What is the degree of cooling caused by air flowing from smaller diameter into a large diameter? How much does air cool as it expands?
If the air inlet was the biggest hole on the right and the outlets were the full smaller holes, would the air cool as it left each hole? Let's say that the surface area of the inlet equals the outlets.
Could these types of apparatus be linked in series to produce a staged cooling effect?
Does cooling only occur in change of pressure?