Size of gas bubbles in water

[geoffthehammer]

I am trying to design a small piece of equipment that has an inflow (of the order of milli-litres per minute)of water and must separate any gas bubbles from the water before the water is pumped on to the next stage of the equipment. The gas bubbles form because the water has been intentionally saturated with the gas and is subsequently heated by several degrees which causes some degassing. We find that the gas bubbles accumulate on the walls of the container and the surface of the water.

I have two questions regarding gas bubbles in water:
1. If a gas bubble forms in water and reaches the surface of the water, what is the critical size the bubble must attain before it bursts?
2. If the bubble adheres to the side of the container, what is the critical size it must attain before it can break free and floats to the surface?

The container is non-metallic and can be either p.t.f.e. or acrylic

 

[pmover]

i suspect the bubble size depends upon fluid properties and atmospheric conditions.
a simple technique to remove the bubbles is to move/stir the fluid or firmly tap/shake the holding container.

good luck!
-pmover

 

[MortenA]

This sounds as very specialised knowledege and may require research and/or experiments.

It dose however in my mind have some association whith "flocculation" - an area where much work is done in connection with mining and fermentation. Maybe you should try searching the net/your local univercity library for these subjects?

Best regards Morten