Answered: Nu = 0.5Re0.8 Pr0.4.

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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Question

Heat transfer correlation for a given convection situation was obtained as Nu = 0.5Re0.8 Pr0.4. Dry air passes over a similar object of 2 m characteristic length with a velocity of 10 m/s. What is the evaporation rate in unit area if at the liquid surface the mass concentration (the partial density of the liquid) is 0.00792 kg/m3? Physical properties; ν = 20x10-6 m2/s, Pr = 1, Le =1

A. 0.0025 kg/m2s

B. 0.31548 m/s

C. 0.31548 kg/m2s

D. 0.0025 m/s

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