a little. I find it odd the dark bands (a.k.a the "shadows") persist. I can understand how differences in conduction play a role when the reactor first starts but in the long run shouldn't the dark bands disappear? Harry </blockquote> </blockquote> </blockquote> </blockquote>
