Chemical Engineering - Heat Transfer - Discussion

Discussion Forum : Heat Transfer - Section 8 (Q.No. 22)
22.
When the ratio of the Grashoff number and to the square of Reynolds number is one, the dominant mechanism of heat transfer is
free convection
entry length problem in laminar forced conduction (developing thermal boundary layer)
mixed convection (both free and forced)
forced convection
Answer: Option
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Discussion:
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Mallu U said:   2 years ago
The ratio of the Grashof number (Gr) to the square of the Reynolds number (Re) is a dimensionless quantity known as the Prandtl number (Pr).

Mathematically, Pr is given by:

Npr = Ngr/Nre^2.

This dimensionless parameter is important in the study of heat transfer, particularly in forced and natural convection flows.

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