How much lift does air have underwater?
Answer:
It lifts as much as it displaces.
Air takes the stair not the elevator
If the volume of the air is constant, it is simple to solve.
Because then you can calculate the buoyancy by:
F=rho * V * g
g: Gravity
V: 1cm³
rho: density of the surrounding fluid (water, any gas or oil- doesn't matter)
Consider,1 cubic ft. of water weighs about 62 pounds a cubic ft of air very little.
The lifting capacity of that air should be about 62 pounds
A formula would have to consider temp and pressure.
Sorry I can't be of more help.
Buoyant force = - FluidDensity x Volume of object x g
Where the fluid is water, the volume is the air and g is the gravity force (9.81 N/kg)
The lift of airlift pumps depend upon the difference in density of aerated water column and the water density outside such column. Greater the difference, greater the lift. This means higher airflow / bubling will help to increase the lift. PL. REFER PERRY'S CHEMICAL ENGG,. HANDBOOK FOR THE FORMULA. IT IS AVAILABLE THERE.
The amount of lift in simple terms is equal to the amount of water displaced by the air. If you displace 1L of fresh water then you should expect about 1Kg of upward force.
This upward force changes with the depth of water (when dealing with a compressable item like a bubble, bag of air, etc... As that bubble or bag of air is forced down, the pressure on the bag increases causeing the volume occupied by the bag/bubble to decrease and therefor the upward force decreases. For example: If you had 1 L bubble at just under the surface of the water you would have an upward force of KG. If you took that very same bubble and forced it down to about 10 meters or so its volume would have decreased to 1/2 L and it would only exert and upward force of around .5Kg.
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