- Heat Transfer - Section 1
- Heat Transfer - Section 2
- Heat Transfer - Section 3
- Heat Transfer - Section 4
- Heat Transfer - Section 5
- Heat Transfer - Section 6
- Heat Transfer - Section 7
- Heat Transfer - Section 8
- Heat Transfer - Section 9
- Heat Transfer - Section 10
- Heat Transfer - Section 11


Heat Transfer - Engineering
Q1: h.D/K is called the __________ number.A Nusselt
B Peclet
C Rayleigh
D Grashoff
ANS:A - Nusselt The Nusselt number (Nu) is a dimensionless parameter used in heat transfer correlations to characterize the heat transfer coefficient (ℎh) of a fluid flow relative to the thermal conductivity (K) of the fluid or the material through which heat is being transferred. It represents the ratio of convective heat transfer to conductive heat transfer for a given flow regime. The Nusselt number is defined differently depending on the specific heat transfer situation, such as forced convection, natural convection, or boiling. However, in general, it is expressed as: =ℎ⋅Nu=Kh⋅L where:
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