Air at 5 m/s, atmospheric pressure, and 20°C flows over both sides of a flat plate that is 0.8 m long and 0.3 m wide. Determine the total drag force on the plate. Determine the total drag force when the single plate is replaced by two plates each 0.4 m long and 0.3 m wide. You can assume the density and viscosity of air to be 1.21 kg/m³ and 1.81 x 10-5 N-s/m², respectively.
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Reynolds number (Re) is given by: Re = (ρ * V * L) / μ where ρ = 1.21 kg/m³ (density of air), V = 5 m/s (velocity), L = 0.8 m (length of the plate), and μ = 1.81 x 10^-5 N-s/m² (viscosity of air). Re = (1.21 * 5 * 0.8) / (1.81 x 10^-5) Re ≈ 267,403 Show more…
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