Question: What is the minimum air velocity (in the upper half of the airway) needed to prevent layering of CH 4 in the following airways? i)

What is the minimum air velocity (in the upper half of the airway) needed to prevent layering of CH4 in the following airways?

i) an airway inclined steeply upwards in the direction of airflow,

ii) a horizontal airway,

iii) an airway inclined downward in the direction of flow.

The airways are 6.10 m wide with an inflow of 0.189 m3/s CH4.

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