The objective is to coat a hot steel pipe with molten polyethylene pellets to prevent corrosion. To achieve this, a column with a diameter of $1$ m and a height of $10$ m will be used to fluidize the pellets with air at a temperature of $300$ K$.$ The bed of pellets will have a desired void fraction of $0\mathrm{.}7$ and the pellets themselves will have a diameter of $5$ mm$.$ To calculate the total amount of air required for this process, the density of the polyethylene is $920$ kg m$-3.$