Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN: 9780190698614
Author: Sadiku, Matthew N. O.
Publisher: Oxford University Press
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Question

Find out the diameter of the spherical product being frozen in an air-blast wind tunnel. The initial
product temperature is 100C & cold air in the tunnel is at -120C. The product density is 1000 kg/m3
and the convective heat transfer coefficient for the air blast is 50 W/m2K. The thermal conductivity
of the product is 1.25 W/mK and the initial freezing temperature is -20C. The latent heat of fusion is
300 kJ/kg. Freezing time is 2.2 hrs

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