Question

Air at 290 K flows at 3 m/s over a flat plate at 420 K. The air properties are as follows: density = 1.1 kg/m3, viscosity = 18.1 x 10-6 Pa.s, specific heat capacity = 1005 J/kgK, and thermal conductivity = 0.024 W/mK. The velocity and temperature profiles are assumed to be linear, giving the local Nusselt number to be . The flow will become turbulent at a Reynolds number of 5x105. Assume the width of the plate perpendicular to the air flow is 1m.

Name: air at 290 k flows at 3 ms over a flat plate at 420 k the air properties are as follows density 11 kgm3 viscosity 181 x 10 6 pas specific heat capacity 1005 jkgk and thermal conductivity 002 88022
Uploaded: 2023-10-01T18:43:33-08:00
Duration: 2 min 31 s
Channel: Adi S
Description: air at 290 k flows at 3 ms over a flat plate at 420 k the air properties are as follows density 11 kgm3 viscosity 181 x 10 6 pas specific heat capacity 1005 jkgk and thermal conductivity 002 88022

          Air at 290 K flows at 3 m/s over a flat plate at 420 K. The air properties are as follows: density = 1.1 kg/m3, viscosity = 18.1 x 10-6 Pa.s, specific heat capacity = 1005 J/kgK, and thermal conductivity = 0.024 W/mK. The velocity and temperature profiles are assumed to be linear, giving the local Nusselt number to be . The flow will become turbulent at a Reynolds number of 5x105. Assume the width of the plate perpendicular to the air flow is 1m.

Added by Paul W.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Adi S

10/01/2023

Step 1

- Pr = μ cp / k = (18.1e-6 Pa·s)(1005 J/kg·K) / (0.024 W/m·K) ≈ 0.76 - Re_L = ρ U L / μ = (1.1 kg/m^3)(3 m/s)(1 m) / (18.1e-6 Pa·s) ≈ 1.83 × 10^5 Show more…

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Air at 290 K flows at 3 m/s over a flat plate at 420 K. The air properties are as follows: density = 1.1 kg/m3, viscosity = 18.1 x 10-6 Pa.s, specific heat capacity = 1005 J/kgK, and thermal conductivity = 0.024 W/mK. The velocity and temperature profiles are assumed to be linear, giving the local Nusselt number to be . The flow will become turbulent at a Reynolds number of 5x105. Assume the width of the plate perpendicular to the air flow is 1m.