Question

Air enters a rectangular duct measuring 30 cm x 40 cm with a velocity of 8.5 m/s and a temperature of 40°C. The flowing air has a thermal conductivity 0.028 W/m-deg, kinematic viscosity 16.95 x 10^-6 m^2/s and from empirical correlations the Nusselt number has been approximated to be 425. Work out the equivalent diameter of the flow passage, the flow Reynolds number and the convective heat flow coefficient.

Name: Air enters a rectangular duct measuring 30 cm x 40 cm with a velocity of 8.5 m/s and a temperature of 40°C. The flowing air has a thermal conductivity 0.028 W/m-deg, kinematic viscosity 16.95 x 10^-6 m^2/s and from empirical correlations the Nusselt number has been approximated to be 425. Work out the equivalent diameter of the flow passage, the flow Reynolds number and the convective heat flow coefficient.
Uploaded: 2022-05-29T09:55:01-08:00
Duration: 1 min 37 s
Channel: Ishana K

          Air enters a rectangular duct measuring 30 cm x 40 cm with a velocity of 8.5 m/s and a temperature of 40°C. The flowing air has a thermal conductivity 0.028 W/m-deg, kinematic viscosity 16.95 x 10^-6 m^2/s and from empirical correlations the Nusselt number has been approximated to be 425. Work out the equivalent diameter of the flow passage, the flow Reynolds number and the convective heat flow coefficient.

Air enters a rectangular duct measuring 30 cm x 40 cm with a velocity of 8.5 m/s and a temperature of 40°C. The flowing air has a thermal conductivity 0.028 W/m-deg, kinematic viscosity 16.95 x 10^-6 m^2/s and from empirical correlations the Nusselt number has been approximated to be 425. Work out the equivalent diameter of the flow passage, the flow Reynolds number and the convective heat flow coefficient.

Added by Ruben M.

Calculus: Early Transcendentals

James Stewart 8th Edition

Instant Answer

Solved by Expert Ishana K

05/29/2022

Step 1

3 \times 0.4}{0.3 + 0.4} \] \[ D_h = \frac{0.24}{0.7} \] \[ D_h = 0.342 \, m = 34.2 \, cm \] Show more…

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Air enters a rectangular duct measuring 30 cm x 40 cm with a velocity of 8.5 m/s and a temperature of 40°C. The flowing air has a thermal conductivity of 0.028 W/m-deg, kinematic viscosity of 16.95 x 10^-6 m^2/s, and from empirical correlations, the Nusselt number has been approximated to be 425. Work out the equivalent diameter of the flow passage, the flow Reynolds number, and the convective heat flow coefficient.