Use of eddy properties in turbulent boundary layer - Heat Transfer

Q.  The eddy properties are used in turbulent boundary layer condition because
- Published on 12 Aug 15

a. the eddy properties may be small compared to molecular properties
b. the eddy properties may be large compared to molecular properties
c. the eddy properties may be small or may be large compared to molecular properties, but never equals to molecular properties
d. none of the above

ANSWER: the eddy properties may be large compared to molecular properties

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