Well when this all started it was a full convection vape. Then after a bunch of back and forth it was considered a hybrid vape that was mainly convection but due to the proximity of the heater and the medical grade stainless steel bowl retaining heat it also had some conduction going on. Now your telling me it's 100% conduction? Not arguing with you either, it's just interesting. But either way it's a nice vape especially the size!
Not sure what to say about what others might have said/believed, but I've never held it, or similar vapes, to be anything but conduction. Since before I knew about vapes. Since school and all that Thermodynamics stuff. Made a living following those rules, I believe in them.
I don't doubt a bit some made other claims, just not me.
IMO there is no such thing as a hybrid in these cases although it could be the case that heat 'leaks into the load' from poorly done convection systems I guess?. But again, in that case, there has to be a source of heat much hotter than the load......which is not the case here. The hottest temperature anywhere is 400F or so, same as the load. Heat can only flow from a hotter place to a cooler one. There's the issue of 'specific heat' in convection. The 'working fluid' (air in our case) can only carry a specific amount of heat (in calories, not degrees) and gives that up in 'calories per degrees C' of temperature drop. Air has very little such heat, which is why you can easily run your hand through a hot flame but get scalded badly by water much cooler (in degrees). You need a lot of quite hot air to supply the heat to the load needed to make vapor (remember, making vapor takes calories even if the degrees of the load never changes. Called 'latent heat of vaporization' this is what causes steam burns to be so severe. The 'extra heat' it took to boil the water 'comes back' as it condenses. It takes one calorie of heat to raise one gram of water one degree C (the definition of calorie, in fact). Going from 30C to 31C takes one calorie, as does going from 91 to 92. Few other fluids are this high. In fact Ice and steam (solid and gas phase of the same water) are about half a calorie per degree.
'Real convection vapes' (like say VG with a 1300C torch feeding it or TVs with 1300C (give or take) 'thermal cores') are much higher than 400F. Likewise, ESV (when it's heating air) is 'glowing hot'. Not a very efficient way to make vapor compared to conduction (which is why convection vapes are power hogs).
But changing a gram of water from liquid to gas (no temperature change, still 100C) takes about 540 calories.
Five hundred times more energy with no change in temperature. Likewise we need to supply a LOT of heat to make vapor happen, a constant flow. That flow can only be done one of 3 ways, conduction, convection, or radiation. Convection and radiation are out due to the 'delta' (difference) in temperatures between source and load. The source has to be much hotter, and heat the air way past 400F, in order for the hot air to 'give up' enough heat to do the job and still be hotter than 400F (so it doesn't become convection COOLING).
To keep a pan of water boiling you need to keep adding heat on the stove, a lot of heat. Even though the temperature of the water and stem never change from 212F. Only change over time is there's less water liquid and more water vapor. Once the water (liquid) is gone the pan can finally get hotter, hot enough to fire off the smoke alarm and get you to say naughty words. The pan (and your dinner) can 'finally' get past 212F.
FWIW, radiation needs HUGE deltas to work reasonably. A campfire warms you because it's very hot in there and you're standing very close. Radiation based vapes like Bender have incandescent ('glowing hot') sources very close just to transfer enough to give a solid hit. No 'easy trick'.
Those are the rules of Physics, established long ago and still valid. IMO using those technical terms should be done correctly. You can't call it convection unless it follows those rules......at least you should not. If we're really going to embrace 'STEM' (Science, Technology, Engineering and Math) we owe it to each other not to 'spread false Gospel' as it were? Although for many reasons (like ignorance or desire for sales for instance) it happens. Or just the sincere belief that convection is superior and we all want superior? It's not, of course, a calorie is a calorie no matter if it got there by conduction, convection or radiation.
You're welcome to believe what you want, of course, we all are. But that's what I believe and why. Why is important IMO. We should not 'abuse' technical terms if we wish our young in school to use them correctly and get on the STEM train. Just it's love of 'heat soaks' proves F2 can't be convection to me. You can't 'overrun' a convection vape with a big hit, unlike what we see here. That's a 'conduction thing'.
What, in the end, is in a name? Shakespeare asked "would a rose by any other name smell as sweet?". But he's dead now.
Regards to all and my thanks to those curious enough to wade through all the above. Fun stuff, like I said I used to make money teaching such things, and using them 'on the job'. So they are more important to me than most?
OF
. 
