oxygen diffusion
oxygen diffusion
(OP)
Hello,
I have a container for growing plants that has a 4 gallon reservoir filled with water. The water level is refilled when it becomes low through a capped tube. Above the reservoir is a grid that allows air to pass through. On top of the grid is a peat-based growing media. The water reservoir is closed to the outside air except for a 0.250" hole.
My assumption is the oxygen diffuses through the grid into the peat based media. My question: is the hole large enough to bring the oxygen level back to 21% after it is depleted and how long will this take?
I have a container for growing plants that has a 4 gallon reservoir filled with water. The water level is refilled when it becomes low through a capped tube. Above the reservoir is a grid that allows air to pass through. On top of the grid is a peat-based growing media. The water reservoir is closed to the outside air except for a 0.250" hole.
My assumption is the oxygen diffuses through the grid into the peat based media. My question: is the hole large enough to bring the oxygen level back to 21% after it is depleted and how long will this take?





RE: oxygen diffusion
Unsteady state material balance with proper diffusion model considering the assumptions that might be applicable to your system can be solved by modeling with defined initial and boundary conditions to see the concentration profile across the hole vs the time.
That is my view for your case, and hope that would help.
Regards
RE: oxygen diffusion