It is a cool little experiment and it sounds like he spent some quality time with his little girl teaching her about science, so my hats off to him. What a cool dad. A lot of that information is on the internet already though with computer generated models.
However I didn't see the point behind the video and how it applied to vaping. I was expecting to see some air flow tests with actual atomizers while under power. Maybe some CFM and heat numbers as well. The test didn't account for real life air flow in a particular atomizer, or take into account the heat generated by it or the fact that it is boiling off liquid while the air is flowing around it. All of these would effect the dynamics of the air flow.
And again, I never saw where the point to all of that was. Maybe he said and I missed it? Was he trying to say one type of coil has better flavor, or produces more vapor or what?
I have tested various different coil designs by actually putting them in an atomizer and vaping them. My findings were it really didn't make much difference, if any at all. All I found was the fancy coils used more wire, took more time and effort to make, used more battery and juice. Some do produce more vapor to my eye, but I have no way to actually measure vapor volume. And I can't say for sure if it was due to the coil design or just the fact that those kind of coils tend to have a lower resistance and you end up running more power through them.
I have found that the design of the atomizer has way more to do with flavor than the coil you use. With the kayfun designs being very hard to beat. And good luck getting one of those fancy coils in the deck of one of those tank designs lol.
Now if you are cloud chasing and using an RTA with a big open deck and vaping at 40 watts or more then ya, go for it. I don't know that they really work any better than a larger diameter round wire that would have equal resistance, but they sure do look pretty.
Hi Paul, and thanks for calling me a cool dad
This is an ongoing series. I can't repeat everything I have said in all of my videos every time I make a new one. This is a "part 2" on flat wire coils vs clapton coils. My expressed goal in all my videos is better flavor, starting with the first video "flat wire coil tutorial". I touch on every aspect of vaping, I have simulated flows in RDAs with multiple flows and coils, but this time I wanted to look at flow, drag, heat exchange at the slow speeds over different coils.
I agree that the RDA itself is most important regarding flavor, that's why most of my videos are on that subject. This last one was on the properties of the coils itself, to see how well air flow passed around the different designs. Because, the more eficient the cooling is, the hotter you can run the coil, and the more vapor and flavor you can get out of it.
All the flaws you have pointed out are commented in the video. This is purely anecdotal "evidence", indicating that clapton coils have separation points in very slow air flows (less than 20mph), but that smooth surface coils benefits from the Coanda effect.
If you have links to computer simulation that shows flow over cylinders with different surfaces or trip wires at air speeds in the 5-20 mph range, I will be extremely happy if you could post a link. I have not found such simulations myself.
Cheers!
