How do tanks work?

[Aal_]

Hi guys,

I would like to understand the theory behind the tanks. I know this might be a highly technical question and I would like it to be. Mainly what i am after is the game of pressure, air and liquid inside the tank (Ody, Penny, Ithaka ...). First we are assuming the tank where the liquid resides is sealed and the only opening is the opening of the mouthpiece where a little bit is exposed. When you close air control, and take a drag, you would see bubbles. Does this mean that liquid is being replaced by some of the air dragged? is the empty space in the tank full of air? Then why sometimes you have vacuum? how is the vacuum created? is it because the liquid touches the wick and is brought up by capillarity without any air going in? Which is better to have vacuum or air in the empty space in the tank?

Every time i think i understand this, i get confused later on by some of the comments around.

The second thing is why air hole should be directly under wick? Why if the wick is not over the air hole, the vapor is lower and you have a harsh throat hit (also applies to Gennies) is it related to oxygen??

A lot of people know we should do all these things, but i want to experiment with some coil designs and it is good to know before hand what to expect.

 

[imeothanasis]

Air and liquid are in a balance inside tank. When you remove liquid from tank its replaced by air, so when you close air control you see bubbles because more quantity of metal goes inside the tank so the liquid is pressed and has to go somewhere. It goes on wicks. But air replace the liquid that left the tank and thats why you see bubbles. Air is replacing the liquid that left

The emply space inside tank is full of air. There is no vacuum inside tank. Only NASA lol can produce a vacuum because taking the air from inside a bottle for example requires very powerful machines.

But lets say that we find a way to take the air from a bottle. The atmospheric pressure is so big that will squezze the bottle, exept the bottle has very fat metal walls. Imagine a bottle of coca cola that you take the air from it with your mouth. The bottle will be squezzed. Same is happening with your body. The air inside your body is in balance with the air outside your body. If you hadnt air inside you then the outside air would press you till death

Yes, the capilarity makes the liquid travel on wick

As for the hole of air under the wick:

How you would be able to inhake the smoke that coil produce if air didnt come through it? if for example open a hole on the side of the mouthpiece, the air will travel from this hole to your mouth. But the coil is lower than this hole. So the air will not be able to take with him the smoke of the coil

 

[Aal_]

Thank you Imeo for your elaborate answers. Some comments:

1- Why do people say "open the cap to release pressure, if you don't release pressure liquid wont come up the wicks". What pressure if there is no vacuum? release what?
2- Regarding the airhole i get your point 100%. But why do we get this bad throat hit when the air hole is not lined up? shouldn't we get only air?

 

[imeothanasis]

1. when you inhale with a low ohm coil the necessary quantity of liquid is big and air doesnt come out of the tank as quickly as we want to let this big quantity of liquid absorbed from the wick. So when we open the cap, then a lot of air comes inside the tank and air and liquid comes in balance immediately

2. I dont know what you mean by this aal. I havent vape an atomizer like this

 

[Aal_]

Thanks again imeo. Sorry I'm bothering with all this but I knew you're the person to ask

1- I think I understand what you mean. Its like a syringe with half liquid inside. If you hold it needle down, liquid does not escape. But if you remove the plunger. Liquid quickly will fall from the needle. Am I close with the analogy?

2- here I am referring to Genesis atomizers. When you don't put the air hole in front of wick, it gives this harsh throat hit without much vapor.

 

[imeothanasis]

No problem aal

1. Exactly as you said.

2. I cant talk about this issue because I dont use mesh style atomizers. But I think its because too much heat is produced and air doesnt cool the coil if it doesnt hit it. I cant really tell.

 

[Aal_]

Thanks

 

[imeothanasis]

No problem aal. I hope that I helped you, at least on things that I know for sure. I dont like giving semi-info or wrong info to my customers

 

[Xylocaine]

Imeo is right, in any atomizer that you have to align the air hole (Most rebuildables - Phoenix, iGo-L, AGA, etc) the air isn't cooling the coil and producing vapor so what you end up inhaling is really hot air - I just had a bit of a fight with my iGo-L figuring out the sweet spot after putting a new silica wick/coil in it. In a genesis atomizer a lot people pull the fill screw and leave it out so that you do not experience 'vapor lock'. This makes it so that pressure outside and inside the tank can be equalized and promotes the capillary action. I don't know if gennies have the same problem when running silica wick as with mesh but there are several factors that go into the capillary action of the mesh from oxidation, thickness (size and style), your liquid and of course the eyelets (probably wrong term there but oh well) of the mesh itself.