- 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: Natural convection is characterised byA Grashhoff number
B Peclet number
C Reynolds number
D Prandtl number
ANS:A - Grashhoff number The correct term is the Grashof number, not "Grashhoff." The Grashof number (Gr) is a dimensionless parameter used in fluid mechanics to characterize natural convection flows. It represents the ratio of buoyancy forces to viscous forces within a fluid flow system. The formula for the Grashof number is typically expressed as: 32Gr=ν2g⋅β⋅ΔT⋅L3 Where:
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