The issue of flow resistance around the tube bundle of the light tube (solved by a junior member)
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Regarding the resistance experienced by flue gas as it flows through the tube bundle, I found two formulas. The values calculated using these two formulas are very high. One of the formulas is p=0.0204*C*N*v2 (where p represents the resistance, C is a correction factor related to the arrangement of the tubes, N is the number of tube rows, and V2 is the square of the flow velocity at the narrowest section). The other formula is p=0.167*C*N*ρ*v2 (where p is still the resistance, C is the same correction factor, N is the number of tube rows, V2 is the square of the flow velocity at the narrowest section, and ρ is the density of the flue gas). Which formula should be used to accurately determine the resistance experienced by flue gas flowing through the tube bundle?
The pressure drops calculated by the two formulas have different units