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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 0.028 W/m-ºc, kinematic viscosity 16.95 x 10-6 m2/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-ºc, kinematic viscosity 16.95 x 10-6 m2/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.

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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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 0.028 W/m-ºc, kinematic viscosity 16.95 x 10-6 m2/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.
Transcribed Image Text: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-ºc, kinematic viscosity 16.95 x 10-6 m2/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.
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