Example – Book Problem 3.59A spherical, 3 mm cryogenic probe at temperature -30 C isembedded into skin at 37°C. Frozen tissue develops andthe interface between the frozen and normal tissue is 0°C.If the thermal conductivity of frozen tissue is 1.5 W/m-K andheat transfer at the phase front is characterized by aconvection coefficient of 50 W/m?-K, what is the thickness ofthe frozen layer?4= 0.0015 mProbeT8.1 30 °C-T22=0°C12Normal tissueTen = 37 °Ch= 50 Wim2 -KoondFrozen tissue, k= 1.5 WimKdoonv

A spherical, 3 mm cryogenic probe at temperature -30 C is embedded into skin at 37°C. Frozen tissue develops and the interface between the frozen and normal tissue is 0°c. If the thermal conductivity of frozen tissue is 1.5 Wim-K and heat transfer at the phase front is characterized by a convection coefficient of 50 W/m?-K, what is the thickness of the frozen layer?

A spherical, 3 mm cryogenic probe at temperature -30 C is embedded into skin at 37°C. Frozen tissue develops and the interface between the frozen and normal tissue is 0°c. If the thermal conductivity of frozen tissue is 1.5 Wim-K and heat transfer at the phase front is characterized by a convection coefficient of 50 W/m?-K, what is the thickness of the frozen layer?

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.

Question

Example – Book Problem 3.59
A spherical, 3 mm cryogenic probe at temperature -30 C is
embedded into skin at 37°C. Frozen tissue develops and
the interface between the frozen and normal tissue is 0°C.
If the thermal conductivity of frozen tissue is 1.5 W/m-K and
heat transfer at the phase front is characterized by a
convection coefficient of 50 W/m?-K, what is the thickness of
the frozen layer?
4= 0.0015 m
Probe
T8.1 30 °C
-T22=0°C
12
Normal tissue
Ten = 37 °C
h= 50 Wim2 -K
oond
Frozen tissue, k= 1.5 WimK
doonv

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