(Answered)-What is the pressure drop ("H 2 O) through a vertical rock bed - (2025 Updated Original AI-Free Solution

Question

1. What is the pressure drop (?H₂O) through a vertical rock bed storage bin with a 5 ft. x 5 ft. flow area and a 6 ft. flow length? The air flow rate through the bed is 500 CFM. The river washed rock pebbles are 2? in diameter with 30% voids.