Horizontal Air Sparging Design

How can I calculate the air flow needed in horizontal air sparging (for clay for example)?  

All the information I found is about recommended flows for vertical wells (0.04 - 1.1 m3/min) but this data is not applicable for horizontal pipes.

I tried to find a radius of influence of aeration but only found data of solubility of air in water.

Do you have any recommendations on how to calculate the required flow?