Air at 10°C and 1 atm is flowing parallel at a velocity of 15.5 m/s over the top flat surface of copper plate. The top surface of the copper plate is 0.03m by 0.03m square. The temperature of copper plate is uniform at 65.6°C. For laminar flow, calculate the dimensionless Reymolds number (Nge) and Nussel number (Nnu).

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Air at 10°C and 1 atm is flowing parallel at a velocity of 15.5 m/s over the top flat
surface of copper plate. The top surface of the copper plate is 0.03m by 0.03m
square. The temperature of copper plate is uniform at 65.6°C. For laminar flow,
calculate the dimensionless Reymolds number (Nre) and Nussel number (NNu).
Table A.3-3a. Physical Properties of Air at 101.325 kPa (1 Atm Abs), SI
Units
Bx (Bp²/1?)
T
(kJ/kg · u x T (Pa ·s, k (W/m
103
(1/K •
(°C) T (K) (kg/m³) K)
-17.8255.41.379 1.0048 1.62 × 6s
or kg/m · s) · K) Npr (1/K) m³)
0.022500.7203.92 2.79 x
108
O 273.21.293 1.0048 1.72 × (0-5
0.024230.7153.65 2.04 ×
108
10.0 283.21.246 1.0048 1.78 ×/0
0.024920.7133.53 1.72 x
108
37.8 311.01.137 1.0048 1.90%/0-S
0.027000.7053.22 1.12 x
108
Select one:
O A. NRe = 27826.58; NNu =98.58
O B. NRe = 23215.74; NNu =152.68
O C. NRe = 27826.58; NNu = 152.68
O D. NRe = 23215.74; NNu =98.58
Transcribed Image Text:Air at 10°C and 1 atm is flowing parallel at a velocity of 15.5 m/s over the top flat surface of copper plate. The top surface of the copper plate is 0.03m by 0.03m square. The temperature of copper plate is uniform at 65.6°C. For laminar flow, calculate the dimensionless Reymolds number (Nre) and Nussel number (NNu). Table A.3-3a. Physical Properties of Air at 101.325 kPa (1 Atm Abs), SI Units Bx (Bp²/1?) T (kJ/kg · u x T (Pa ·s, k (W/m 103 (1/K • (°C) T (K) (kg/m³) K) -17.8255.41.379 1.0048 1.62 × 6s or kg/m · s) · K) Npr (1/K) m³) 0.022500.7203.92 2.79 x 108 O 273.21.293 1.0048 1.72 × (0-5 0.024230.7153.65 2.04 × 108 10.0 283.21.246 1.0048 1.78 ×/0 0.024920.7133.53 1.72 x 108 37.8 311.01.137 1.0048 1.90%/0-S 0.027000.7053.22 1.12 x 108 Select one: O A. NRe = 27826.58; NNu =98.58 O B. NRe = 23215.74; NNu =152.68 O C. NRe = 27826.58; NNu = 152.68 O D. NRe = 23215.74; NNu =98.58
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