Explanation: A layer put above the liquid distributor is called dry packing, which acts as an entrainment eliminator, to remove the entrainment liquid droplets.

Explanation: A parameter P that characteristics the packing and is called as packing factor, originally introduced by Lobo in 1945, also represented as Cf.

Explanation: The packing factor is taken as to be ap/e3, where ap= surface of the packing per unit volume and e = void fraction of the packed bed.

Explanation: The difference between the total hold up and the static holdup is called Operating holdup and sometimes is also refereed as dynamic holdup.

Explanation: It is the liquid throughput below the film packing surface breaks up reducing the wetted area.

Explanation: It is the liquid remaining in unit volume of the bed after the bed is drained for a reasonable time, it is pretty small compared to total holdup.

Explanation: Plot of dP vs. Fs, it may be noted that quantity Fs is also taken as a measure when pg<<pl, it is desirable that the flooding point or pressure drop is determined by interpolation.

Explanation: Minimum liquid rate for random packing is reported as 0.5-2 gpm/ft2 and for structured packing is 0.1-0.2 gpm/ft2.

Explanation: The Ergun’s equation can be used using the pressure drop calculation for all the packed towers and other equipment’s that use packings.

Explanation: The quantity Cs is akin Souder’s-Brown constant, may be corrected for changes in interfacial tension and viscosity if necessary.